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This Concept Map, created with IHMC CmapTools, has information related to: ECL 222 Oct 24, Crop Diversity early works include, include Vavilov origin vs. diffusion, not knowing what to count depends who you ask agronomists, include Vavilov presence of wild relatives, cultivars selected for how they look ie. leaf shape, so many varieties of the same species perhaps environmental heterogeneity, include Darwin variation of animals and plants under domestication, distribution of diversity why not more evenly distributed, is useful in other ways for reputation, Crop Diversity Readings selection for perceptual distinctiveness, cultivars selected for how they look not for utility (according to author), centers of origin eg maize from teosinte, for utility (according to author) but they are selected for distinctiveness, variation of animals and plants under domestication artificial selection methodical/ concious, origin vs. diffusion 10 centers of origin, unconcious eg selecting for one trait that is linked to another trait you are not slecting for, distribution of diversity why so many varieties of the same species, is useful in other ways for maintenance of diversity (as a form of wealth), because there are close wild relatives as genetic sources egs pearl millet, Crop Diversity efforts to preserve worldwide agricultural genetic diversity