indica and japonica subspecies

Asian cultivated rice (Oryza sativa L. ) mainly includes Indica and Japonica subspecies and the F_1 hybrid between the two subspecies has great potential heterosis, which can be exploited to increase rice yield.
亞洲栽培稻主要分爲粳稻和秈稻兩個亞種。 水稻秈粳亞種間襍種F_1具有強大的襍種優勢,利用秈粳亞種間的襍種優勢能夠大幅度提高水稻的産量。