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GGR329H5 (19)
Lecture 5

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Pierre Desrochers

Lecture 5: Early farmers didn’t understand genetics, but began selecting for: Size, taste (bitterness; poisonous), fleshiness, oiliness, fiber length But what is good for humans might not necessarily be good for plant survival in the wild Other types of changes not involving conscious choices 1) Wild mechanisms for the dispersal of seeds -humans selected mutants that would not have survived in the wild (peas, lentils, flax and poppies, wheat and barley) without humans looking out for it 2)Speed and simultaneousness of seed sprouting -humans looked for opposite of nature, which has germination inhibitors to prevent quick and simultaneous germination -tilling and watering helped change that -cumulative process 3) Plant reproduction -try to reproduce the original “good mutant” especially those that do not reproduce themselves. To make farming attractive: need to package and not single plant/animal -3 case studies: Fertile Crescent, New Guinea, Eastern United States Fertile Crescent vs other Mediterranean zones 1) Larger area 2) greatest climatic variations (season to season, year to year) 3) Wide range of altitudes and top
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