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The culivated rice (Oryza sativa L. )is known to contain two major scb-species, indica (O. sativa L. ssp.indica) and japonica (O. sativa L.japonica )ssp. japonica). The indica andjaponica differentiation resulted insignifficance of hybrid sterility andhybrid breakdown, which are barriersof gene flow between the two majorsubgene pools within O. sativa.
The indica and japonica species derived from two major scb-species indica (O. sativa L. ssp. Indica) and japonica (O. sativa L. japonica) ssp. Japonica) insignifficance of hybrid sterility and hybrid breakdown, which are barriers of gene flow between the two majorsubgene pools within O. sativa.