Weedy rice, which differs genetically from wild and crop rice, is adapted for undercover life in agricultural fields
There are two major strains of weedy rice in the U.S.: strawhull and blackhull awned. (Awns are the long bristles that give some grasses a hairy appearance). Because the two weedy strains evolved independently, they provide an ideal opportunity to study the genetic basis of weediness and, particularly, whether it always arises through the same genetic mechanism.
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