BIOB38H3 Lecture Notes - Lecture 2: Selective Breeding, Tillage, Herbivore
Document Summary
Lectures 3 and 4 plant domestication altered plant traits. Domestication an introduction: cultivated plants and animals were selected by humans with the objective of making the plant or animal more desirable in a certain way (ex. Pre-existing variability of traits: heritability of certain traits. Increased fitness because of traits: environmental tolerance, dispersal characteristics to promote progeny, biotic defence, competitive ability. => take plants, burn other vegetation, tend to the plant and defend against herbivores. => populations start to dwindle (exceed carrying capacity. => preparing fields, clearing land, tilling the soil, weeds. Step 4: domesticated plants, would not survive in the wild anymore. Semester: winter 2019: the following plant traits were altered over the course of the domestication process, and each will be explored in more detail, reduction of seed dispersal. 2: loss of dormancy, life cycle from perennial to annual, more compact growth habit. 6: reproduction from outcrossing (sexual) to selfing (asexual)
