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Corn: Diversity and Origins

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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) corn (maize) Photo: U. Nebraska-Lincoln


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tassel (male) ear (female) Photo: OllieMartin corn (maize) Photo: U. Nebraska-Lincoln


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tassel (male) ear (female) Photo: OllieMartin corn (maize) Photo: © HD WIlson Photo: U. Nebraska-Lincoln


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Photo: Rosana Prada


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Photo: https://www.flickr.com/photos/croptrust/


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Photo: https://www.flickr.com/photos/dandelion-and-burdock/


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A C T G


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Photo: USDA Photo: Michael Neugebauer 1.2% DNA difference


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Photo: USDA Photo: Michael Neugebauer 1.6% DNA difference 1.2% DNA difference


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Original DNA


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Original DNA Mutation


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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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spots: transposon jumps purple: no transposon yellow: transposon inserted Photo: Damon Lisch


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spots: transposon jumps purple: no transposon yellow: transposon inserted Photo: Damon Lisch


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Photos: Cold Spring Harbor Laboratory Press transposon no transposon


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AA TT GG AG CC TT AA CT GG GG CC TT


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AA TT GG AG CC TT AA CT GG GG CC TT


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AA TT GG AG CC TT AA CT GG GG CC TT


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AA TT GG AG CC TT AA TC GG AG CC TT AA CT GG GG CC TT


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traditional (landrace) AA TT GG AG CC TT AA CT GG AA CC TT AA CC GG AG CC TT AA CT GG GG CC TT


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modern industrial corn AA CC GG GG CC TT


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modern industrial corn AA CC GG GG CC TT AA CC GG GG CC TT


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Modern Industrial Corn AA CC GG GG CC TT AA TT GG AA CC TT


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Modern Industrial Corn AA CC GG GG CC TT AA CT GG GA CC TT AA TT GG AA CC TT


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Modern Industrial Corn AA CC GG GG CC TT AA CT GG GA CC TT AA CT GG GA CC TT AA TT GG AA CC TT


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Modern Industrial Corn AA CC GG GG CC TT AA CT GG GA CC TT AA TT GG AA CC TT


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maize or maize teosinte Zea mays ssp. mays Zea mays ssp. parviglumis F1 George Beadle Beadle 1979 Field Museum of Natural History Bulletin


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maize or maize teosinte Zea mays ssp. mays Zea mays ssp. parviglumis modern corn teosinte parviglumis teosinte mexicana Matsuoka 2002 PNAS F1


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modern corn teosinte parviglumis teosinte mexicana Matsuoka 2002 PNAS


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Photos: Matt Hufford, Brandon Gaut, John Doebley


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modern corn teosinte teosinte


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modern corn teosinte


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modern corn teosinte


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modern corn 01 010 0010 01011 01111 10 reconstructed ancestral corn


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modern corn 01 010 0010 01011 01111 10 reconstructed ancestral corn


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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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Tularosa Cave Highland Route Pacific Route modern Chapalote modern Palomero


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3,000 yrs Highland Route Pacific Route modern Chapalote modern Palomero


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3,000 yrs 2,000 yrs 1,000 yrs Highland Route Pacific Route modern Chapalote modern Palomero


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3,000 yrs 2,000 yrs 1,000 yrs 700 yrs Highland Route Pacific Route modern Chapalote modern Palomero


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01 010 0010 01011 01111 10


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