2017 maine potato variety trials ne1231 regional … variety trials 2017rpt posting.pdffar below...

2017 MAINE POTATO VARIETY TRIALS

NE1231 REGIONAL TRIALS AND ADVANCED BREEDING LINES

EXETER, PRESQUE ISLE, AND ST. AGATHA, MAINE

Gregory A. Porter, Professor of Agronomy

Paul C. Ocaya, Research Associate

Bruce MacFarline, Scientific Technician

Tammy Mills, Scientific Technician

Beth Plummer, Scientific Technician

School of Food & Agriculture

and

Maine Agricultural and Forest Experiment Station

University of Maine

Orono, ME 04469

Not for Reproduction

without Permission

-Comments Welcome-

Mimeo 2017-01

CONTENTS

Introduction 1

Methods 1

Results:

Discussion of Trial Results 1Top Prospects in the 2017 Trials 5

Results (Data Tables):

Management Practices by Location 7Rainfall by Location 8Aroostook Research Farm NE1231 Regional Trials 9Central Maine NE1231 Regional Trial 15Northern Aroostook County NE1231 Regional Trials 17French Fry Color and Uniformity, NE1231 Trials (2017 Crop) 21French Fry Color and Texture, NE1231 Trials (2016 Crop) 22Storage Evaluations (Small-lot Samples, 2016 Crop) 23Central Maine March Chip Colors (2016 Crop) 26Central Maine Advanced Breeding Clone Trial, 2017 27Northern Aroostook County Advanced Breeding Line Trials, 2017 29French Fry Color and Uniformity, Advanced Russet Trial (2017 Crop) 34Advanced Red- and Purple-skinned Clone Trial, 2017 36Washed Ratings Appearance from Storage (2016 Red Trials) 38Sensory Evaluation for Baked and Boiled Quality (2016 Crop) 39Key to NE1231 Rating Codes 40

ACKNOWLEDGMENTS

This project represents the combined efforts of many people and we are appreciative ofall those involved. Most of the funding comes from the University of Maine, the Maine PotatoBoard, and a USDA-NIFA Special Grant for Potato Breeding Research (Potato Breeding andVariety Development in Eastern United States). We greatly appreciate the field sites andmanagement provided by our grower cooperators during 2017 (Crane Farms, Inc. for the Exetersite and Labrie Farms, Inc. for the St. Agatha site). Many thanks to the Maine Seed PotatoBoard, Maine Potato Breeding Program, Cornell University, Michigan State University,Colorado State University, University of Wisconsin, North Dakota State University, TexasA&M University, and USDA Potato Breeding Program (Beltsville, MD and Aberdeen, ID) forproviding seed potatoes for these trials.

Maine

G.A. Porter, P.C. Ocaya, B. MacFarline, T.Mills, and B. Plummer.

University of Maine; Orono, ME 04469

Introduction: Potato variety trials were conducted at three locations in Maine as part of the NE1231 Regional

Project (Development of New Potato Clones for Environmental and Economic Sustainability in the Northeast).

Forty varieties and clones were tested at Aroostook Research Farm, Presque Isle, Maine. Thirty-five NE1231 and

advanced breeding clones were tested on a commercial farm in Exeter (central Maine), while sixty-seven NE1231

and advanced breeding clones were tested on a commercial farm in St. Agatha (northern Maine). The primary

objective of all of the Maine trials is to determine performance, quality, and storage characteristics of promising

potato clones and new varieties in Maine.

Methods: Single-row plots, 25 feet long, were utilized for the NE1231 trials at Aroostook Research Farm. The plot

length for the advanced selection, Central Maine NE1231, and St. Agatha NE1231 trials was 20 feet. All trials were

hand planted using randomized complete block designs and four replications (two replications per treatment for the

least advanced clones in the Central Maine and St. Agatha trials). The seedpiece spacing used for each line is listed

in subsequent tables. Details of important management practices are presented in Maine Table 1. At the Presque

Isle site the varieties were grouped so that separate tests could be vinekilled and harvested based on maturity

classification. Remaining cultural practices were similar to those used on commercial farms in the area. Specific

gravity was determined at harvest using the weight-in-air/weight-in-water method. Hollow heart ratings indicate

the number of hollow tubers observed per 40 large tubers examined. Percent hollow heart is based on 10 tubers per

replicate plot whenever 10 tubers of the appropriate size class are available. Unless noted otherwise chip color

evaluations were conducted during December following storage at 50 F. Chips were fried at 350 F for threeo o

minutes and evaluated using an Agtron M35, calibrated with the black "0" disk = 0 and the white "90" disk = 90.

Chips were crushed and reported values are means from four replicates per variety. Each sample was read three

times with thorough mixing between readings.

Susceptibility to skinning and shatter bruise was measured soon after harvest. Approximately 10 lbs of

tubers that exceeded 1f” diameter were tumbled in a drum with three stones for 1 minute at 15 rpm. Each tuber

was then rated for the percentage of the tuber surface affected by skinning or shatter bruise and the percentage of

tubers with air and/or thumbnail cracks. Additional samples were collected for shatter and blackspot bruise

susceptibility measurements with the weight-drop method as noted in Table 17.

Results:

Rainfall, General Growth, and Plant Stands. Rainfall by month and location is listed in Maine Table 2.

Rainfall was abundant at all three sites during May and June. All three sites had low rainfall during July and

August. Supplemental irrigation was applied during July and August at the Central Maine site, while Presque Isle

and St. Agatha experienced significant water deficits during tuber bulking. Early plant growth was good at all three

sites. Adirondack Red, Reveille Russet, Russet Burbank, Snowden, Teton Russet, and AF4831-2 had relatively

poor early to mid-season vigor at the Presque Isle site. Katahdin, AF5563-5, B2834-8, and COAF10055-6 had

relatively poor early to mid-season vigor at the Exeter site. Russet Norkotah, AAF08434-1, AF5407-13, BNC364-

1 and ND8068-5Rus had relatively poor early to mid-season vigor at the St. Agatha site. Pest control practices

were effective at all sites. Plant stand equaled or exceeded 90% of targets for most clones at all three sites. The

only NE1231 regional trial exceptions at Presque Isle were Snowden (82%) and Russet Burbank (80%). At Exeter,

AF4648-2 (86%) had relatively low percent stand. At St. Agatha, Russet Burbank (88%), Shepody (89%), and

BNC364-1 (89%) had relatively low percent stands. In the advanced selection trials at Exeter only AF5682-5

(88%) had percent stands that were below 90%. At St. Agatha, AF5522-4 (88%) and NDAF092412-3 (89%) stands

were below 90%. None of the clones in the Presque Isle advanced red trial had less than 90% stands. Yields were

far below average at Presque Isle, above average at Exeter and average at St. Agatha. Total yields for Presque Isle,

Exeter, and St. Agatha averaged 168, 345, and 262 cwt/A, respectively (mean of six standard varieties grown at all

locations). Common scab was a serious problem at the Exeter and St. Agatha sites.

Aroostook Research Farm NE1231 Regional Potato Variety Trials. Yield and quality results for the 2017

NE1231 trials at Aroostook Research Farm are presented in Maine Tables 3 to 8. Yields were poor due to low

rainfall during tuber bulking. Tuber size was small and very little hollow heart incidence was observed. In the red

trial, Dark Red Norland and AF5245-1 had U.S.#1 yields that were equal to Chieftain. AF4831-2 had lower US#1

yields than Dark Red Norland. Dark Red Norland, AF4831-2, and AF5425-1 had good tuber appearance. AF4138-

8 and AF5280-5 were competitive with Superior as early fresh market whites, though AF4138-8 yields were

slightly lower than Superior. Both had low external defects, small tuber size, and good tuber appearance. Superior

had high external defects incidence. Yukon Gold and AF5429-3 had especially good yields in the mid-season trial.

Katahdin, Yukon Gold, AF4648-2, AF5040-8, AF5225-1, AF5429-3, BNC364-1, and NY161 had good tuber

appearance scores. AF4648-2 and AF5429-3 had promising yield, appearance, gravity, and chip color for the

chipping market. Snowden and Kennebec has high external defects incidence. Caribou Russet and Reveille Russet

were the top yielding varieties in the russet trial. Shepody, Teton Russet, AF4296-3, and TX08352-5Ru also had

good yields. Caribou Russet, Reveille Russet, Russet Norkotah, Teton Russet, and TX08352-5Ru had good tuber

appearance scores. Russet Burbank and ND8068-5Rus had high external defects incidence. Hollow heart

incidence in large-sized tubers was above 10% for Atlantic (25%) and Superior (14%). Atlantic, Caribou Russet,

AF4648-2, AF5429-3, B2904-2, BNC364-1, and ND8068-5Rus had the highest specific gravities. Chip color

scores were particularly good for Kennebec, AF4648-2, AF5040-8, AF5280-5, AF5429-3, BNC364-1, and NY157.

Central Maine NE1231 Regional Potato Variety Trial. Yield and quality results for the 2017 NE1231 trial

at Exeter are presented in Maine Tables 9 and 10. Yields were good in this trial and tuber sizing was generally

good. Atlantic, Superior, AF4138-8, AF4552-5, AF5280-5, B2869-29, B2904-2 and NY157 had especially high

total and US#1 yields. AF4138-8, AF5040-8, B2869-29, and B2904-2 had small tuber size profiles. AF4138-8,

AF4648-2, and AF5280-5 had good tuber appearance scores. Atlantic, Katahdin, Kennebec, Snowden, Yukon

Gold, AF5040-8, AF5429-3, B2869-29, B2904-2, and BNC364-1 and NY154 had especially high external defects

incidence (mostly common scab), while AF4138-8 and AF5280-5 had low incidence. Atlantc (12%), Kennebec

(15%), and Superior (10%) had high hollow heart incidence. Atlantic, Snowden, AF4552-5, AF5040-8, B2869-29,

B2904-2, and NY157 had specific gravities of 1.082 or higher. Atlantic, Snowden, Superior, AF4648-2, AF5040-8,

AF5280-5, AF5429-3, B2869-29, BNC364-1, and NY157 had the best chip colors in the trial.

Northern Aroostook County NE1231 Regional Potato Variety Trials. Yield and quality results for the

2017 NE1231 trials at St. Agatha are presented in Maine Tables 11 to 14. Atlantic, AF4552-5, AF4648-2,

AF5225-1, NY157, and NY161 had particularly good total and U.S. #1 yields in the round-white trial. Katahdin,

Superior, Yukon Gold, AF4648-2, AF5225-1, AF5429-3, and NY161 had good tuber appearance. None of the new

reds had yields exceeding the Chieftain standard, however, both of the test clones had yields that were comparable

to those of Dark Red Norland. Growth cracks and nonuniform skin color detracted from the appearance of Dark

Red Norland. AF4831-2 and AF5245-1 had good tuber appearance. Caribou Russet had particularly high total and

US#1 yields in the russet trial. Russet Burbank, Reveille Russet, Teton Russet, AF4296-3 and TX08352-5Ru also

had good yields. Russet Burbank, Shepody, and ND8068-5Rus were the only russet- or long-type clones with high

levels of external defects. Atlantic, Yukon Gold, Snowden, AF4648-2, AF5040-8, AF5429-3, and NY157 had

specific gravities of 1.084 or higher in the round-white trial. Caribou Russet, AF4296-3, and ND8068-5Rus had

specific gravities of 1.077 or higher in the russet trial. None of the clones had high levels of hollow heart at St.

Agatha. Snowden, AF5040-8, AF5280-5, AF5429-3, and NY157 had particularly good chip color.

French Fry Color and Uniformity, 2017 NE1231 Trials. Fry color and color uniformity were measured on

fresh cut tuber slabs taken from 50F storage (Table 15). Stem-end color defects were prevalent in Caribou Russet

at the Presque Isle site. Fry color was darker at the St. Agatha site and three clones (Caribou Russet, Reveille

Russet, and TX08352-5Ru) had very high stem-end defects. AF4296-3 and ND8068-5Rus produced good quality

fries at both sites. Shepody and Teton Russet produced good quality fries at only the Presque Isle site.

French Fry Processing from the 2016 Aroostook Research Farm Test. French fry color and texture

evaluations were conducted on nine 2016 NE1231 clones during winter of 2016-2017 (Table 16). Russet Burbank,

Caribou Russet, Teton Russet, and AF4296-3 had especially light fry color. Dark fry color was expecially a

problem for Reveille Russet and AF4953-6. Fries of Caribou Russet, Shepody, AF4615-5, and AF4953-6 were

non-uniform. AF4615-5 had significantly greater graying than Russet Burbank. Fries from AF4953-6 had poor

texture. Texture ratings for Caribou Russet, Reveille Russet, and Russet Norkotah were also relatively poor. Only

Teton Russet and AF4296-3 french fries were judged to be equal to Russet Burbank in overall fry quality (length,

fry color, uniformity, graying, and texture).

Aroostook Research Farm Small-scale Storage Evaluations. Data on small-scale storage and processing

characteristics were collected from 32 NE1231 varieties and clones during the 2016-2017 storage season (Maine

Tables 17 and 18). Very good chip colors were obtained from 50 F February storage for the following clones growno

at Presque Isle: AF4648-2, AF5040-8, AF5280-5, B3005-7, and NY157. Atlantic, Snowden, AF4648-2, AF5040-

8, AF5280-5, B3005-7, BNC364-1, NY154, and NY157 produced very light chips from 50 F March storage in theo

Central Maine test (Maine Table 18). In the Presque Isle test, Snowden, AF4648-2, B3005-7, BNC364-1, NY154,

and NY157 had very light chip colors directly from 45 F storage. In the Central Maine test, Snowden, B3005-7,o

BNC364-1, NY154, and NY157 produced particularly good chip colors directly from 45 F storage. None of theo

clones in the Presque Isle test produced good chips directly out of 38 F storage. B3005-7, NY154, and NY157o

produced good chips when reconditioned from cold storage. French fry processing types with relatively good

reconditioning from 38 F storage were Russet Norkotah and AF4296-3. In the Central Maine test, Snowden,o

AF5040-8, AF5280-5, B3005-7, BNC364-1, NY154, and NY157 reconditioned very nicely from 45 F storage. o

Skinning and bruise test scores for the 2016 field season are presented in Maine Table 17. The skinning

and shatter bruise scores from the bruise barrel test were presented last year. Shatter bruise susceptibility scores

were particularly good for Caribou Russet, Katahdin, Reveille Russet, Russet Norkotah, Shepody, Snowden,

AF4296-3, AF4648-2, AF4615-5, AF5280-5, B3005-7, and NY154, while they were poor for Atlantic, Dark Red

Norland, AF4138-8, AF4831-2, AF5245-1, BNC244-10, BNC364-1, CO00291-5R, and NY157. Blackspot bruise

susceptibility scores were particularly good for Kennebec, Reveille Russet, Russet Norkotah, Shepody, Teton

Russet, AF4138-8, AF4296-3, AF4648-2, AF4985-1, and AF5280-5 while they were especially poor for Atlantic,

Snowden, AF4552-5, BNC244-10, CO00291-5R, and NY157.

Chieftain, Katahdin, Kennebec, Reveille Russet, Russet Burbank, Yukon Gold, AF4138-8, AF4296-3,

AF4552-5, AF4615-5, AF4648-2, AF4985-1, AF5040-8, BNC364-1, CO00291-5R, and NY157 required at least

210 days to reach the one-half-inch sprout stage. Caribou Russet, Shepody, AF4831-2, and BNC244-10 reached the

one-half-inch sprout stage in 180 days or less. Selections with very low weight loss (<4%) from 38 F storage were:o

Chieftain, Reveille Russet, Russet Burbank, Russet Norkotah, Shepody, Teton Russet, Yukon Gold, AF4552-5, and

AF5280-5. Selections with very low weight loss (<7%) from 50 F storage were: Kennebec, Reveille Russet, Russeto

Burbank, Shepody, Yukon Gold, AF4296-3, and AF4615-5. Selections with high weight loss (15% or more) from

50 F storage were: Dark Red Norland, Katahdin, AF5040-8, AF5280-5, and BNC244-10.o

Central Maine Advanced Breeding Lines. Yield and quality results for the 2017 advanced breeding line

trials at Exeter are presented in Maine Tables 19 and 20. Clones with outstanding US#1 yields were AAF10577-1,

AF5484-3, AF5648-3, AF5682-3, AF5682-5, BNC369-4, NDAF113490C-6, NDAF113491C-6 and WAF10664-3.

Specific gravities were > 1.085 for Atlantic, AF5648-3, AF5682-3, NDAF113490C-6 and WAF10664-3. AF5635-

8 and AF5648-3 had very small tubers. Atlantic, Snowden, AF5677-4, B2834-8, NDAF113470C-3, and

WAF12065-8 had especially high levels of external defects (usually sunburn and common scab). AAF10577-1,

AF5484-3, AF5563-5, AF5635-8, AF5648-3, AF5682-3, COAF10055-6, NDAF113470C-3, NDAF113490C-6, and

WAF10664-3 had particularly good tuber appearance. Atlantic, AF5484-3, and NDAF113490C-6 had 10% or more

hollow heart. Chip color scores were generally good, however, three clones had an Agtron score below 66:

AAF10577-1, AF5484-3, and NDAF113491C-6. AF5635-8, AF5682-3, AF5682-5, BNC369-4, NDAF113470C-3,

and WAF12065-8 had especially good chip color.

Northern Aroostook County Advanced Breeding Lines. Yield and quality results for the 2017 advanced

breeding line trials at St. Agatha are presented in Maine Tables 21 to 24. Common scab was a significant problem

for some clones in this trial. Top performing clones for US#1 yields in the round-white trial were: Atlantic,

Katahdin, AAF08155-1, AF5450-7 and NDAF113458-2. Atlantic, Superior, and AF5677-6 had specific gravities

that were 1.080 or above. AF5658-6, COAF10018-2, and NDAF102629C-4 had particularly small tuber size.

COAF10018-2 had greater than 20% scab incidence. Only NDAF113458-2 (15%) had greater than 5% hollow

heart incidence in large-sized tubers. Atlantic, AF5858-6, AF5677-6, COAF10018-2, and NDAF102629C-4 had

chip color scores that were quite good (>65). AF5533-2, AF5658-2, NDAF102629C-4, and NDAF113458-2 had

particularly good tuber appearance and relatively low defects.

Of 27 russet-long clones, Russet Burbank, AAF10626-1, AF4872-2, AF5071-2, AF5164-19, AF5179-4,

AF5312-1, AF5613-3, NDAF092412-3Rus, and WAF10612-1Rus had particularly good US#1 yields. Specific

gravities were generally moderate with 11 clones >1.080 (AAF07521-1, AAF08434-1, AAF10626-1, AF4872-2,

AF5071-2, AF5406-10, AF5407-13, AF5599-5, WAF10051-1Rus, WAF10073-3Rus, WAF10509-3Rus). Four

clones had especially high external defects incidence: Shepody, AAF07521-1, AF5164-19, AF5525-2, and

WAF10051-1Rus. Very little hollow heart was observed in this trial. Five clones had better chip color scores than

both Russet Burbank and Shepody: AAF08434-1, AAF10245-1, AF4872-2, AF5625-1, WAF10051-1Rus. Russet

Norkotah, AAF08434-1, AF5071-2, AF5164-19, AF5179-4, AF5312-1, AF5406-7, AF5468-5, AF5599-5, AF5613-

3, WAF10051-1Rus, and WAF10612-1Rus had good tuber appearance ratings.

French Fry color and Uniformity, 2017 Advanced Russet Trial. Fry color and color uniformity were

measured on fresh cut tuber slabs from 27 potato clones taken from 50F storage (Table 25). Stem-end color defects

were prevalent in Russet Burbank, Russet Norkotah, AF4872-2, AF5164-19, AF5525-2, AF5522-4, and AF5625-1.

Shepody, AAF07521-1, AAF08434-1, AAF10245-1, AAF10626-1, AF5071-2, AF5091-8, AF5312-1, AF5406-10,

AF5407-13, AF5468-5, NDAF092412-3Rus, WAF10051-1Rus, and WAF10073-3Rus produced good quality fries.

Presque Isle Advanced Red- and Purple-skinned Breeding Clones. Yield and quality results for the 2017

advanced breeding red- and purple-skinned line trials at Presque Isle are presented in Maine Tables 26 and 27.

BNC201-1 and NDAF102696C-5 had the best US#1 yields of the test clones. Tubers of Adirondack Red,

Adirondack Blue, AF5245-1, AF5414-1, and AF5633-2 were very small. Dark Red Norland, AF4659-12, AF5245-

1, AF5633-2, BNC201-1, and NDAF102696C-5 had the best tuber appearance scores for the red and/or speciality

markets. Only AF5412-3 had >10% external defects incidence. Hollow heart incidence was low in this experiment

with only Adirondack Blue (4.8%) having any observed incidence.

Washed Tuber Appearance Scores for Advanced Red- and Purple-skinned Breeding Clones. Of the 2016

growing season lines tested, red- and purple skinned clones with the best washed tuber appearance ratings from

storage were: Chieftain, BNC244-10, CO098012-5, AAF08155-1, AF4659-12, AF5245-1, AF5658-2,

NDAF102696C-1, NDAF113458-2, NDAF113483B-6, and NDAF113484B-1 (Maine Table 28).

Sensory Quality Evaluation of Advanced Breeding Lines from the 2016 Growing Season. Baked sensory

evaluation results from the 2016 growing season are presented in Maine Table 29. AF4138-8, AF4985-1, AF4648-

2, AF4296-3, AF4953-6, AF5245-1, AF5280-5 had acceptable baked scores when compared to standard varieties.

AF4552-5 was the only test clone that was rated poorer than the standard varieties.

Promising Selections in the 2017 NE1231 Regional Variety Trials and Advanced Selection Trials.

Selections that performed particularly well in the 2017 Maine regional and advanced trials were:

Chipping

AF4648-2 Mid-season maturity with good yields, chip color, gravity, and bruise resistance. This clone is

common scab and PVY resistant with moderate resistance to late blight, early blight, and pink rot

AF5040-8 Mid-season, high yields, high gravity, good internal quality and chip color. Susceptible to scab.

AF5040-8 is a possible alternative to Atlantic in the South and mid-Atlantic states.

AF5429-3 Medium-late maturity, high yields, medium-high gravity, good chip color, large tubers.

Verticillium and blackspot resistance, susceptible to scab.

NY157 Mid-season maturing with fair yields, moderate gravity, and good chip color. Tuber appearance

is fair to good, but it can have some hollow heart. It has good scab resistance.

Other Promising chipping candidates that will be tested again in 2018: AF5563-2 (good yields, chip,

and gravity; moderate scab, bruise, and verticillium resistance); AF5563-5 (good yields,

appearance, and chip; moderate gravity; moderate scab and bruise resistance; B2869-29 (high

yields, good gravity and chip color, scab susceptible); B2904-2 (high yields, mid-season, high

gravity, chip color to be determined, susceptible to scab); BNC369-4 (high yields, good gravity

and chip color); WAF10664-3 (high yields, good gravity and chip color).

Fresh market whites

AF4138-8 Bright appearance with slightly netted, round to oblong tubers, excellent boiled quality, early to

mid-season maturity, moderate scab resistance, and higher yields than Superior. Size profile can

be smaller than Superior.

AF4648-2 Mid-season maturity with good yields, chip color, gravity, and bruise resistance. This clone is

common scab and PVY resistant with moderate resistance to late blight and pink rot.

Susceptibility to greening was a problem in 2015 trials, while powdery scab susceptibility was a

problem in several 2016 trials.

AF5280-5 Medium early, bright, moderate scab resistance, large tubers, good internal quality. Scab, pink

rot, bruise, and golden nematode resistance.

Other Promising fresh market whites that will be tested again in 2017: AF5225-1 (high yields, cream

flesh, verticillium and bruise resistance, scab susceptible); AF5450-7 (late maturity, high yields,

verticillium, bruise, golden nematode, and scab resistance). AF5563-5 (good yields, appearance,

and chip; moderate gravity; moderate scab and bruise resistance.

Russets or Long Whites

Caribou Russet Tested as AF3362-1. A medium-late maturing, dual-purpose russet with fair to good appearance,

long to oblong tubers, low external defects, moderate specific gravity, and good fry color. It has

high yields, moderate to large tuber size, and good internal quality (except for internal heat

necrosis in southern areas). It has moderate scab resistance and is resistant to shatter and

blackspot bruise.

Reveille Russet A long-oblong russet with moderate to high yields, good appearance, and late maturity. Specific

gravity is relatively low and fry quality is not particularly good, so it will probably be useful only

for fresh market. Emergence was were slow in the St. Agatha trial during 2016.

Teton Russet A long russet with moderate to high yields, good appearance, and good processing potential. It

has moderate scab and fusarium resistance, but is reportedly susceptible to shatter bruise and

softrot. Yields have been inconsistent in our trials. Fry quality has been good.

AF4124-7 A mid-season russet with large tuber size and good processing quality. Yield, gravity, and

internal quality have been good. It is moderately resistant to common scab, blackspot bruise, and

fusarium, but is moderately susceptible to verticillium wilt.

AF4296-3 A late maturing, russet with good fry quality, fair tuber appearance, and high yields. Specific

gravity is moderate (average of 1.079 in ME trials) and fry color from storage has been good. Fry

color uniformity is very good. It is moderately susceptible to scab, but has moderate verticillium

resistance and good bruise resistance.

AF5312-1 A mid-season russet with good appearance, flavor, and fresh market potential. Yield, gravity, and

internal quality have been good. It has resistance to scab, blackspot, shatter, and fusarium.

Other Promising russet and long-white candidates that will be tested again in 2018: AF4872-2 (russet,

good yields and excellent processing quality, some oblongs); AF5071-2 (russet, good yields and

fry quality, processing, some hollow heart and off shapes, resistant to verticillium and shatter);

AF5091-8 (russet, good yields, fry processing, externals, resistant to blackspot, pink rot,

fusarium); AF5164-19 (russet, good yields, possible dual purpose, externals, resistant to

verticillium and fusarium); AF5179-4 (russet, good yields, processing, resistant to verticillium

and fusarium); AF5406-7 (russet, good yields, processing, resistant to late blight, scab,

blackspot, shatter, verticillium, fusarium, and pink rot); AF5468-5 (russet, good yields, fresh

market, resistant to scab, fusarium, and verticillium); AAF07521-1 (russet, large tubers, good

yields, processing, resistant to late blight, blackspot, fusarium, pink rot); WAF10073-3Rus

(russet, good yields, processing, resistant to scab, blackspot, shatter, fusarium); TX08352-5Ru

(mid-season, good appearance).

Reds and Specialty

AF4659-12 A yellow-fleshed “pinto-type” specialty variety with a interesting red and yellow skin pattern. It

produces small, fingerling-type tubers that are excellent roasted, boiled, or fried.

AF4831-2 Bright red skin with a smooth, attractive skin finish, small tubers that tend to be oval to oblong,

white flesh, good cooking quality, medium to medium-late vine maturity. It has moderate

resistance to scab, verticillium wilt, and blackspot bruise. Short tuber dormancy.

AF5245-1 Purple skin, white flesh, moderate common scab resistance, small tubers

NY161 Yellow skin and flesh with purple eyes, high yields, moderate scab resistance, very pretty in 2017

Maine trials, but reportedly gets a lot of growth cracks under some conditions.

Other Promising red and specialty candidates that will be tested again in 2017: AAF08155-1 (buff skin

with a purple blush, late blight resistance); AF5412-3 (purple flesh, late blight and verticillium

resistance); AF5414-1 (reddish flesh, scab resistance, moderate late blight resistance); AF5633-2

(purple flesh, round tubers, blackspot resistance); NDAF102696C-5 (red skin, pretty, small

tubers for baby red market, moderate resistance to verticillium wilt and blackspot);

NDAF113484B-1 (red skin, pretty, small tubers for baby red market, blackspot resistance);

NDAF113458-2 (buff skin with a purple blush, high yields, bruise resistance);

Maine Table 1. Trial sites and management practices for the 2017 potato variety trials.

Site information Aroostook Central Northern

and/or Mgt. Research Maine Aroostook

Practices Farm County

Location: Presque Exeter St.

Isle Agatha

Grower Cooperator: n/a Crane Farms LaBrie Farms

Soil Test Results:

pH 5.3 6.5 5.2

P (lbs/A) 17.8 M 28.3 MH 23.5 MH

K “ 263 (4.8%, MH) 494 (8.0%, VH) 427 (5.2%, MH)

Mg “ 165 (9.6%, MH) 350 (18.3%, H) 225 (8.9%, MH)

Ca “ 951(33.5%, L) 2342 (73.8%, H) 1962 (46.6%, M)

CEC meq/100g 7.0 7.8 10.4

OM % 3.9 4.0 4.8

Previous Crop: timothy/clover corn oats w/rye undersd.

Fall Tillage: moldboard plow disk moldboard plow

Spring Tillage: disk & harrow chisel plow soil-conditioner

Planting Date: May 18 May 31 June 2

At-planting Insectic.: imidacloprid imidacloprid imidacloprid

at labeled rate at labeled rate at labeled rate

At-plant Fertilization: 175-175-175 185-150-200 not available

Other Fertilization: none 0-0-50 none

Herbicide Program: 1 qt/A Credit, PRE 1.75 pt/A Linex,PE 1.3 pt/A Parazone, PRE

0.5 lbs ai/A metrib., PE 0.38 lbs ai/A metrib., PE

Irrigation: No Yes No

Vine Desiccation: Aug. 31 (E, M, reds) Aug. 30 Sept. 15

(initial applic.) Sept. 11 (Russets)

Harvest: Sept. 13 (E/ME) Oct. 5 Oct. 3

Sept. 13 (meds, reds)

Oct. 2 (russets)

Maine Table 2. 2017 Rainfall Summary.

Month Rainfall by Location and Month (inches) 1

Presque St.

Isle Exeter Agatha1 2

May 4.51 6.30 4.78

June 4.20 4.30(0.0) 5.84

July 1.84 1.90(2.0) 1.95

August 1.74 1.60(1.0) 1.91

Sept. 5.01 2.60(0.0) 3.53

Total 17.30 16.70(3.0) 18.01

Total (June 1 to August 31) 7.78 7.80(3.0) 9.70

The Exeter site had supplemental irrigation available. The amount of supplemental irrigation applied appears in1

parentheses. The Frenchville, ME NOAA weather data was used for the St. Agatha site, since no data were2

available from the research site.

Maine Table 3. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 4 red- and purple-skinned varieties and 3early white-

skinned varieties grown at Presque Isle, Maine - 2017. (NE1231 Regional Potato Variety Trials)_______________________________________________________________________________________________________________________________________________________________________________________________________________________

Total US#1 Yield (cwt/A) % Stand 50% Size Distribution by Class (%) 1 3

Yield >1f" % of >2¼" (spacing) Emergence 1f 2¼ 2½ Spec.2

Variety cwt/A std. 6-26 Date 1 2 3 4 5 6 to 4" to 4" to 4" Grav. _______________________________________________________________________________________________________________________________________________________________________________________________________________________

Red- and Purple-skinned Clones - 105 days

Chieftain (std) 192 152 100 72 98 (10) June 10 18 43 30 8 0 0 82 39 8 1.081

DR Norland 192 162 107 101 91 (10) June 10 7 35 40 18 1 0 93 58 18 1.078

AF4831-2 149 110 72 21 92 (10) June 14 25 60 14 1 0 0 75 15 1 1.078

AF5245-1 181 154 101 71 98 (10) June 10 14 47 31 8 0 0 86 39 8 1.092

White-skinned Clones - 105 days

Superior (std) 170 139 100 86 94 (10) June 10 6 37 40 14 3 0 94 57 17 1.091

AF4138-8 163 121 87 47 95 (10) June 12 19 49 27 5 1 0 81 33 6 1.075

AF5280-5 171 139 100 66 98 (10) June 8 12 46 33 9 0 0 88 42 9 1.081

W. Duncan LSD 52 45 31 7 16 9 0.004 _______________________________________________________________________________________________________________________________________________________________________________________________________________________

U.S.#1 yield = yield 1f to 4" excluding external defects.1

Inches between seedpieces noted within parentheses.2

Size classes: 1=1½ to 1f"; 2=1f to 2¼"; 3=2¼ to 2½"; 4=2½ to 3¼"; 5=3¼ to 4"; 6=over 4". 3

Maine Table 4. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip colors for 4 red- and purple-skinned varieties and 3 early

white-skinned varieties grown at Presque Isle, Maine - 2017. (NE1231 Regional Potato Variety Trials)________________________________________________________________________________________________________________________________________________________________________________________________________________________

Plant Data Skinning Tuber Data Tuber Defects (%) Percent 1 1

Variety Size Maturity & Shatter Flesh Skin Appear- Sun- Mis- Growth Hollow Chip

8-8 8-17 @VK Index %Crck. Color Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color 4 4 5 6 2 3

ture ________________________________________________________________________________________________________________________________________________________________________________________________________________________

Red- and Purple-skinned Clones - 105 days

Chieftain (std) 8 5 5.0 1.36 16 MR Wh 7 rz 3 5 pmr 3.3 0.0 2.1 1.0 0.0(0) 0.3 0.0 69(2.5)

DR Norland 6# 4 3.3 1.43 48 MS OW 7 grc,rz 3 nu 6 mbr 9.6 0.3 4.5 4.7 0.0(0) 0.1 0.0 70(1.5)

AF4831-2 8* 6 6.0 2.47 22 MR Wh 8 rz 3 6 mbr 3.4 0.0 1.5 1.8 0.0(0) 0.1 0.0 71(2.8)

AF5245-1 7# 4 4.0 1.06 61 S OW 7 3 6 mpur 1.4 0.0 0.7 0.7 0.0(0) 0.0 0.0 70(1.0)

White-skinned Clones - 105 days

Superior (std) 7# 4 4.3 1.31 66 S OW 6 cn 3 nu 5 rz 13.6 0.4 4.9 0.7 7.6(1) 0.0 13.6 70(1.0)

AF4138-8 6H1 4 4.3 1.66 39 MS OW 6 2 6 rz 8.7 0.0 2.1 2.5 4.0(1) 0.2 0.0 68(1.2)

AF5280-5 6# 4 4.0 1.04 23 MR Wh 7 2 6 7.6 0.4 2.7 0.9 3.7(1) 0.0 3.3 73(1.0)_____________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; mpur=medium purple skin; ppk=pale pink skin; pk=pink to pale red skin; lmr=light medium red skin;1

mr=medium-red skin; mdr=medium dark red skin; mbr=medium bright red skin; br=bright red skin; dr=dark red skin; pr=some pear-shaped tubers; pch=pink

skin patches; rz=black scurf; sbd=severe black dot; mbd=moderate black dot; bd!=severe black dot; ss=silver scurf; yl=yellow skin color; de=deep eyes; fl=flat

tubers; rs=russet scab; nu=nonuniform skin; cs=pretty except for scab problem; le=enlarged lenticels; cr=skin cracks. # indicates very good early vigor while

** and *=severe or moderate early vigor problems; H2=slight to moderate herbicide injury noted on June 22; H3=moderate herbicide injury; H4=moderate to

severe herbicide injury.

Percent hollow heart is based on 10 large tubers per plot when available (40 tubers per clone). 2

Chip color from 45 and 50F -- Agtron M35 (higher values indicate lighter color): >62 acceptable. The chipping date was December 1, 2017. Waller Duncan3

LSD (K=100) for chip color = 2.0. A stem-end defect score is presented in parenthesis (1=good; 2=fair; 3=poor), LSD (K=100) for stem end = 0.7.

Index measures combined skinning and shatter bruise susceptibility measured on September 18, 2017 (5 days after harvest). Data presented represent indices4

where: 0=all tubers have 0% of surface affected and 9=all tubers have 100% of surface affected. Percentage of tubers with air or thumbnail cracks is reported

(S=susceptible, MS=moderately susceptible, MR=moderately resistant).

Flesh color: Wh=white; OW=off-white; PurM=purple with white; PkM=pink with white; YF=yellow-fleshed where higher number indicates brighter yellow5

color.

Common and powdery scab were present in this experiment. 6

Maine Table 5. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 14 medium and late-maturing varieties grown at

Presque Isle, Maine - 2017. (NE1231 Regional Potato Variety Trials)_______________________________________________________________________________________________________________________________________________________________________________________________________________________




Medium Test- 105 days

Atlantic (std) 169 142 100 90 91 (10) June 14 6 34 35 21 3 1 93 59 24 1.098

Katahdin 169 139 98 73 94 ( 8) June 14 13 40 27 18 1 0 87 47 20 1.087

Kennebec 182 150 106 111 97 ( 8) June 10 6 24 34 33 2 0 94 69 35 1.084

Snowden 117 74 52 41 82 (12) June 17 21 36 30 13 1 0 79 43 14 1.093

Yukon Gold 201 174 122 108 95 ( 8) June 10 6 36 41 16 1 0 94 58 17 1.095

AF4552-5 171 139 98 49 95 (10) June 12 14 55 23 8 0 0 86 30 8 1.090

AF4648-2 177 141 99 32 100 ( 8) June 10 19 63 16 2 0 0 81 18 2 1.097

AF5040-8 173 141 99 46 95 (10) June 10 16 57 23 4 0 0 84 27 4 1.092

AF5225-1 201 135 95 16 97 (10) June 8 32 61 7 0 0 0 68 8 0 1.094

AF5429-3 208 177 125 87 96 (10) June 8 12 45 30 13 0 0 88 43 13 1.102

B2904-2 201 158 111 75 99 (10) June 8 13 46 34 7 0 0 87 41 7 1.111

BNC364-1 179 151 106 60 92 (10) June 12 13 52 29 6 0 0 87 35 6 1.099

NY157 162 136 96 49 98 (10) June 12 15 55 25 5 0 0 85 30 5 1.093

NY161 203 152 107 31 98 (10) June 14 24 61 13 2 0 0 76 15 2 1.090

W-D LSD (k=100) 29 25 21 4 10 9 0.003 _______________________________________________________________________________________________________________________________________________________________________________________________________________________




Maine Table 6. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 12 medium and late-maturing varieties

grown at Presque Isle, Maine - 2016. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________

Plant Data Tuber Data Tuber Defects (%) Percent 1 1

Variety Size Maturity Skinning Flesh Skin Appear- Sun- Mis- Growth Hollow Chip

8-8 8-17 @VK & Shatter Color Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color 5 6 2 3

Index %Crck. ture 4 4

______________________________________________________________________________________________________________________________________________________________________________________________________________________

Medium Test - 105 days

Atlantic (std) 8# 6 5.8 1.36 58 S OW 5 rz 2 5 de 9.7 0.2 5.9 3.0 0.5 (1) 0.3 25.0 70(1.0)

Katahdin 7 6 6.5 3.25 16 MR OW 8 rz 3 6 5.5 0.2 2.4 2.6 0.1 (1) 0.2 0.0 69(1.0)

Kennebec 8# 5 5.3 3.18 55 S Wh 7 rz 5 nu 5 grc 12.8 0.4 6.1 6.1 0.0 (0) 0.2 0.0 71(1.0)

Snowden 7* 6 5.5 1.84 68 S OW 5 rs 3 nu 4 de 19.7 1.5 15.2 2.6 0.2 (1) 0.3 9.1 70(1.0)

Yukon Gold 8 5 4.0 1.18 23 MR YF2 7 yl, rz 3 6 pkeye 7.2 0.1 4.1 3.1 0.0 (0) 0.0 0.0 70(1.0)

AF4552-5 8# 5 4.3 1.29 29 MR Wh 5 rz, cn 2 5 de 5.3 0.3 3.8 1.1 0.0 (0) 0.0 0.0 70(1.0)

AF4648-2 7#H1 5 5.0 1.38 22 MR OW 7 3 7 1.7 0.2 1.1 0.5 0.0 (0) 0.0 0.0 72(1.0)

AF5040-8 8# 4 3.8 1.29 33 MS OW 7 rz 2 6 3.2 0.1 1.5 1.5 0.0 (0) 0.1 0.0 72(1.0)

AF5225-1 9# 7 6.3 1.69 0 R YF1 7 3 6 1.9 0.0 0.9 0.9 0.0 (0) 0.1 0.0 70(1.0)

AF5429-3 8# 6 5.8 2.00 29 MR OW 7 3 6 3.4 0.1 2.1 1.0 0.0 (0) 0.2 0.0 72(1.0)

B2904-2 9# 6 6.0 1.56 33 MS OW 5 cn 3 nu 5 de 8.6 0.0 6.6 1.9 0.0 (0) 0.0 0.0 63(2.0)

BNC364-1 6H1 5 4.8 2.11 46 MS OW 7 rz 5 6 pureye 2.8 0.7 0.3 1.3 0.4 (1) 0.2 0.0 72(1.0)

NY157 7# 5 4.3 1.76 59 S OW 6 rz 3 5 1.7 0.0 1.1 0.6 0.0 (0) 0.0 0.0 71(1.0)

NY161 8# 6 4.8 1.10 35 MS YF2 7 yl 2 7 pureye 1.8 0.0 1.0 0.7 0.0 (0) 0.1 0.0 70(1.0)______________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; pr=some pear-shaped tubers; pch=pink skin patches; yl=yellow skin color; de=deep eyes or dented apical1

or stem end; fl=flat tubers; rs=russet scab; rz=rhizoctonia; nu=nonuniform skin; cs=pretty except for scab problem; le=enlarged lenticels; cr=skin

cracks. bd=black dot. # indicates very good early vigor while ** and *=severe or moderate early vigor problems; H2=slight to moderate herbicide

injury noted on June 22; H3=moderate herbicide injury; H4=moderate to severe herbicide injury.

Percent hollow heart is based on ten large tubers per plot (40 per clone). 2



Index measures combined skinning and shatter bruise susceptibility measured on September 19, 2017 (6 days after harvest). Data presented represent indices4

where: 0=all tubers have 0% of surface affected and 9=all tubers have 100% of surface affected. Percentage of tubers with air and/or thumbnail cracks

is reported (S=susceptible, MS=moderately susceptible, MR=moderately resistant, R=resistant).

Flesh color: Wh=white; OW=off-white; YF=yellow-fleshed where higher number indicates brighter yellow color.5


Maine Table 7. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 9 russeted/processing varieties grown at Presque

Isle, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________


Yield >1f" % of > (spacing) Emergence Size Class > > by length Spec.2

Variety cwt/A std. 4 oz. 6-26 Date 1 2 3 4 5 8 oz 12 oz. >3" >3½" Grav.______________________________________________________________________________________________________________________________________________________________________________________________________________________

Russet/Processing Test - 118 days

Russet Burbank (std) 180 144 100 92 80 (16) June 17 37 42 18 2 1 22 3 56 37 1.081

Caribou Russet 294 292 203 198 100 (16) June 8 33 57 8 2 0 10 2 65 33 1.091

Reveille Russet 276 267 185 164 90 (16) June 19 41 50 8 1 0 9 1 56 27 1.081

Russet Norkotah 145 143 99 68 91 (16) June 15 54 40 6 1 0 7 1 50 27 1.077

Shepody 209 194 135 136 95 (16) June 10 31 49 17 2 1 20 3 63 37 1.089

Teton Russet 220 198 138 114 98 (16) June 12 46 43 7 3 1 11 4 42 20 1.085

AF4296-3 200 185 128 116 100 (16) June 12 39 55 6 1 0 7 1 67 36 1.089

ND8068-5Rus 185 140 97 70 100 (16) June 8 51 44 4 1 0 4 1 48 16 1.093

TX08352-5Ru 205 200 139 59 98 (16) June 14 71 29 0 0 0 0 0 31 7 1.074

Waller-Duncan

LSD (k=100) 32 30 37 10 5 13 11 0.003 ______________________________________________________________________________________________________________________________________________________________________________________________________________________

U.S.#1 yield = yield >1f " excluding tubers with sunburn, severe misshapes, growth cracks, scab, and rot. 1


Size classes: 1= <4 oz; 2=4 to 8 oz.; 3=8 to 12 oz.; 4=12 to 16 oz.; 5= >16 oz.3

Maine Table 8. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip colors for 9 russeted/processing varieties grown at

Presque Isle, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________





______________________________________________________________________________________________________________________________________________________________________________________________________________________

Russet/Processing Test - 118 days

Russet Burbank (std) 8* 6 5.3 1.54 39MS OW 4 rz 7 nu 5 kn 20.0 1.4 16.4 2.2 0.0(0) 0.1 0.0 62(2.2)

Caribou Russet 8# 6 6.0 1.42 29MR OW 4 cn 7 blky 6 0.7 0.5 0.0 0.1 0.0(0) 0.1 0.0 64(2.0)

Reveille Russet 7*H1 6 5.5 1.88 18MR OW 4 6 6 3.7 0.9 0.0 2.6 0.0(0) 0.1 0.0 63(2.2)

Russet Norkotah 6* 2 3.0 1.07 7R OW 3 rz 7 6 1.5 0.8 0.0 0.6 0.0(0) 0.0 n/a 58(2.0)

Shepody 8H1 4 4.3 1.07 37MS Wh 7 7 nu 5 6.7 1.1 4.7 0.9 0.0(0) 0.1 0.0 67(2.0)

Teton Russet 7* 4 3.3 1.00 69S OW 4 rz 6 nu 6 10.1 0.7 7.3 2.0 0.0(0) 0.2 0.0 65(2.0)

AF4296-3 8 5 4.8 3.68 15MR Wh 4 rz,cn 7 nu 5 7.8 0.2 6.7 0.8 0.0(0) 0.2 0.0 65(1.5)

ND8068-5Rus 6# 1 1.0 1.26 18MR OW 4 7 5 grc 24.4 0.0 1.4 21.5 1.4(1) 0.1 n/a 66(1.0)

TX08352-5Ru 7 2 2.8 1.00 52S OW 3 6 6 2.2 0.2 1.3 0.5 0.0(0) 0.3 n/a 54(2.8)______________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; pr=some pear-shaped tubers; pch=pink skin patches; yl=yellow skin color; de=deep eyes; fl=flat tubers;1

rs=russet scab; nu=nonuniform skin or shape; wh=white skin, not russeted; blky=blocky, cs=pretty except for scab problem; le=enlarged lenticels; cr=skin

cracks; cl=tubers cling to stolons, bs=black scurf. # indicates very good early vigor while ** and *=severe or moderate early vigor problems; H2=slight to

moderate herbicide injury noted on June 13; H3=moderate herbicide injury; H4=moderate to severe herbicide injury.

Percent hollow heart is based on ten large tubers per plot, when available (40 tubers per clone).2



Skinning and shatter bruise were measured on October 3, 2017 (1 day after harvest). Data presented represent indices where: 1=all tubers have 0% of surface4

affected and 9=all tubers have 100% of surface affected. Percentage of tubers with air and/or thumbnail cracks is reported (S=susceptible, MS=moderately

susceptible, MR=moderately resistant).


Common and powdery scab were present in this experiment6

Maine Table 9. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 16 varieties and clones grown at Exeter, Maine -

2017. (NE1231 Regional Potato Variety Trial)

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Total US#1 Yield (cwt/A) % Stand Size Distribution by Class (%) 1 3

Yield >1f" % of >2¼" (spacing) 1f 2¼ 2½ Spec.2

Variety cwt/A std. 7-7 1 2 3 4 5 6 to 4" to 4" to 4" Grav.

______________________________________________________________________________________________________________________________

Central ME Regional Test- 95 days

Atlantic (std) 403 156 100 142 98 (10) 1 8 20 53 16 2 97 89 69 1.088

Katahdin 286 45 29 40 93 ( 8) 3 11 23 48 13 2 95 85 61 1.065

Kennebec 366 39 25 37 92 ( 8) 2 6 12 55 18 7 91 86 74 1.068

Snowden 304 109 70 90 100 (12) 3 16 30 40 9 1 96 80 49 1.084

Superior 369 172 110 154 98 (10) 1 11 30 45 11 2 97 87 57 1.078

Yukon Gold 342 71 46 67 97 ( 8) 1 6 19 54 19 1 98 92 73 1.080

AF4138-8 342 288 185 214 98 (10) 6 24 37 31 1 0 94 70 33 1.065

AF4552-5 373 295 189 267 99 (10) 1 9 28 51 10 1 98 89 61 1.083

AF4648-2 269 208 133 184 86 ( 8) 2 11 25 49 11 1 96 85 60 1.079

AF5040-8 349 138 89 111 100 (10) 3 20 38 39 0 0 97 77 39 1.083

AF5280-5 423 366 235 339 100 (10) 1 7 27 56 8 0 99 91 65 1.064

AF5429-3 371 97 62 85 97 (10) 2 13 26 45 12 2 96 84 57 1.079

B2869-29 392 168 108 98 99 (10) 8 40 40 12 1 0 92 52 13 1.089

B2904-2 377 161 103 117 98 (10) 4 25 39 29 2 0 96 70 31 1.090

BNC364-1 321 69 44 57 95 (10) 3 19 36 39 3 0 97 78 42 1.068

NY157 334 238 152 215 95 (10) 2 9 24 52 11 1 96 87 62 1.082

Waller Duncan

LSD (k=100) 47 45 39 4 5 7 0.005______________________________________________________________________________________________________________________________________________________________________________________________________________________




Maine Table 10. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 16 varieties and clones grown at

Exeter, Maine - 2017. (NE1231 Regional Potato Variety Trial)

_______________________________________________________________________________________________________________________________


Variety Size Maturity Skinning Skin Appear- Sun- Mis- Growth Hollow Chip

7-21 8-28 @VK & Shatter Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color2 3

Index %Crck ture 4 4

______________________________________________________________________________________________________________________________________________________________________________________________________________________

Central ME Regional Test- 95 days

Atlantic (std) 8 6 6.5 1.57 73 S 5 3 5 cs,csp 60.0 6.8 0.6 1.8 50.7(2) 0.0 12.5 70(1.2)

Katahdin 5 7 6.5 1.82 20MR 7 3 fl 4 cs 83.9 10.2 0.8 2.8 69.2(4) 0.9 3.2 66(1.5)

Kennebec 6 6 6.8 1.86 47S 7 5 nu 2 cs 88.9 17.9 6.6 2.1 62.3(5) 0.0 15.0 67(1.8)

Snowden 6H1 7 6.8 1.60 71S 5 de 3 4 cs,csp 62.9 3.7 2.0 0.1 57.1(4) 0.0 0.0 71(1.0)

Superior 7 4 5.5 1.87 90VS 6 4 nu 4 cs,csp 51.1 4.9 4.4 2.3 38.7(3) 0.7 10.0 70(1.5)

Yukon Gold 7 6 6.8 1.82 61S 7 pe 4 5 cs,csp 78.6 7.3 0.9 0.9 69.4(4) 0.0 2.5 61(2.0)

AF4138-8 6 5 6.0 1.48 72S 6 2 6 10.4 0.8 0.0 0.7 8.7(1) 0.2 0.0 68(1.2)

AF4552-5 8 6 5.8 1.11 59S 5 2 5 19.0 0.9 0.0 0.5 17.2(2) 0.4 0.0 69(1.2)

AF4648-2 7H1 7 7.0 3.38 50S 7 4 6 19.4 12.2 2.3 0.3 4.5(1) 0.0 0.0 73(1.0)

AF5040-8 8 5 6.3 1.46 48S 7 3 4 cs,csp 59.8 4.1 1.2 0.4 54.1(4) 0.0 0.0 74(1.0)

AF5280-5 8H0.5 4 4.3 1.37 59S 6 3 6 12.1 2.4 2.4 0.2 7.2(1) 0.0 0.0 74(1.0)

AF5429-3 7 6 6.3 1.79 80S 7 3 5 cs,csp 73.1 4.5 0.7 0.4 67.5(4) 0.1 2.5 75(1.0)

B2869-29 7 5 5.8 1.05 71S 6 de 2 5 cs,csp 53.5 1.1 0.1 0.4 51.7(2) 0.2 5.0 70(1.0)

B2904-2 7H0.5 6 6.3 1.48 75S 5 3 5 cs,csp 55.7 0.5 1.5 0.8 52.9(3) 0.0 5.0 68(1.0)

BNC364-1 6 6 6.0 4.83 74S 7 grc 5 3 cs,csp 77.8 4.4 0.0 12.6 59.7(4) 1.1 0.0 72(1.0)

NY157 8 6 5.5 2.35 83S 5 3 5 24.1 1.9 0.3 1.0 20.2(2) 0.6 0.0 72(1.0)______________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; mbr=medium bright red skin; pr=some pear-shaped tubers; pe=pink eyes; pch=pink skin patches;1

yl=yellow skin color; de=deep eyes; fl=flat tubers; rs=russet scab; nu=nonuniform skin or shape; csp=scab problems, some pitted; cs=scab problems;

le=enlarged lenticels; de=deep eyes or deeply indented apical or stem end; cl=tubers cling to stolons . Scab severity rating (1 rep only, p=pitted): 0=none;

3=moderate; 5=severe. # indicates very good early vigor while ** and *=severe or moderate early vigor problems. H1,H2, H3 = slight, moderate, severe

chlorotic herbicide injury noted on June 22.

Percent hollow heart is based on ten large tubers per plot (40 tubers per clone). 2




affected and 9=all tubers have 100% of surface affected. Percentage of tubers with air and/or thumbnail cracks is reported (S=susceptible,

MS=moderately susceptible, MR=moderately resistant, R=resistant).

Maine Table 11. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 20 round-white and red-skinned varieties and

NE1231 regional trial clones grown at St. Agatha, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________



Variety cwt/A std. 7-5 1 2 3 4 5 6 to 4" to 4" to 4" Grav. ______________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha NE1231 Round-whites and Reds - 105 days

Round-whites:

Atlantic (std) 306 282 100 245 96 (10) 3 13 25 49 9 0 97 83 58 1.089

Katahdin 281 174 62 139 92 ( 8) 5 19 31 36 7 1 94 75 44 1.075

Kennebec 280 195 69 160 98 ( 8) 4 17 27 44 9 0 96 79 52 1.072

Snowden 228 141 50 73 94 (12) 10 41 32 15 2 0 90 49 17 1.090

Superior 213 149 53 106 97 (10) 6 27 31 30 7 0 94 68 37 1.079

Yukon Gold 266 197 70 163 91 ( 8) 3 17 32 41 7 0 97 80 49 1.084

AF4138-8 246 143 51 80 100 (10) 12 40 36 12 0 0 88 48 12 1.072

AF4552-5 309 280 99 199 97 (10) 5 27 36 28 3 0 95 67 31 1.083

AF4648-2 309 267 95 196 99 ( 8) 4 26 42 26 2 0 96 70 28 1.084

AF5040-8 277 152 54 79 100 (10) 9 42 33 12 3 1 90 48 15 1.088

AF5225-1 342 309 110 198 95 (10) 8 33 36 22 1 0 92 59 23 1.070

AF5280-5 228 169 60 105 98 (10) 5 35 35 23 2 0 95 60 25 1.073

AF5429-3 289 196 70 166 91 (10) 3 15 31 39 11 1 96 81 50 1.084

BNC364-1 253 152 54 110 89 (10) 6 26 37 29 1 0 94 68 31 1.082

NY157 291 264 94 158 97 (10) 7 38 34 21 0 0 93 55 21 1.084

NY161 378 339 120 228 99 (10) 8 30 42 18 2 0 92 62 20 1.072

Reds:

Chieftain (std) 286 266 100 182 100 (10) 7 30 39 24 0 0 93 64 24 1.072

Norland, DR 226 197 74 139 98 (10) 7 27 38 27 1 0 93 66 27 1.063

AF4831-2 245 204 77 110 99 (10) 11 40 35 12 1 0 89 48 13 1.067

AF5245-1 206 177 66 100 97 (10) 13 39 29 19 1 0 87 49 20 1.075

Waller Duncan

LSD (k=100) 50 69 70 2 8 10 0.005______________________________________________________________________________________________________________________________________________________________________________________________________________________




Maine Table 12. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 20 round-whites and red-skinned

varieties and NE1231 regional trial clones grown at St. Agatha, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________



8-8 9-5 @VK & Shatter Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color 5 2 3


______________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha NE1231 Round-whites and Reds - 105 days

Round-whites:

Atlantic (std) 7 6 5.8 1.95 48MS 5 2 5 4.4 1.8 1.4 0.5 0.7(1) 0.0 0.0 65(2.2)

Katahdin 7 6 6.0 3.69 19MR 6 2 fl 6 cs 30.1 3.6 3.1 0.9 22.5(1) 0.0 2.5 n/a

Kennebec 7 5 4.8 3.12 72S 7 4 nu 5 cs 26.3 3.5 5.9 1.2 15.7(2) 0.0 2.5 59(2.0)

Snowden 8 5 4.8 1.00 62S 5 cs 2 dull 4 de 26.1 2.4 1.9 0.8 21.0(4) 0.0 0.0 67(1.0)

Superior 7 3 3.0 1.25 92VS 6 3 6 cs 22.7 1.4 1.6 0.3 19.3(1) 0.1 2.5 n/a

Yukon Gold 8 4 4.0 1.29 75S 6 pke 3 6 cs 21.8 1.2 3.8 2.5 14.0(2) 0.4 0.0 n/a

AF4138-8 6 3 3.8 1.21 67S 6 2 5 32.9 0.7 0.6 0.8 30.6(3) 0.1 0.0 n/a

AF4552-5 8 5 5.0 1.17 70S 5 2 5 4.4 1.4 1.6 1.2 0.3(1) 0.0 0.0 64(1.2)

AF4648-2 7 6 6.0 1.19 80S 6 2 6 10.0 6.6 1.3 0.1 2.0(1) 0.0 0.0 65(1.0)

AF5040-8 7 4 4.0 1.00 48MS 7 2 5 cs 37.1 0.9 0.7 0.2 35.2(4) 0.1 0.0 69(1.0)

AF5225-1 8 6 6.0 2.33 0R 6 2 6 0.8 0.2 0.3 0.1 0.2(1) 0.0 0.0 n/a

AF5280-5 7 3 3.8 1.00 54S 7 3 5 20.7 1.2 2.3 0.2 17.0(3) 0.1 0.0 69(1.0)

AF5429-3 8 5 5.5 1.74 80S 7 2 6 cs 29.1 3.4 1.6 0.1 23.7(2) 0.2 0.0 69(1.0)

BNC364-1 5 4 4.3 1.95 86S 7 5 3 cs 33.1 0.8 0.7 1.0 30.5(4) 0.0 2.5 n/a

NY157 7 5 5.0 1.33 78S 6 dull 2 5 2.5 0.6 1.4 0.3 0.2(1) 0.1 0.0 68(1.0)

NY161 8 6 5.0 1.85 96VS 7 purey 2 7 2.9 0.6 1.4 1.0 0.0(0) 0.0 0.0 n/a

Reds:

Chieftain (std) 8 4 4.0 1.06 68S 7 dull 3 5 pmr 0.3 0.1 0.2 0.0 0.0(0) 0.0 0.0 n/a

Norland, DR 7 3 2.8 1.06 85S 6 grc 3 5 mbr 6.5 0.1 0.4 6.0 0.0(0) 0.0 0.0 n/a

AF4831-2 8 5 4.3 1.62 82S 7 3 6 mbr 6.3 0.9 1.4 1.8 2.1(1) 0.0 5.0 n/a

AF5245-1 7 3 4.0 1.00 99VS 7 2 7 mpur 1.8 0.7 0.4 0.6 0.0(0) 0.0 0.0 n/a

_____________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; pke=pink at eyes, ppk=pale pink skin; pk=pink to pale red skin; pr=pale red; lmr=light medium red skin;1

mr=medium-red skin; br=bright red skin; dr=dark red skin; ptd=pointed tuber shape; pr=some pear-shaped tubers; pke=pink at eye; purey=purple at eye;

pch=pink skin patches; yl=yellow skin color; de=deep eyes or dented apical and/or stem end; fl=flat tubers; rs=russet scab; nu=nonuniform skin or shape;

cr=skin cracking or checking; cs=pretty except for scab problem; le=enlarged lenticels; brght=bright appearance; mpur=medium purple skin. # indicates very

good early vigor while ** and *=severe or moderate early vigor problems;

Percent hollow heart is based on 10 large tubers cut per plot, when available (40 tubers per variety). 2


LSD (K=100) for chip color = 3.5. A stem-end defect score is presented in parenthesis (1=good; 2=fair; 3=poor), LSD (K=100) for stem end =0.7.




Both common and powdery scab were present in this experiment.5

Maine Table 13. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 9 russet/processing (long-tuber-type) varieties

and NE1231 regional trial clones grown at St. Agatha, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________


Yield >1f" % of > (spacing) Size Class > > by length Spec.2

Variety cwt/A std. 4 oz. 7-5 1 2 3 4 5 8 oz 12 oz. >3" >3½" Grav.______________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha NE1231 Russet/processing Test- 105 days

Russet Burbank (std) 310 250 100 205 88 (16) 18 35 26 13 8 47 21 75 59 1.073

Caribou Russet 424 417 167 376 99 (10) 10 49 30 8 3 41 11 87 68 1.079

Reveille Russet 356 333 133 291 94 (12) 13 49 29 6 3 38 10 84 63 1.068

Russet Norkotah 227 219 88 149 96 (12) 32 54 13 1 0 14 1 73 50 1.071

Shepody 278 221 88 175 89 (10) 21 46 23 8 3 33 10 78 63 1.073

Teton Russet 395 351 140 303 99 (14) 14 41 32 12 1 45 13 77 60 1.075

AF4296-3 317 305 122 257 100 (14) 16 48 27 8 2 37 10 88 73 1.078

ND8068-5Rus 219 177 71 111 100 (12) 38 53 7 3 0 9 3 60 34 1.077

TX08352-5Ru 313 310 124 226 100 (12) 28 61 10 0 0 11 0 66 39 1.063

Waller Duncan LSD (k=100) 39 44 48 10 7 7 9 0.007 ______________________________________________________________________________________________________________________________________________________________________________________________________________________




Maine Table 14. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 9 russet/processing (long-tuber-type)

varieties and clones grown at St. Agatha, Maine - 2017. (NE1231 Regional Potato Variety Trials)______________________________________________________________________________________________________________________________________________________________________________________________________________________



8-8 9-5 @VK & Shatter Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color 5 2 3

Index %Crcks ture 4 4

______________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha NE1231 Russet/processing Test - 105 days

Russet Burbank (std) 7 7 7.0 5.30 20MR 4 7 nu 4 kn 19.7 4.5 12.3 2.7 0.2(1) 0.0 0.0 45(2.5)

Caribou Russet 8 6 6.5 3.94 19MR 4 cn 7 6 1.6 0.5 0.0 1.1 0.0(0) 0.0 0.0 52(2.5)

Reveille Russet 6 6 6.8 7.06 11MR 4 6 blky 5 6.4 5.0 0.8 0.4 0.0(0) 0.2 0.0 34(3.0)

Russet Norkotah 6 4 4.0 2.41 27MR 3 7 6 3.0 1.4 1.1 0.4 0.0(0) 0.0 0.0 49(2.5)

Shepody 6 5 4.8 1.69 33MS 7 7 5 cs 20.1 2.6 0.2 0.3 16.8(1) 0.1 0.0 52(2.5)

Teton Russet 7 6 6.0 3.11 20MR 4 6 obls 5 11.2 8.0 0.7 2.4 0.0(0) 0.0 0.0 50(2.2)

AF4296-3 7 6 5.8 5.67 39MS 3 7 5 3.7 2.5 0.9 0.2 0.2(1) 0.0 0.0 60(1.2)

ND8068-5Rus 5 3 2.5 1.57 56S 4 grc 6 6 cs 19.7 0.4 0.0 9.4 9.9(1) 0.0 0.0 55(1.8)

TX08352-5Ru 7 6 5.5 2.64 59S 3 cn 6 obls 6 0.7 0.5 0.0 0.3 0.0(0) 0.0 0.0 40(3.0)______________________________________________________________________________________________________________________________________________________________________________________________________________________

See standard NE1231 rating system for key to codes; nr=nonuniform russeting; ptd=pointed tuber shape; pr=pear-shaped tubers; le=enlarged lenticels;1

stl=stolons cling to tops; wh=white-skinned; cr=skin cracks; pe=pink at eye; and rs=russet scab.

Percent hollow heart is based on 10 large tubers cut per plot when available (40 tubers per variety).2

Chip color from 50F -- Agtron M35 (higher values indicate lighter color): >62 acceptable. The chipping date was December 12, 2017. Waller Duncan LSD3

(K=100) for chip color = 5.9. A stem-end defect score is presented in parenthesis (1=good; 2=fair; 3=poor), LSD (K=100) for stem end = 0.9.

Skinning and shatter bruise were measured on October 5, 2017 (2 days after harvest). Data presented represent indices where: 0=all tubers have 0% of surface4



Both common and powdery scab were observed in this experiment.5

Maine Table 15. French fry color and uniformity ratings for nine potato clones and varieties grown at Presque Isle and St. Agatha, Maine during 20171

(NE1231 Trials).

Aroostook Research Farm, Presque Isle, ME St. Agatha, ME

Fry % Fry Uniformity Fry % Fry Uniformity 3 3

Color OO % Dk. Color OO % Dk.

Variety Index & O %VG %G Ends Overall Notes Index & O %VG %G Ends Overall Notes 2 2 4 2 2 4

Russet Burbank (std) 1.08 10 68 92 5 fair col, vde 1.65 5 22 100 0 F-P col

Caribou Russet 0.68 69 45 80 18 fair vde 0.85 35 12 75 25 F-P col,vde

Reveille Russet 0.94 42 25 92 8 F-P col, vde 2.32 2 5 55 38 poor col,vde

Russet Norkotah 1.16 18 48 98 2 fair col 1.18 30 38 88 12 fair col,vde

Shepody 0.68 70 50 100 0 good 0.70 62 48 90 5 F-P sl nu

Teton Russet 0.61 78 52 100 0 good 1.22 20 50 75 8 fair col, nu

AF4296-3 0.24 100 80 95 0 good sl nu 0.23 100 62 98 0 good sl gr

ND8068-5Russ 0.15 100 92 100 0 VG 0.36 92 75 82 10 F-G vde, nu

TX08352-5Ru 1.48 2 25 90 2 poor col, nu 2.40 0 22 60 35 poor col, nul

W-D LSD (k=100) 0.30 28 26 ns ns 0.47 28 31 25 20

Center raw tuber slabs were cut from each of ten tubers. The raw slabs were fried at 375 F for 3.5 minutes, placed on a papers towel, and fry color was rated1 o

after the slices had cooled slightly. All tuber samples were stored at 50 F, 85% R.H. from harvest until processing. Frying and evaluation dates were Decembero

12 (Presque Isle) and 13 (St. Agatha).

Color Grades are from the USDA color standards chart #64-1, third edition. A weighted fry color index was calculated where 0.1=all slices were very light,2

USDA category OO and 4.0=all slices were very dark, USDA category #4. Lower indices indicate lighter color. Percentage of slices rating USDA category 0

or lighter is listed (percentage of 40 slices rated).

Fry slices were rated for color uniformity. %VG = percentage of slices out of 40 that were rated very uniform. %G= percentage of slices that were rated very3

uniform to having only slight stem end defects. %Dk. Ends = percentage of slices that had moderate to severe stem-end defects.

Notes: vde=very dark ends; sed=stem end defects; nu=non-uniform color, blotchy; col=dark fry color; sl gr = some slices with slight graying; gre = gray ends.4

Maine Table 16. French fry color and texture of selected potato clones and varieties under simulated processing conditions . All varieties were grown at1

Aroostook Research Farm, Presque Isle, Maine during 2016.

Color Grade Grayness Mealiness Comments Overall2 3 4 5

Variety Rating Index %Dark %Unif Index Index Rating6

Russet Burbank (std) 000-2 0.48 3 85 4.00 4.09 Std

Caribou Russet (AF3362-1) 000-1 0.46 0 60 4.00 3.50 Nu -

Reveille Russet 0-2 1.64 67 100 3.95 3.60 Dk -

Russet Norkotah 00-2 0.68 5 66 4.00 3.56 o

Shepody 00-2 0.69 5 46 4.00 4.24 Nu -

Teton Russet 000-2 0.47 3 71 3.86 4.03 o

AF4296-3 000-1 0.42 0 89 3.95 3.89 o

AF4615-5 00-2 0.59 5 38 3.67 3.73 Gr, Nu, Sh -

AF4953-6 000-2 0.75 9 43 3.93 3.25 Tx, Nu, Dk -

Waller Duncan LSD (k=100) 0.24 11 25 0.18 0.61

Two center raw tuber slices were cut from each of ten tubers. The slices were rinsed in cool water, blanched for 8 minutes at 170 F, par-fried at 375 F for 801 o o

seconds, and quick frozen at -30 C in plastic bags. Four such replications were processed in February 2017 and held at -15 F until evaluation. Prior too o

evaluation, samples were finish-fried at 375 F for 1-3/4 minutes on April 6, 2017, blotted dry with a paper towel, and cooled for 6 minutes. Processing waso

done at the School of Food and Agriculture, University of Maine, Orono, ME (We appreciate the help of Dr. Mary Ellen Camire and her staff). All tuber

samples were stored at 50 F, 85% R.H. from harvest until processing. Percent dark = the percentage of fries that were rated in the 2 category or darker aftero

processing (out of 80 slices representing 40 tubers).

Color Grades are from USDA color standards chart #64-1, third edition. Lower indices indicate lighter color.2

Grayness indices represent weighted means derived from the following evaluation scale: 4 = no graying; 3 = slight graying; 2 = moderate graying; 1 = intense3

graying.

Mealiness indices represent weighted means using the following scale: 6=very dry and mealy; 5 = dry, mealy; 4 = mod. mealy, sl. moist; 3 = sl. mealy, mod.4

moist; 2 = soggy, not mealy; 1 = very soggy, not mealy.

Comments: Tx=soggy fry texture; Dk=dark fry color; Nu or Irr = french fries were irregular in color; dark blotches detracted from appearance of product; Be =5

Dark blotches on ends of many fries; Bc = Dark blotches in centers of many fries; Bl = general blotchy appearance of fries; Sh = Short fries from small and/or

round tubers; Gr=gray; Unif = more uniform in color than standards.

Overall rating: quality rated better (+), not different (o), or poorer (-) than Russet Burbank. 6

Maine Table 17. Chip color from 38 F, 45 F, and 50 F storage, reconditioning potential, bruise test scores, days to sprout formation, and storage weight losseso o o

at 38 F and 50 F for 32 potato varieties and clones grown at Presque Isle, Maine, during 2016 and stored during the 2016-2017 storage season.o o

Bruise Barrel Bruise Tests Days to Indic. Storage Wt.3 4

Variety Chip Color from Storage Skinning & % Shat- Blackspot Sprout Length Loss %5 6

50 F 45 F 38 F Recond. Shatter Index Cracks ter c" ½" 38 F 50 Fo 1 o 1 o 1 2 o o

Early, Red- and Purple-skinned Trial:

Chieftain (std) 35 -- -- -- 2.04 9 R 2.15 1.35 190 220 3.9 11.6

Norland, Dk. Red 41 -- -- -- 1.83 8 R 3.13 1.30 149 183 7.6 20.0s

Superior (std) 54 -- -- -- 1.00 99 VS 2.02 1.35 162 183 4.6 9.1

AF4138-8 53 -- -- -- 1.25 12 MS 2.70 1.05 227 248 5.0 7.5

AF4831-2 35 -- -- -- 4.15 7 R 2.63 1.32 127 162 6.9 12.4

AF4985-1 54 -- -- -- 3.83 8 R 2.32 1.15 190 227 5.9 7.5

AF5245-1 47 -- -- -- 1.18 36 MS 2.85 1.48 176 197 4.4 7.6

AF5280-5 70 -- -- -- 1.00 0 R 1.48 1.02 162 190 4.0 15.8

BNC244-10 16 pur -- -- -- 1.00 0 R 2.89 2.00 155 176 5.4 15.3

CO00291-5R 37 -- -- -- 2.90 5 R 3.51 2.20 204 248 8.6 13.0

CO098012-5R 48 -- -- -- 2.05 10 MR 2.18 1.32 183 204 4.7 9.2

Waller Duncan LSD 6 0.42 0.57

Medium Chipping and Table Trial:

Atlantic (std) 61 55 22 45 4.21 58 S 2.60 1.72 162 197 4.7 10.7

Katahdin 48 43 15 36 4.57 39 MS 1.68 1.32 183 213 4.4 16.6s

Kennebec 49 46 18 34 4.56 28 MS 1.90 1.20 190 213 4.5 6.8

Snowden 63 64 28 58 3.38 17 MR 1.58 2.05 162 190 4.3 12.7

Yukon Gold 53 47 20 39 2.86 29 MS 2.03 1.32 213 234 3.4 6.3

AF4552-5 61 59 24 36 1.54 50 S 2.09 1.68 190 220 3.4 10.4

AF4648-2 66 65 40 57 2.79 7 R 1.40 1.05 >241 >241 8.1 10.7r

AF5040-8 66 63 20 55 2.58 64 S 1.80 1.52 >241 >241 6.0 15.5

B3005-7 66 67 44 61 2.26 4 R 1.65 1.62 169 204 6.1 14.2

BNC364-1 65 67 36 58 3.43 39 MS 3.05 1.55 213 234 7.4 11.6

NY154 65 65 30 61 2.66 22 MS 1.35 1.65 149 183 6.4 12.3

NY157 68 69 36 66 3.11 96 VS 2.90 1.88 176 213 6.2 13.1

Waller Duncan LSD 6 7 5 9 0.48 0.52

Maine Table 17 cont.

Bruise Barrel Bruise Tests Days to Indic. Storage Wt.3 4

Variety Chip Color from Storage Skinning & % Shat- Blackspot Sprout Length Loss %5 6

50 F 45 F 38 F Recond. Shatter Index Cracks ter c" ½" 38 F 50 Fo 1 o 1 o 1 2 o o

Russet/Processing Trial:

Russet Burbank (std) 50 51 20 41 1.85 31 MS 1.48 1.40 214 235 2.8 4.5

Caribou Rus. (AF3362-1) 59 56 24 39 1.33 0 R 1.16 1.32 124 158 4.9 8.4

Reveille Russet 49 42 17 33 3.00 12 MR 1.22 1.00 >235 >235 3.2 3.1

R. Norkotah 52 43 18 44 1.00 40 S 1.12 1.08 172 193 3.8 7.1

Shepody 51 43 18 35 1.00 50 S 1.20 1.08 158 179 3.4 6.8

Teton Russet 51 52 18 29 2.10 60 S 1.55 1.08 158 193 3.8 7.6

AF4296-3 59 56 27 46 3.55 25 MS 1.12 1.20 207 235 5.4 6.0

AF4615-5 58 54 18 37 4.54 19 MR 1.28 1.78 193 221 7.1 4.9

AF4953-6 61 53 20 30 3.59 18 MR 1.58 1.22 179 200 4.4 12.7

Waller Duncan LSD 6 6 3 6 0.38 0.33

Maine Table 17 cont.

Stored at 38 F, 45 F, or 50 F, 85% R.H. from harvest until February 14 to 24, 2017. Chip color scores are from an Agtron Model M-35 Process Analyzer1 o o o

(Agtron, Inc., Sparks, Nevada; calibrated with black disk "0" = 0 and white disk "90" = 90). Chips were crushed and reported values are means from four

replicate samples. Each sample was read three times and was thoroughly mixed between readings. Higher numbers indicate lighter chip colors.

Reconditioned samples were taken from 38 F and placed at 65 F for a 3-week period then were chipped February 14 (mediums) or February 15 (russets), 2017. 2 o o

See Agtron description under footnote #1.

Skinning and shatter bruise were measured using a bruise barrel on September 19 (earlies, reds), September 19 (mediums), and September 29, 2016 (russets). 3

Approximately 10 lbs of tubers that exceeded 1f” diameter were tumbled in a drum with three stones for 1 minute at 15 rpm. Tubers were then rated for

combined skinning and shatter bruise. Data presented represent indices where: 1=all tubers have 0% of surface affected and 9=all tubers have 100% of

surface affected. Percentage of tubers with air and/or thumbnail cracks is reported (VS= very susceptible; S=susceptible, MS=moderately susceptible,

MR=moderately resistant; R=resistant).

Shatter and blackspot tests were conducted using the weight-drop method (12" for shatter and 6" for blackspot). The index presented indicates the severity of4

bruising/discoloration where: 1=no tubers show discoloration and 4=all tubers have severe discoloration. The shatter bruise test was conducted on December

14 to 29, 2016. The blackspot bruise test was conducted on January 25, 2017.

Tubers were stored at 45 F, 85% R.H. Days from vinekill to indicated sprout length are reported. (**no sprouting observed)5 o

Percentage sprout and weight loss following storage from harvest until March 27, 2017 at indicated temperature and 85% R.H. Codes “s” or "r" indicate6

heavily sprouted or samples with more than two spoiled tubers, respectively.

Maine Table 18. March chip color scores for NE1231 clones grown in central Maine (Exeter) during 2016 and chipped during the 2016-2017 storage season. ______________________________________________________________________________________________________________________________________________________________________________________________________________________

Variety or Agtron M35 Score by Chipping Date, and Storage Temperature1

Breeding Line

March 7 March 8 March 3

45F 45F recond. 50F______________________________________________________________________________________________________________________________________________________________________________________________________________________

Atlantic (std) 56 64 65

Katahdin 37 40 46

Kennebec 54 53 57

Snowden 64 67 65

Superior 50 52 58

Yukon Gold 28 40 45

AF4138-8 45 48 51

AF4552-5 57 63 61

AF4648-2 60 64 67

AF5040-8 61 68 64

AF5280-5 61 68 64

B3005-7 65 68 65

BNC364-1 65 67 65

NY154 66 69 67

NY157 67 70 69

W-Duncan LSD (k=100) 6 4 4 _______________________________________________________________________________________________________________________________________________________________________________________________________________________

Chip color scores are from an Agtron Model M-35 Process Analyzer (Agtron, Inc., Sparks, Nevada; calibrated with black disk "0" = 0 and white disk "90" =1

90). Chips were crushed and reported values are means from four replicate samples. Each sample was read three times and was thoroughly mixed between

readings. Higher numbers indicate lighter chip colors. Reconditioned samples were warmed to room temperature (65 to 70F) and held at room temperature

for two weeks.

Maine Table 19. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 19 chipping varieties and advanced breeding

clones grown at Exeter, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________



Variety cwt/A std. 7-7 1 2 3 4 5 6 to 4" to 4" to 4" Grav.

_______________________________________________________________________________________________________________________________

Central ME Advanced Test- 95 days

Atlantic (std) 387 196 100 184 96 (10) 1 5 19 55 16 3 96 90 71 1.089

Snowden 315 157 80 134 96 (12) 3 14 30 38 14 1 96 83 52 1.080

AF5484-3 348 276 141 262 93 (10) 1 4 15 43 28 7 91 87 72 1.082

AF5563-5 306 214 109 204 94 (10) 1 4 8 48 32 7 92 88 79 1.079

B2834-8 246 136 69 103 93 (10) 4 22 43 30 1 0 96 73 31 1.077

B2869-28 295 220 112 191 95 (10) 3 13 35 46 3 0 97 84 50 1.079

BNC369-4 378 326 166 275 95 (10) 3 15 29 50 3 0 97 82 53 1.080

COAF10055-6 282 209 107 183 97 (10) 2 12 23 48 12 3 95 83 59 1.077

WAF10664-3 370 310 158 232 98 (10) 4 25 42 28 1 0 96 71 29 1.085

#AAF10577-1 351 254 130 184 100 (10) 6 25 33 36 0 0 94 69 36 1.076

#AF5635-8 263 197 101 113 98 (10) 9 39 31 21 0 0 91 52 21 1.080

#AF5648-3 284 247 126 139 100 (10) 11 39 41 9 0 0 89 50 9 1.091

#AF5677-4 383 171 87 137 92 (10) 5 19 33 40 3 0 95 76 43 1.081

#AF5682-3 297 241 123 196 94 (10) 3 18 36 39 4 0 97 79 43 1.090

#AF5682-5 261 249 127 198 88 (10) 3 20 40 38 0 0 97 77 38 1.082

#NDAF113470C-3 371 170 87 137 100 (10) 3 19 32 41 4 0 97 78 46 1.079

#NDAF113490C-6 367 256 131 196 100 (10) 4 22 40 34 0 0 96 73 34 1.085

#NDAF113491C-6 333 265 135 235 100 (10) 2 11 23 58 6 0 98 87 64 1.078

#WAF12065-8 366 220 112 205 90 (10) 1 6 15 47 24 7 92 85 71 1.081

Waller Duncan

LSD (k=100) 34 67 52 9 8 11 0.007______________________________________________________________________________________________________________________________________________________________________________________________________________________

Four replications per variety, except were # appears before clone ID. # indicates two replicate plots per variety.




Maine Table 20. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 19 chipping varieties and advanced

breeding clones grown at Exeter, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)

_______________________________________________________________________________________________________________________________



7-21 8-28 @VK & Shatter Color Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color 5 2 3


______________________________________________________________________________________________________________________________________________________________________________________________________________________

Central ME Advanced Test- 95 days

Atlantic (std) 7 6 6.3 1.54 80S OW 5 3nu 4 de, cs, csp 47.5 3.6 1.6 2.4 39.7(3) 0.1 17.5 68(1.0)

Snowden 7H0.5 6 6.5 1.08 71S OW 5 rz 3nu 4 de, cs, csp 47.3 5.9 6.0 0.0 35.4(4) 0.0 0.0 66(1.0)

AF5484-3 7 7 7.0 3.12 24MR OW 7 3 6 13.6 7.3 1.4 0.6 4.3(2) 0.0 12.5 64(1.0)

AF5563-5 5 6 6.8 2.65 18MR OW 7 3 nu 6 24.4 8.0 1.4 7.9 7.1(1) 0.0 2.5 68(1.0)

B2834-8 5 4 4.0 1.00 90VS OW 6 2 4 cs, pits 42.7 3.1 1.3 4.5 33.1(4) 0.6 0.0 66(1.2)

B2869-28 6 5 5.8 1.22 83S Wh 7 rz 2 grc 5 24.3 2.0 2.2 8.0 11.7(1) 0.3 0.0 68(1.0)

BNC369-4 7 6 6.0 1.75 14MR OW 5 2 5 11.8 3.0 0.1 0.6 7.4(2) 0.7 5.0 70(1.0)

COAF10055-6 5 6 5.8 1.15 25MR OW 6 3 6 22.5 15.7 0.0 2.5 4.3(1) 0.0 0.0 67(1.0)

WAF10664-3 8 6 6.3 1.32 65S OW 6 2 6 de 13.7 1.3 1.1 0.2 10.9(1) 0.2 0.0 68(1.0)

#AAF10577-1 8 7 7.0 1.32 18MR YF1 7 2 6 de, cs 23.7 2.4 1.7 1.3 18.1(1) 0.2 0.0 64(1.0)

#AF5635-8 8 7 7.0 1.33 48S OW 7 2 6 de 17.2 4.1 0.7 0.0 12.4(2) 0.0 0.0 69(1.0)

#AF5648-3 7 5 5.5 2.03 37MS OW 7 2 6 2.1 0.7 0.0 0.0 0.7(1) 0.7 0.0 68(1.0)

#AF5677-4 7 5 6.0 1.29 29MS Wh 7 rz 3 4 cs, csp 53.2 1.6 0.0 0.0 51.4(4) 0.3 0.0 68(1.0)

#AF5682-3 7 6 6.0 1.00 85S Wh 7 3 6 16.5 5.3 1.4 1.9 7.3(1) 0.6 0.0 70(1.0)

#AF5682-5 7 7 7.0 1.52 43MS YF1 6 nu 4 nu 5 rs 1.8 0.7 0.0 1.1 0.0(0) 0.0 0.0 70(1.0)

#NDAF113470C-3 8 4 5.0 1.33 52S Wh 7 3 fl 6 cs, csp 52.6 9.3 0.4 0.0 42.9(2) 0.0 0.0 69(1.5)

#NDAF113490C-6 7 6 6.5 1.05 71S Wh 6 3 6 27.0 18.5 0.0 1.7 6.8(2) 0.0 20.0 66(1.0)

#NDAF113491C-6 7 4 5.0 2.00 76S OW 5 3 5 18.9 7.8 0.1 1.1 9.5(3) 0.4 5.0 65(1.0)

#WAF12065-8 6 7 7.0 2.00 32MS OW 6 grc 2 5 de, dae 34.3 25.5 1.9 6.9 0.0(0) 0.0 0.0 69(1.0)_____________________________________________________________________________________________________________________________________________________________________________________________________________________


See standard NE1231 rating system for key to codes; # indicates very good early vigor while ** and *=severe or moderate early vigor problems; cl=stolons1

cling; bs=black scurf; pr=some pear-shaped tubers; pue=trace purple around eyes; sz=small; yl=yellow skin color; de=deep eyes or dented apical or stem end;

fl=flat tubers; rs=russet scab; nu=nonuniform skin or shape; pstrk=purplestreak; cs=scab problem; csp=some pitted scab; le=enlarged lenticels. Scab severity

rating (1 rep only; p=some pitted scab): 0=none; 3=moderate; 5=severe. H1,H2, H3 = slight, moderate, severe chlorotic herbicide injury noted on June 14.

Percent hollow heart is based on 10 large tubers cut per plot.2







Maine Table 21. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 11 round-white varieties and advanced breeding

clones grown at St. Agatha, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)

______________________________________________________________________________________________________________________________________________________________________________________________________________________



Variety cwt/A std. 7-5 1 2 3 4 5 6 to 4" to 4" to 4" Grav. ______________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha Advanced Round-white Test - 105 days

Atlantic (std) 322 293 100 255 99 (10) 2 13 28 48 8 1 97 85 56 1.087

Katahdin 396 362 124 303 98 ( 8) 3 16 37 41 2 0 97 81 43 1.073

Superior 297 271 93 192 100 (10) 4 28 42 26 0 0 96 68 26 1.081

AAF08155-1 372 296 101 250 98 (10) 5 14 28 48 4 1 95 80 52 1.079

AF5450-7 455 427 146 354 96 (10) 4 17 36 41 3 0 96 79 44 1.074

AF5533-2 291 235 80 174 99 (10) 6 24 34 34 1 1 93 69 35 1.066

AF5658-6 327 269 92 147 94 (10) 6 43 38 13 0 0 94 51 13 1.078

AF5677-6 323 262 89 212 92 (10) 3 19 38 39 2 0 97 78 40 1.080

COAF10018-2 250 152 52 86 97 (10) 12 38 27 21 1 0 88 49 22 1.076

NDAF102629C-4 221 173 59 90 100 (10) 9 44 33 14 0 0 91 46 14 1.078

NDAF113458-2 366 291 99 205 94 (10) 7 28 37 28 0 0 93 66 28 1.072

W-D LSD (k=100) 49 47 46 4 10 9 0.004 ______________________________________________________________________________________________________________________________________________________________________________________________________________________





Maine Table 22. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 11 round-white varieties and

advanced breeding clones grown at St. Agatha, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)______________________________________________________________________________________________________________________________________________________________________________________________________________________



8-8 9-5 @VK & Shatter Color Tex- Shape ance Total burn shapen cracks Scab Rot Heart Color5 6 2 3


________________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha Advanced Round-white Test - 105 days

Atlantic (std) 8 5 5.3 1.76 62S OW 5 dull 2 5 de 6.5 2.2 2.7 0.5 1.1 (1) 0.0 2.5 66(1.2)

Katahdin 8 6 5.8 2.81 36MS Wh 7 dull 2 fl 5 5.0 1.5 0.6 0.1 2.8 (2) 0.0 0.0 54(3.0)

Superior 8 3 3.3 1.00 62S OW 6 dull 3 5 5.0 0.6 2.2 0.1 2.1 (1) 0.0 2.5 62(1.5)

AAF08155-1 8 6 6.0 3.20 20MR Wh 6 publsh 2 cs 5 de 15.6 1.2 1.0 0.2 13.2 (2) 0.0 0.0 56(2.8)

AF5450-7 8 7 7.0 1.67 12MR OW 5 dull 2 5 de 2.3 1.2 0.5 0.5 0.1 (1) 0.0 0.0 61(2.0)

AF5533-2 8 5 4.8 2.00 52S OW 6 2 6 pke 13.2 3.8 1.1 0.5 7.8 (1) 0.0 0.0 64(1.5)

AF5658-6 8 4 4.0 1.78 93VS YF2 6 rs 4 6 pke 11.8 0.9 2.1 0.3 8.4 (1) 0.1 0.0 70(1.0)

AF5677-6 6 7 6.5 1.26 67S YF1 6 dull 2 5 cs 15.6 0.6 1.3 0.5 13.2 (2) 0.0 0.0 65(1.0)

COAF10018-2 7 4 4.0 2.42 31MS YF1 7 pkblsh 2 5 cs 31.1 2.2 3.2 0.9 24.4 (3) 0.4 0.0 67(1.0)

NDAF102629C-4 7 5 4.0 3.21 64S Wh 8 3 6 cs 14.0 0.2 0.9 0.0 12.9 (2) 0.0 0.0 70(1.0)

NDAF113458-2 7 5 5.0 1.29 56S OW 6 publsh 3 6 dull 14.4 2.1 0.1 2.8 9.2 (1) 0.3 15.0 45(3.0)______________________________________________________________________________________________________________________________________________________________________________________________________________________


See standard NE1231 rating system for key to codes: pr=some pear-shaped tubers; brght=bright; pkptc=pink skin patches on apical end; pureye=purple at eye;1

pke=pink eyes; yl=yellow skin color; publsh=purple blush; pkblsh= pink blush; purpch=purple skin patch around apical or stem end; de=deep eyes or dented

apical and/or stem end; nu=nonuniform skin or shape; sc=skin cracking and/or checking; fl=flat tubers; rs=russet scab; st=stolons adhere to tubers; cs=pretty

except for scab problem; le=enlarged lenticels;csp=pitted scab present; and bs=black scurf.

Percent hollow heart is based on 10 large tubers cut per plot when available (40 tubers per clone when there are four replications per treatment). 2







color.


Maine Table 23. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 27 russet/processing (long-tuber-type)varieties

and advanced breeding clones grown at St. Agatha, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)________________________________________________________________________________________________________________________________________________________________________________________________________________________


Yield >1f" % of > (spacing) Size Class > > by length Spec.2

Variety cwt/A std. 4 oz. 7-5 1 2 3 4 5 8 oz 12 oz. >3" >3½" Grav.________________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha Advanced Russet/processing Test- 105 days

Russet Burbank (std) 367 357 100 258 100 (16) 27 52 17 3 1 21 3 69 49 1.076

Russet Norkotah 224 219 61 150 96 (12) 31 54 15 0 0 15 0 70 49 1.073

Shepody 265 158 44 117 98 (10) 27 53 16 4 0 20 4 67 44 1.072

AAF07521-1 405 317 89 283 99 (10) 11 41 31 12 5 48 17 86 68 1.080

AAF08434-1 240 236 66 155 100 (16) 34 62 4 0 0 4 0 61 33 1.082

#AAF10245-1 273 264 74 213 98 (12) 19 49 21 4 7 32 10 81 64 1.079

#AAF10626-1 353 345 97 198 100 (12) 42 50 8 0 0 8 0 40 19 1.087

AF4872-2 356 345 97 304 100 (12) 12 56 28 4 1 32 4 75 48 1.092

AF5071-2 394 369 103 314 95 (10) 15 44 30 8 3 41 11 85 73 1.084

AF5091-8 329 323 91 263 98 (10) 19 65 15 2 0 17 2 72 42 1.076

AF5164-19 400 343 96 289 96 (14) 16 58 24 2 0 27 2 75 53 1.073

AF5179-4 368 359 101 307 98 (10) 15 40 32 9 4 45 13 80 62 1.078

AF5312-1 362 359 101 260 100 (14) 27 60 11 2 0 13 2 55 29 1.075

AF5406-7 332 315 88 272 98 (12) 13 49 30 6 1 37 7 86 67 1.079

AF5406-10 323 313 88 208 99 (12) 34 60 5 1 0 6 1 63 35 1.085

AF5407-13 300 296 83 199 100 (12) 33 53 12 2 1 14 2 69 47 1.080

AF5468-5 310 306 86 226 98 (12) 26 56 14 4 0 18 4 66 44 1.078

#AF5522-4 244 236 66 186 88 (12) 21 59 14 4 2 20 6 74 57 1.076

AF5525-2 252 207 58 158 95 (12) 24 48 22 5 2 29 7 73 49 1.075

#AF5599-5 339 332 93 243 98 (12) 27 58 14 1 0 15 1 58 33 1.081

#AF5613-3 377 367 103 312 95 (12) 15 54 18 7 6 31 13 82 58 1.079

#AF5625-1 319 308 86 263 93 (12) 14 62 15 8 1 24 9 82 61 1.075

NDAF092412-3Rus 365 345 97 273 89 (12) 21 49 23 6 1 30 7 79 58 1.077

WAF10051-1Rus 300 252 71 196 98 (12) 23 54 19 3 0 23 3 72 47 1.080

WAF10073-3Rus 271 266 75 179 99 (12) 32 59 8 0 0 8 0 61 37 1.080

#WAF10509-3Rus 314 308 86 211 98 (12) 31 60 9 0 0 9 0 78 47 1.084

#WAF10612-1Rus 384 382 107 245 98 (12) 36 51 11 2 1 14 3 47 23 1.079

Waller Duncan LSD (k=100) 49 49 47 10 6 10 11 0.006 _______________________________________________________________________________________________________________________________________________________________________________________________________________________





Maine Table 24. Plant size, maturity at vinekill, tuber shape, tuber defects, hollow heart ratings, and chip color scores for 27 russet/processing (long-tuber-type)

varieties and advanced breeding clones grown at St. Agatha, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)________________________________________________________________________________________________________________________________________________________________________________________________________________________





________________________________________________________________________________________________________________________________________________________________________________________________________________________

St. Agatha Advanced Russet/processing Test- 105 days

Russet Burbank 7 6 6.3 4.22 11MR OW 4 7 nu 5 2.8 1.5 0.7 0.6 0.0 (0) 0.0 0.0 47(3.0)

Russet Norkotah 5 4 4.0 1.50 4R OW 3 7 6 2.2 1.6 0.4 0.2 0.0 (0) 0.0 0.0 46(3.0)

Shepody 6 4 4.5 1.60 14MR Wh 7 7 4 cs 38.5 4.3 1.7 0.1 32.4 (1) 0.0 0.0 56(3.0)

AAF07521-1 8 6 6.3 2.45 68S Wh 4 cn 6 pke 5 sunb 22.5 14.4 0.2 0.2 7.2 (1) 0.4 0.0 56(2.5)

AAF08434-1 4 5 4.8 2.57 58S Wh 4 rs 6 6 1.8 0.8 0.0 0.6 0.3 (1) 0.0 0.0 63(2.0)

#AAF10245-1 7 6 6.0 3.88 62S OW 4 rs, fl 7 bent 4 pts 3.1 1.2 0.9 1.1 0.0 (0) 0.0 0.0 64(2.5)

#AAF10626-1 8 5 4.5 1.58 87S OW 3 4 obl 5 rnd 2.2 1.4 0.5 0.2 0.0 (0) 0.2 0.0 59(2.5)

AF4872-2 8 6 5.0 1.50 89S OW 4 6 blky 5 3.1 0.9 0.0 0.6 1.3 (1) 0.3 0.0 64(1.8)

AF5071-2 8 7 6.8 3.73 19MR OW 4 cn 7 6 6.0 4.2 0.9 0.7 0.2 (1) 0.1 0.0 55(3.0)

AF5091-8 7 5 4.5 1.47 44MS OW 4 cn 6 nu 5 1.8 0.9 0.4 0.4 0.0 (0) 0.0 0.0 55(3.0)

AF5164-19 7 6 6.0 1.73 63S OW 4 cn 7 obls 6 sunb 14.3 12.6 0.0 1.3 0.1 (1) 0.2 0.0 53(2.8)

AF5179-4 7 7 7.0 3.87 35MS OW 4 cn 6 blky 6 2.5 1.2 0.9 0.5 0.0 (0) 0.0 0.0 41(3.0)

AF5312-1 8 5 4.3 2.84 65S OW 3 6 obls 6 0.7 0.7 0.0 0.0 0.0 (0) 0.0 0.0 47(3.0)

AF5406-7 7 6 6.3 4.00 70S OW 4 rs 7 6 5.1 1.7 0.1 3.1 0.0 (0) 0.2 0.0 45(3.0)

AF5406-10 8 5 5.0 1.50 50S OW 6 cn 7 ptd 5 2.9 2.6 0.2 0.0 0.0 (0) 0.1 2.5 58(2.5)

AF5407-13 5 6 6.3 2.45 68S OW 4 cn 6 5 1.5 1.5 0.0 0.0 0.0 (0) 0.0 0.0 54(2.8)

AF5468-5 7 6 6.3 2.38 68S OW 3 6 obls 6 1.3 1.1 0.1 0.1 0.0 (0) 0.0 0.0 41(3.0)

#AF5522-4 7 6 6.0 5.30 20MR OW 3 6 bent 5 3.3 1.2 0.0 1.0 1.1 (1) 0.0 0.0 60(2.5)

AF5525-2 7 5 5.3 2.29 83S OW 3 rz 6 nu, fl 5 grc 18.2 3.9 1.0 13.2 0.0 (0) 0.0 0.0 39(3.0)

#AF5599-5 8 7 7.0 3.85 4R OW 4 6 6 1.9 0.8 0.0 1.2 0.0 (0) 0.0 0.0 33(3.0)

#AF5613-3 6 6 5.5 2.50 14MR OW 4 7 nu 6 2.8 2.3 0.0 0.4 0.0 (0) 0.1 0.0 50(3.0)

#AF5625-1 7 6 6.0 6.09 18MR OW 6 7 nu 5 pts 3.4 2.8 0.0 0.5 0.0 (0) 0.1 0.0 66(3.0)

NDAF092412-3Rus 6 7 7.0 4.21 0R OW 4 msh 7 bent 4 nu 5.6 3.2 0.8 0.2 1.3 (1) 0.1 0.0 53(2.5)

WAF10051-1Rus 6 4 3.8 1.50 91VS OW 4 6 obls 6 cs 15.0 0.8 0.3 0.1 13.8 (1) 0.0 0.0 64(1.8)

WAF10073-3Rus 6 4 4.3 1.85 33MS Wh 4 7 nu 5 1.6 0.9 0.0 0.6 0.0 (0) 0.1 0.0 61(2.0)

#WAF10509-3Rus 6 5 5.5 2.13 29MS OW 4 7 nu 5 2.2 1.2 0.5 0.0 0.4 (1) 0.1 0.0 48(3.0)

#WAF10612-1Rus 8 7 7.0 5.08 4R OW 3 6 6 0.6 0.4 0.0 0.2 0.0 (0) 0.0 0.0 38(3.0)_______________________________________________________________________________________________________________________________________________________________________________________________________________________


See standard NE1231 rating system for key to codes; nr=nonuniform russeting; le=enlarged lenticels; cr=skin cracks; pr=many pear-shaped tubers; wh=white-1

skinned; pe=trace of pink at eye; pureye=trace of purple at eye; we= dark russet w/white eyes; dk=dark brown; bs=black scurf; blky=blocky; ch=skin checking;

and rs=russet scab.

Percent hollow heart is based on 10 large tubers cut per plot when available (40 tubers per clone when there are four replications per variety).2

Chip color from 50F -- Agtron M35 (higher values indicate lighter color): >62 acceptable. The chipping dates were December 11, 2017. Waller Duncan LSD3

(K=100) for chip color = 6.4. A stem-end defect score is presented in parenthesis (1=good; 2=fair; 3=poor), LSD (K=100) for stem end = 0.8.





color.

Common and powdery scab were observed in this experiment. 6

Maine Table 25. French fry color and uniformity ratings for 27 potato clones and varieties grown at St. Agatha, Maine during 2017 (Advanced Russet Trial).1

Advanced Ruset Trial, St. Agatha, ME

Fry % Fry Uniformity 3

Color OO % Dk.

Variety Index & O %VG %G Ends Overall Notes 2 2 4

Russet Burbank (std) 0.80 43 58 82 18 fair col, vde

Russet Norkotah 0.83 50 38 82 18 fair col, vde

Shepody 0.54 88 42 95 2 good

AAF07521-1 0.61 70 50 95 5 good

AAF08434-1 0.15 100 95 100 0 VG

AAF10245-1 0.20 100 60 100 0 VG

AAF10626-1 0.50 85 70 100 0 good

AF4872-2 0.25 88 75 85 15 F-G vde

AF5071-2 0.49 92 68 100 0 good

AF5091-8 0.68 70 75 98 2 good

AF5164-19 0.54 78 31 88 12 fair vde

AF5179-4 1.11 8 60 95 5 fair col

AF5312-1 0.77 49 72 92 0 good sl nu

AF5406-7 1.09 32 72 98 2 fair col

AF5406-10 0.36 95 75 100 0 VG

AF5407-13 0.69 72 60 95 2 good

AF5468-5 0.85 50 68 100 0 good

AF5525-2 0.94 50 45 88 10 fair col, vde

AF5522-4 0.30 100 70 85 15 F-G vde

AF5599-5 1.33 5 40 100 0 F-P col

AF5613-3 0.65 70 45 100 0 F-G

AF5625-1 0.18 100 50 80 20 F-G vde

NDAF092412-3Rus 0.43 85 58 95 5 good

WAF10051-1Rus 0.15 100 75 100 0 V-G

WAF10073-3Rus 0.39 100 85 90 0 good sl nu

WAF10509-3Rus 0.88 35 50 95 5 F-P col

WAF10612-1Rus 1.25 10 55 100 0 F-P col

W-D LSD (k=100) 0.29 30 36 ns ns

Center raw tuber slabs were cut from each of ten tubers. The raw slabs were fried at 375 F for 3.5 minutes, placed on a papers towel, and fry color was rated1 o

after the slices had cooled slightly. All tuber samples were stored at 50 F, 85% R.H. from harvest until processing. Frying and evaluations were conducted ono

December 14 and 15, 2017.

Color Grades are from the USDA color standards chart #64-1, third edition. A weighted fry color index was calculated where 0.1=all slices were very light,2

USDA category OO and 4.0=all slices were very dark, USDA category #4. Lower indices indicate lighter color. Percentage of slices rating USDA category 0 or

lighter is listed (percentage of 40 slices rated).

Fry slices were rated for color uniformity. %VG = percentage of slices out of 40 that were rated very uniform. %G= percentage of slices that were rated very3

uniform to having only slight stem end defects. %Dk. Ends = percentage of slices that had moderate to severe stem-end defects.

Notes: vde=very dark ends; sed=stem end defects; nu=non-uniform color, blotchy; col=dark fry color; sl gr = some slices with slight graying; gre = gray ends, hh4

= hollow heart defects.

Maine Table 26. Yield, marketable yield, percentage of yield by grade size distribution, and specific gravity for 10 red- and purple-skinned varieties and

advanced breeding clones grown at Aroostook Research Farm, Presque Isle, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)_______________________________________________________________________________________________________________________________________________________________________________________________________________________




Advanced Red Test- 105 days

Dark Red Norland (std) 206 180 100 127 97 (10) June 8 8 26 47 19 0 0 92 66 19 1.079

Adirondack Blue 130 92 51 26 99 (10) June 8 24 55 20 1 0 0 76 21 1 1.079

Adirondack Red 104 67 37 21 90 (10) June 15 31 48 20 1 0 0 69 21 1 1.069

AF4659-12 209 119 66 14 100 (10) June 12 41 52 6 0 0 0 59 7 0 1.087

#AF5245-1 182 150 83 57 100 (10) June 8 16 52 27 5 0 0 84 32 5 1.093

AF5412-3 167 135 75 67 100 (10) June 8 10 44 40 6 0 0 90 46 6 1.086

AF5414-1 207 151 84 57 98 (10) June 14 21 49 26 4 0 0 79 30 4 1.093

AF5633-2 157 116 64 43 100 (10) June 8 26 48 19 7 0 0 74 26 7 1.089

BNC201-1 191 176 98 108 97 (10) June 12 6 37 46 11 1 0 94 58 11 1.095

#NDAF102696C-5 236 211 117 110 100 (10) June 8 9 43 43 4 0 0 91 47 4 1.084

Waller Duncan

LSD (k=100) 50 50 21 7 9 5 0.004 _______________________________________________________________________________________________________________________________________________________________________________________________________________________




Size classes: 1=1½ to 1f"; 2=1f to 2¼"; 3=2¼ to 2½"; 4=2½ to 3¼"; 5=3¼ to 4"; 6=over 4" .3

Maine Table 27. Plant size, maturity at vinekill, tuber shape, tuber defects, and hollow heart ratings for 10 red- and purple-skinned varieties and advanced

breeding clones grown at Aroostook Research Farm, Presque Isle, Maine - 2017. (Advanced Breeding Line Variety Trial, Pre-NE1231)________________________________________________________________________________________________________________________________________________________________________________________________________________________


Variety Size Maturity Skinning Flesh Skin Appear- Sun- Mis- Growth Hollow

8-8 8-17 @VK & Shatter Color Tex- Shape ance Total burn shapen cracks Scab Rot Heart 4 5 2

Index %Crcks. ture 3 3

________________________________________________________________________________________________________________________________________________________________________________________________________________________

Advanced Red Test- 105 days

Dark Red Norland (std) 7# 4 3.8 1.47 50MS OW 6 grc 3 6 mbr 6.0 0.0 1.6 4.4 0.0(0) 0.0 0.0

Adirondack Blue 7 5 4.0 1.21 48MS PF 6 5 nu 5 mdp 6.9 0.0 5.5 1.5 0.0(0) 0.0 4.8

Adirondack Red 6* 3 3.0 2.45 26MR RF 5 grc 7 nu 5 mdr 6.5 0.0 1.4 4.9 0.0(0) 0.2 0.0

AF4659-12 9H1 7 7.0 2.83 17MR YF1 7 ylspl 5 nu 7 mr 7.1 0.0 6.4 0.7 0.0(0) 0.0 0.0

#AF5245-1 7# 5 5.0 1.00 94S OW 7 2 6 mpur 2.0 0.0 1.4 0.5 0.0(0) 0.1 0.0

AF5412-3 7# 7 6.3 2.00 35MS PF 7 5 nu 5 mdp 10.6 0.0 10.0 0.5 0.0(0) 0.1 0.0

AF5414-1 7 6 6.0 1.65 35MS RF 6 dull 4 grc 5 dr 7.8 0.2 3.7 3.8 0.0(0) 0.1 0.0

AF5633-2 8# 6 5.5 1.94 45MS PurM 7 2 6 mdp 2.9 0.3 1.3 1.0 0.0(0) 0.3 0.0

BNC201-1 6 6 5.3 3.37 45MS YF2 6 2 6 mbr 3.0 0.0 1.7 1.1 0.0(0) 0.2 0.0

#NDAF102696C-5 6 5 4.5 2.22 21MR OW 7 3 7 br 1.6 0.0 1.6 0.0 0.0(0) 0.0 0.0________________________________________________________________________________________________________________________________________________________________________________________________________________________


See standard NE1231 rating system for key to codes; puspl=purple splash; ylspl=yellow splash ppk=pale pink skin; pk=pink to pale red skin; prd=pale red skin;1

lmr=light medium red skin; mr=medium-red skin; mbr=medium to bright red skin; br=bright red skin; dr=dark red skin; mpur=medium purple skin; dpur=dark

purple skin; vdpur=very dark purple skin, dull; pr=some pear-shaped tubers; pch=pink skin patches; sbd=slight black dot; mbd=moderate black dot; bd!=severe

black dot; yl=yellow skin color; de=deep eyes; rs=russet scab; nu=nonuniform skin; cs=pretty except for scab problem; le=enlarged lenticels; cr=skin cracks;

st=stolons cling; ss=silver scurf and/or other similar discoloration. # indicates very good early vigor while ** and *=severe or moderate early vigor problems;

H2=slight to moderate herbicide injury noted on June 22; H3=moderate herbicide injury; H4=moderate to severe herbicide injury.

Percent hollow heart is based on ten large tubers cut per plot (40 large tubers cut per variety when there are four replications per variety). 2

Skinning and shatter bruise were measured on September 18, 2017 (4 days after harvest). Data presented represent indices where: 0=all tubers have 0% of3

surface affected and 9=all tubers have 100% of surface affected. Percentage of tubers with air and/or thumbnail cracks is reported (S=susceptible,


Flesh color: Wh=white; OW=off-white; YF=yellow-fleshed where higher number indicates brighter yellow color; PurM=purple with white; RedM=red with4

white; PK=pink; PKM=pink with white.

No scab was observed in this experiment. 5

Maine Table 28. Washed skin color evaluations from storage for red- and purple-skinned varieties and advanced breeding clones grown at Aroostook Research

Farm, Presque Isle, Maine - 2016 and stored during the 2016/2017 storage season. (NE1231 Regional and Advanced Breeding Line Variety Trials, Pre-NE1231)_______________________________________________________________________________________________________________________________________________________________________________________________________________________

Washed Skin Color1

Variety Skin Color Index Percent Flesh Color

>Fair >Good_______________________________________________________________________________________________________________________________________________________________________________________________________________________

NE1231 Regional Red- and Purple-skinned Test (2016)

Dark Red Norland (std) Med. Bright Red 1.37 3 0 Off-white

Chieftain Pale Medium Red 2.58 63 8 White

AF4831-2 Med. Bright Red 1.40 5 0 White

AF4985-1 Med. Bright Red 1.34 6 4 Off-white

AF5245-1 Medium Purple 1.83 20 5 Off-white

BNC244-10 Dark Purple 1.78 15 0 Purple, mottled

CO00291-5R Med. Dark Red 1.70 10 0 Off-white

CO098012-5R Med. Bright Red 1.78 23 0 Off-white

Waller Duncan LSD (k=100) 0.45 24 5

Advanced Red- and Purple-skinned Test (2016)

Dark Red Norland (std) Med. Bright Red 2.15 39 8 White

Adirondack Blue Dark Purple 2.02 19 0 Purple

Adirondack Red Medium Red 1.98 15 0 Red, mottled

AAF08155-1 Purple splash 2.68 70 11 White

AF4659-12 Medium Red with Yellow 2.73 65 11 Yellow, YF1

AF4831-2 Med. Bright Red 2.03 29 3 White

AF4985-1 Med. Bright Red 1.63 16 5 Off-white

AF5245-1 Medium Purple 2.22 32 2 White

AF5412-3 Dark Purple 2.36 44 3 Purple

AF5414-1 Medium Dark Red 2.19 31 1 Red, mottled

AF5633-2 Medium Purple 2.23 38 10 Purple, mottled

AF5658-2 Pale Medium Red 2.65 73 3 Yellow, YF2

BNC201-1 Med. Bright Red 2.34 51 3 Yellow, YF2

NDAF102691B-7 Med. Bright Red 2.03 28 0 Off-white

NDAF102696C-1 Med. Bright Red 2.53 54 11 Off-white

NDAF102696C-5 Bright Red 2.33 43 8 Off-white

NDAF113431C-2 Med. Bright Red 2.15 35 0 White

NDAF113458-2 Purple splash 3.00 92 8 Off-white



Waller Duncan LSD (k=100) 0.74 34 19_______________________________________________________________________________________________________________________________________________________________________________________________________________________

Washed appearance ratings were conducted on January 18 (NE1231) and January 17, 2017 (advanced). Tubers were rated for skin appearance using the1

following scale: 1=very poor; 2=poor; 3=fair; 4=good; 5=excellent. Higher indices indicate more attractive color.

Maine Table 29. Sensory evaluation results for NE-1231 and advanced breeding clones grown at Aroostook Research Farm, Presque Isle, ME - 2016. _____________________________________________________________________________________________________________________________________________________________________________________________________________

Baked Test Results Boiled Test Results Total Free Antioxidants1 2

Variety Color Flavor Texture Overall Sloughing Graying Overall Phenolics ORAC3 3

_____________________________________________________________________________________________________________________________________________________________________________________________________________

Red-skinned and/or Early/Medium Maturity Test:

Superior (std) 6.8a 6.5a 6.8a 6.8a

Dark Red Norland (std) 7.2a 7.2a 7.0a 7.1a

AF4985-1 7.3a 7.0a 6.4a 6.7a

AF5245-1 6.7a 6.8a 6.9a 6.9a

Mid-season Varieties:

Atlantic (std) 6.6a 5.9b 5.4b 5.8b

Superior (std) 6.9a 6.5ab 6.8a 6.7a

AF4138-8 7.0a 7.2a 7.2ab 7.2a

AF5280-5 7.1a 6.4ab 6.7a 6.4ab

Late Varieties:

Katahdin (std) 7.0a 6.8a 6.9a 6.8a

Yukon Gold (std) 6.3a 6.6a 6.8a 6.6a

AF4552-5 6.4a 5.6b 5.7b 5.4b

AF4648-2 7.1a 6.5ab 6.7ab 6.6a

Russet/long-white Test:

Russet Burbank (std) 6.8a 6.3a 6.3a 6.3a

Teton Russet 7.1a 6.9a 7.1a 6.7a

AF4296-3 7.0a 6.7a 6.8a 6.3a

AF4953-6 6.8a 6.1a 6.4a 6.2a ___________________________________________________________________________________________________________________________________________________________________________________________________________________

Similar-sized potatoes were baked during February and March 2017 for 60 minutes at 425F and were turned once after 30 minutes. Panelists were provided with1

1/4 sections of baked test and standard variety potatoes. They were asked to rate the color, flavor, texture, and overall quality of each using a 9-point hedonic

scale where 1=disliked very much and 9=liked very much. Water was provided and panelists were asked to rinse palate before and after each sample.

Evaluations conducted courtesy of Dr. Mary Ellen Camire, School of Food & Agriculture, University of Maine, Orono, ME.

Similar-sized potatoes were peeled and boiled at 180F for approximately 20 minutes or until cooked. Approximately six potatoes per sample were used. 2

Panelists were provided with a plate of boiled test and standard variety potatoes. They were asked to visually rate sloughing and graying using a 1 to 15 scale

where: sloughing 1 = no sloughing and 15 highly sloughed; graying 1=no graying and 15 extremely gray. Evaluations conducted courtesy of Dr. Mary Ellen

Camire, School of Food & Agriculture, University of Maine, Orono, ME. Overall ratings: - is poorer, = is equal, + = better than the standard variety.

Total free phenolics = mg chlorogenic acid equivalents per 100 g fw; ORAC = mg Trolox equivalents per 100 g fw.3

Maine Table 30. Standard NE1231 Rating codes for Plant and Tuber Characteristics.

Plant Characteristics

Rating Plant Air Vine Plant Maturity

Code Size Pollution Maturity Appearance at Vinekill

1 Very Small Dead Very Early Very Poor Completely Dead

2 + -- Early Poor --

3 Small Mod. Defol. + + Yellow and Dying

4 + -- Medium Early -- --

5 Medium Mod. Injury Medium Fair Moderately Mature

6 + -- Medium Late + --

7 Large Mild Injury + -- Vines Starting to Mature

8 + -- Late Good --

9 Very Large No Symptoms Very Late Excellent Vines Green and Vigorous

Tuber Characteristics

Rating Skin Skin Tuber Eye Overall

Code Color Texture Shape Depth Appearance

1 Purple Part. Russet Round Very Deep Very Poor

2 Red Heavy Russet Mostly Round -- --

3 Pink Mod. Russet Round to Oblong Deep Poor

4 Dark Brown Light Russet Mostly Oblong -- --

5 Brown Netted Oblong Intermediate Fair

6 Tan Slight Net Oblong to Long -- --

7 Buff Mod. Smooth Mostly Long Shallow Good

8 White Smooth Long -- --

9 Cream Very Smooth Cylindrical Very Shallow Excellent

2017 maine potato variety trials ne1231 regional … variety trials 2017rpt posting.pdffar below...

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