BIO220H1 Lecture Notes - Lecture 14: Genetic Marker, Wheat Beer, Food Energy
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BIO220H1 Full Course Notes
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Bio220: lecture 14 part 1 genetic diversity in agricultural systems. The world has 50,000 edible plants and 60% of food energy that humans use only comes from 3 species: rice, maize, wheat. We know something about how agriculture wheat, rice, and we know their ancestors and we know that they"re very diverse. Vavilov: center of origins crops originated in areas where the diversity of their wild relatives is greatest. A lot of this was driven by crops that was domesticated and developed in the fertile crescent" (ex barley, wheat= beer, grapes= wine: problem: vavilov was russian at the time, and the main competing plant biologist was lysenko. Lysenko discovered vernalization" early flowering in biennial crops could be produced or stimulated by cold treating them. So many plants that have to go through winter has mechanisms that sense when winter has passed. So vernalization occurs, and all of the epigenetic modifications that occurred are reset at meiosis.
