White on rice dating website
Communities that foraged wild, shattering rice seeds would likely gather them before maturity since most of the mature grains quickly fall to the ground.Immature rice grains have a smaller width than fully mature seeds, because rice grains reach their full length early in seed development, and subsequent grain filling increases the width of the seeds.
Genetic loci that were selected from existing genetic variation in the wild species may appear fixed within domesticated rice, but will show variation within the wild rices.
The distribution and evolutionary history of these genes gives insight into the domestication process and the relationship between the subspecies., African rice, both of which have unique domestication histories. Wild rices typically display long awns and severe shattering for seed dispersal, whereas the domesticated type have short awns if any and reduced shattering to maximize the number of seeds that can be harvested.
In order to examine the variation selected by humans over our long relationship with rice, we must first look at the ancestors of our modern cultivars. Dormancy levels are higher in the wild rices, allowing viable seeds to persist for years before germination, but these have been reduced in cultivars to give uniform germination.
Genes influencing these traits and showing signs of ancient selection are considered domestication genes.
Linguistic evidence supports an African origin of , as rice words in several west African language families (malo, maro, mano, etc.) predate the Portuguese-derived words associated with Asian rice (Blench, 2006; Porteres, 1970).