A History of Agriculture in India v1.c23.s8.3

v1.c23.s8.3

Looking back in history and considering the evolution of cultivated rices it must be supposed that man took annual wild types (*nivara*, *breviligulata*), subjected them to the selection pressure of cultivation, harvesting and sowing and thereby gave rise to the *sativa* cultivars in Asia. The west African rice, *O. glaberrima*, represents the cultivated member of a series parallel to that occurring in Asia. There is no evidence of exchange between Asia and west Africa in prehistoric times to account for the existence of *O. glaberrima* and it must be accepted as a separate domestication.