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Efficiency of data presentation & utilization in state soybean
variety trials
Lingxiao (Ling) Zhang
Delta Research and Extension Center Mississippi State University
Tampa, FL.
01-28-2010
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State Soybean Variety Test Procedures
Variety collection
Experimental design
Find locations &cooperators
Preparation PlantingData collection
Harvest
Data analysis
Result Report
Recommendations
OVT Group
Producers Seed company Uni. researcherExtension agent
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• Hard copy • Internet
- htm
- xls
- database
• Field Day
Report Methods for OVT
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Soybeans Variety Test Results in Illinois
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SOYVA 2009 - Soybean Variety Selection Program (SOYVA) is a computerized soybean variety selection program (U-AR).
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Data Utilization from OVT
An Internet-base soybean variety trial database for research, extension and production
Deltasoy
Database Modeling
Internet
Information system
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Diagram of a three-tier of architecture of a Web-based database
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Entity relationship diagram of parameters in Deltasoy database.
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Dependency diagram of parameters in Deltasoy database.
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Variety selection interface of Deltasoy
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An example of Deltasoy result table
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Multi-year => result
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Multi-year => single variety)
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Deltasoy – Home page
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Variety comparison of Deltasoy Database
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“Disease info” of Deltasoy Database
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Soypheno
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“SoyPheno” of Deltasoy Database
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SoyPheno - search results & recommendation
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A database for national soybean OVT?
Soyrus
Soy-r-us
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Who gets benefit from Soyrus?
• Crop grower
• Seed company
• Private consultant
• County agent
• University researcher
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How can a database help?
• Multi-year
• Multi-location
• Comparing different Variety or systems
• Add more function for analysis (weighted)
Vt = (a) P1 + (b) P2 + (c) P3 + …
• Long-term data accumulation
• Initial other research topics
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Modify Soybean MG Adaptation Zones
(Scott and Aldrich, 1970)
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Test site distribution of OVT
SDMS
MIIL
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Materials and Methods
Data sources
- State soybean variety trials
- All soybean producing states
Data criteria
- Most of irrigated test
- Yield over 45 bu/A (3030 kg/h)
- 30 varieties or more in a test
- Planting date within certain range
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(Locations selected for creating adaptive zones of soybean MG in the USA)
Map construction
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Zones of optimum soybean maturity groups for maximum yield in the US
(Figure was created by the Kriging interpolation method using variety trial data from 1998 to 2003 )
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Modified zone of optimum soybean maturity groups for maximum yield in the US
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Application of OVT data
Growth stage and maturity prediction at all location?
- Data source – latitude, PD & MD
- Method – modeling (regression, ANN, etc.)
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Information links to soybean producing states in the USA
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Diagram of 3-layers of back propagation ANN
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A sigmoid function and calculation process for one node.
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Potential researchable topics using an OVT database
* Protein & oil content?- Type of variety - Year trend under diff. envion. conditions
* Yield trend?- historical data may tell real genetic gain?
* Environmental effects on yield?- G x E - Soil type, - Irrigation, disease, insect
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Major Problems
Funding- USB ?- Other agents?
Different focuses for each state - Focus on the similarity
Need action- Form a committee
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Parameters in database
CommonVariety name
MG (RM)Yield
Plant heightMaturity Date
LocationIrri. vs. N-iir.Conv. vs. RR
(Planting Date)…..
May be VariedShattering scoreLodging scoreProtein content
Oil content…..
Genetic controlled Flower& PodPubescence
Disease …..
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Other Problems
Update information?- Variety turn over past- Disease resistance
Other
Website/Server maintenance- Web submission
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A Diagram of Soyrus for Soyean Production
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Thank You !
Question?
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Field Day – what makes up the lunch?
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Comparison summary
The adaptive zone for one MG is about 3-4 degrees latitude, wider than it was suggested, especially for mid-late MGs (>III) in the south.
VI is the latest MG adapted in the US for the optimum yield, and MG VII-VIII are not optimum MGs for the US (if not count FL)
Late maturity (VI) soybeans adapted to East coast rather than the Midsouth due to available late precipitation.
00-
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Recent Soybean Variety Turn-over Ratio
0
10
20
30
40
50
60
1-3 y 4-6 y 7-10 y Over 10 y
Data source: popular conventional and roundup ready soybean varieties collected by NCST (n=245)
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Zones and planting date divided for soybean producing states involved in MG map construction
Region Latitude States included Planting date
North > 43o ND, SD, MN, WI, MI. 5/10 – 6/20
Central 43o-36 o NE, IA, KS, MO, IL, IN, OH, PA, WV, VA, NJ,
DE, MD, NY.
4/25 – 6/15
South <36 o OK, AR, TX, LA, MS, AL, GA, SC, TN, NC,
KY,
4/10 – 6/10
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Materials and Methods (cont.)
Determination of the values of optimum maturity groups
- regression method: yield vs. MG
- maximum yield weighted average
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Determination of MG values using regression
0
1000
2000
3000
4000
5000
6000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Soybean maturity group
Yie
ld (
kg
ha-1)
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Calculation of optimum values of MG using weighted yields
Vmg = w*x/w= (w1x1 +w2x2 +…+w30x30)/
(w1+w2+…w30)
where, w is the weighing fact, the percentage of yield relative to the maximum yield, and x is the value of maturity group.
Variety MGx
Yield (bu/A)
Weight w (%)
1. H5545 5.5 87.1 100
2. R921294 4.9 85.9 98.6
3. A5979 5.9 84.8 97.4
…. …. …. ….
28. DP5354 5.3 71.3 81.9
29. DG3576 5.7 71.3 81.9
30. HX517462 5.1 70.8 81.3