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2015 SF Exploratorium Lecture: "Corn: Diversity and Origins"

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Public lecture at the San Francisco Exploratorium on corn. Part of their Science of Food series http://www.exploratorium.edu/press-office/press-releases/science-food-series-launches-exploratorium

Publicada em: Alimentos, Ciências
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2015 SF Exploratorium Lecture: "Corn: Diversity and Origins"

  1. 1. Corn: Diversity and Origins Jeffrey Ross-Ibarra @jrossibarra • www.rilab.org University of California, Davis Photo: Jason Wallace
  2. 2. tassel (male) ear (female) Photo: U. Nebraska-Lincoln corn (maize)
  3. 3. tassel (male) ear (female) Photo: OllieMartin Photo: U. Nebraska-Lincoln corn (maize)
  4. 4. tassel (male) ear (female) Photo: OllieMartin Photo: U. Nebraska-Lincoln Photo: © HD WIlson corn (maize)
  5. 5. Photo: Rosana Prada
  6. 6. Photo: https://www.flickr.com/photos/croptrust/
  7. 7. Photo: https://www.flickr.com/photos/dandelion-and-burdock/
  8. 8. A C T G
  9. 9. Photo: Michael Neugebauer 1.2% DNA difference Photo: USDA
  10. 10. Photo: Michael Neugebauer 1.2% DNA difference1.6% DNA difference Photo: USDA
  11. 11. Original DNA
  12. 12. Mutation Original DNA
  13. 13. Original DNA Transposon Barbara McClintock 1902-1992
  14. 14. Original DNA Transposon Barbara McClintock 1902-1992
  15. 15. Original DNA Transposon
  16. 16. Photo: Damon Lisch
  17. 17. purple: no transposon Photo: Damon Lisch
  18. 18. purple: no transposon yellow: transposon inserted Photo: Damon Lisch
  19. 19. purple: no transposon yellow: transposon inserted spots: transposon jumps Photo: Damon Lisch
  20. 20. purple: no transposon yellow: transposon inserted spots: transposon jumps Photo: Damon Lisch
  21. 21. no transposon Photos: Cold Spring Harbor Laboratory Press transposon
  22. 22. A T G A C T A T G G C T A C G G C T A T G G C T
  23. 23. A T G A C T A T G G C T A C G G C T A T G G C T
  24. 24. A T G A C T A T G G C T A C G G C T A T G G C T
  25. 25. A T G A C T A T G G C T A C G G C T A T G G C T A T G A C T A C G G C T
  26. 26. A T G A C T A T G G C T A C G A C T A T G A C T A C G A C T A C G G C T A C G G C T A T G G C T traditional (landrace)
  27. 27. A C G G C T A C G G C T modern industrial corn
  28. 28. A C G G C T A C G G C T A C G G C T A C G G C T modern industrial corn
  29. 29. A C G G C T A C G G C T A T G A C T A T G A C T Modern Industrial Corn
  30. 30. A C G G C T A C G G C T A T G A C T A T G A C T A C G G C T A T G A C T Modern Industrial Corn
  31. 31. A C G G C T A C G G C T A T G A C T A T G A C T A C G G C T A T G A C T A C G G C T A T G A C T Modern Industrial Corn
  32. 32. A C G G C T A C G G C T A T G A C T A T G A C T A C G G C T A T G A C T Modern Industrial Corn
  33. 33. Beadle 1979 Field Museum of Natural History Bulletin maize or F1 teosinte Zea mays ssp. parviglumis maize Zea mays ssp. mays George Beadle
  34. 34. maize or F1 teosinte Zea mays ssp. parviglumis maize Zea mays ssp. mays teosinte parviglumis teosinte mexicana modern corn Matsuoka 2002 PNAS
  35. 35. teosinte parviglumis teosinte mexicana modern corn Matsuoka 2002 PNAS
  36. 36. Photos: Matt Hufford, Brandon Gaut, John Doebley
  37. 37. teosinte teosinte modern corn
  38. 38. modern corn teosinte
  39. 39. modern corn teosinte
  40. 40. modern corn reconstructed ancestral corn 01 010 0010 01011 01111 10
  41. 41. modern corn reconstructed ancestral corn 01 010 0010 01011 01111 10
  42. 42. Highland Route
  43. 43. Highland Route Pacific Route
  44. 44. Photo: Moenkopi Legacy Inn & Suites
  45. 45. Highland Route Pacific Route
  46. 46. Highland Route Pacific Route modern Chapalote modern Palomero
  47. 47. Highland Route Pacific Route modern Chapalote modern Palomero Tularosa Cave
  48. 48. Highland Route Pacific Route 3,000 yrs modern Chapalote modern Palomero
  49. 49. Highland Route Pacific Route 3,000 yrs modern Chapalote modern Palomero 2,000 yrs 1,000 yrs
  50. 50. Highland Route Pacific Route 3,000 yrs modern Chapalote modern Palomero 700 yrs2,000 yrs 1,000 yrs
  51. 51. 01 010 0010 01011 01111 10

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