2015 sf exploratorium lecture: "corn: diversity and origins"
TRANSCRIPT
Corn: Diversity and Origins
Jeffrey Ross-Ibarra @jrossibarra • www.rilab.org University of California, Davis
Photo: Jason Wallace
tassel (male)
ear (female)
Photo: U. Nebraska-Lincoln
corn (maize)
tassel (male)
ear (female)Photo: OllieMartin
Photo: U. Nebraska-Lincoln
corn (maize)
tassel (male)
ear (female)Photo: OllieMartin
Photo: U. Nebraska-Lincoln
Photo: © HD WIlson
corn (maize)
Photo: Rosana Prada
Photo: https://www.flickr.com/photos/dandelion-and-burdock/
ACTG
Photo: Michael Neugebauer
1.2% DNA difference
Photo: USDA
Photo: Michael Neugebauer
1.2% DNA difference1.6% DNA difference
Photo: USDA
Original DNA
Mutation
Original DNA
Original DNA Transposon
Barbara McClintock 1902-1992
Original DNA Transposon
Barbara McClintock 1902-1992
Original DNA Transposon
Photo: Damon Lisch
purple:no transposon
Photo: Damon Lisch
purple:no transposon
yellow:transposon
inserted
Photo: Damon Lisch
purple:no transposon
yellow:transposon
inserted
spots:transposon jumps
Photo: Damon Lisch
purple:no transposon
yellow:transposon
inserted
spots:transposon jumps
Photo: Damon Lisch
no transposon
Photos: Cold Spring Harbor Laboratory Press
transposon
A TG AC T
A TG GC T
A CG GC T
A TG GC T
A TG AC T
A TG GC T
A CG GC T
A TG GC T
A TG AC T
A TG GC T
A CG GC T
A TG GC T
A TG AC T
A TG GC T
A CG GC T
A TG GC T
A TG AC T
A CG GC T
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)
A CG GC T
A CG GC T
modern industrial corn
A CG GC T
A CG GC T
A CG GC T
A CG GC T
modern industrial corn
A CG GC T
A CG GC T
A TG AC T
A TG AC T
Modern Industrial Corn
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
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
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
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
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
teosinte parviglumis
teosinte mexicana
modern corn
Matsuoka 2002 PNAS
Photos: Matt Hufford, Brandon Gaut, John Doebley
teosinte teosinte
modern corn
modern corn
teosinte
modern corn
teosinte
modern corn
reconstructed ancestral corn
01010
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modern corn
reconstructed ancestral corn
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10
Highland Route
Highland Route
Pacific Route
Photo: Moenkopi Legacy Inn & Suites
Highland Route
Pacific Route
Highland Route
Pacific Route
modern Chapalote
modern Palomero
Highland Route
Pacific Route
modern Chapalote
modern Palomero
Tularosa Cave
Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
2,000 yrs 1,000 yrs
Highland Route
Pacific Route
3,000 yrs
modern Chapalote
modern Palomero
700 yrs2,000 yrs 1,000 yrs
01010
0010 01011 01111
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