A History of Agriculture in India v1.c23.s8.9
A History of Agriculture in India v1.c23.s8.9
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v1.c23.s8.9
Most species of *Oryza* are diploid, with 2n=24 chromosomes. The diploids are distributed in the tropics of Asia and Africa, whereas the tetraploids are to be found in the tropics of America as well as of the Old World.