Rice
Two species are important cereals for human nutrition:
Ecological diversification in Oryza sativa: two major ecographic races were differentiated as a result of isolation and selection:
A tremendous ecological diversity can be found in Asian cultivars evolved by natural and human selection (diverse climates, seasons and soils, varied cultural practices e.g. seeding vs. transplanting, cultural preferences and socioreligious traditions) (Rice almanac, 2002).
Asia and Oceania