2015 sf exploratorium lecture: "corn: diversity and origins"
TRANSCRIPT
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Corn: Diversity and Origins
Jeffrey Ross-Ibarra @jrossibarra • www.rilab.org University of California, Davis
Photo: Jason Wallace
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tassel (male)
ear (female)
Photo: U. Nebraska-Lincoln
corn (maize)
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tassel (male)
ear (female)Photo: OllieMartin
Photo: U. Nebraska-Lincoln
corn (maize)
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tassel (male)
ear (female)Photo: OllieMartin
Photo: U. Nebraska-Lincoln
Photo: © HD WIlson
corn (maize)
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Photo: Rosana Prada
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Photo: https://www.flickr.com/photos/dandelion-and-burdock/
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ACTG
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Photo: Michael Neugebauer
1.2% DNA difference
Photo: USDA
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Photo: Michael Neugebauer
1.2% DNA difference1.6% DNA difference
Photo: USDA
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Original DNA
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Mutation
Original DNA
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Original DNA Transposon
Barbara McClintock 1902-1992
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Original DNA Transposon
Barbara McClintock 1902-1992
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Original DNA Transposon
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Photo: Damon Lisch
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purple:no transposon
Photo: Damon Lisch
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purple:no transposon
yellow:transposon
inserted
Photo: Damon Lisch
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purple:no transposon
yellow:transposon
inserted
spots:transposon jumps
Photo: Damon Lisch
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purple:no transposon
yellow:transposon
inserted
spots:transposon jumps
Photo: Damon Lisch
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no transposon
Photos: Cold Spring Harbor Laboratory Press
transposon
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A TG AC T
A TG GC T
A CG GC T
A TG GC T
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A TG AC T
A TG GC T
A CG GC T
A TG GC T
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A TG AC T
A TG GC T
A CG GC T
A TG GC T
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A TG AC T
A TG GC T
A CG GC T
A TG GC T
A TG AC T
A CG GC T
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A TG AC T
A TG GC T
A CG AC T
A TG AC T
A CG AC T
A CG GC T
A CG GC T
A TG GC T
traditional (landrace)
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A CG GC T
A CG GC T
modern industrial corn
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A CG GC T
A CG GC T
A CG GC T
A CG GC T
modern industrial corn
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A CG GC T
A CG GC T
A TG AC T
A TG AC T
Modern Industrial Corn
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A CG GC T
A CG GC T
A TG AC T
A TG AC T
A CG GC T
A TG AC T
Modern Industrial Corn
![Page 33: 2015 SF Exploratorium Lecture: "Corn: Diversity and Origins"](https://reader031.vdocuments.net/reader031/viewer/2022030302/587e29481a28abb93e8b58db/html5/thumbnails/33.jpg)
A CG GC T
A CG GC T
A TG AC T
A TG AC T
A CG GC T
A TG AC T
A CG GC T
A TG AC T
Modern Industrial Corn
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A CG GC T
A CG GC T
A TG AC T
A TG AC T
A CG GC T
A TG AC T
Modern Industrial Corn
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Beadle 1979 Field Museum of Natural History Bulletin Meyerowitz 1994 Current Biology
Duvick et al. 1999 US 6639132 B1
maize origins
Tripsacum extinct maizeF1F1
teosinte Zea mays ssp. parviglumis
maize Zea mays ssp. mays
George Beadle
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Meyerowitz 1994 Current Biology Duvick et al. 1999 US 6639132 B1
maize origins
Tripsacum extinct maizeF1F1
teosinte Zea mays ssp. parviglumis
maize Zea mays ssp. mays
teosinte parviglumis
teosinte mexicana
modern corn
Matsuoka 2002 PNAS
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teosinte parviglumis
teosinte mexicana
modern corn
Matsuoka 2002 PNAS
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Photos: Matt Hufford, Brandon Gaut, John Doebley
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teosinte teosinte
modern corn
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modern corn
teosinte
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modern corn
teosinte
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modern corn
reconstructed ancestral corn
01010
0010 01011 01111
10
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modern corn
reconstructed ancestral corn
01010
0010 01011 01111
10
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Highland Route
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Highland Route
Pacific Route
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Photo: Moenkopi Legacy Inn & Suites
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Highland Route
Pacific Route
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Highland Route
Pacific Route
modern Chapalote
modern Palomero
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Highland Route
Pacific Route
modern Chapalote
modern Palomero
Tularosa Cave
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Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
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Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
2,000 yrs 1,000 yrs
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Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
700 yrs2,000 yrs 1,000 yrs
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01010
0010 01011 01111
10
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