domestication of crops

adaptive syndrome of domestication

traits that emerge in plants that are specifically bred for human use

may be deliberate or not (unconscious)

due to change in selective environment and control over reproduction

domestication syndrome traits

reduce seeds or fruit dispersal mechanism

increase number of seeds

reduce seed dormancy

divert biomass to the part used by humans

reduce toxic or unpleasant compounds

sometimes divergent selection for different uses

domestication

genetic changes in plant (or animal) populations as a response to selective pressures of cultivation and harvest by humans 

human influence → 

changes in genetics of plant population 

shattering and non shattering grain in archeology

wild: smooth break at abscission layer

domesticated: rough break where grain was torn off

divert biomass to parts used by humans

make fruits bigger on purpose