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Position: Home > Articles > Prospects of utilization of inter-subspecific heterosis between indica and japonica rice Journal of Integrative Agriculture 2020,19 (1)

Prospects of utilization of inter-subspecific heterosis between indica and japonica rice

作者：

Zhang Gui-quan

单位：

South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Guangdong, Peoples R China

关键词：

heterosis;reproductive isolation;hybrid sterility;genetic basis;molecular mechanism;subspecies;hybrid rice

摘要：

The Asian cultivated rice (Oryza sativa L.) grown worldwide is divided into two subspecies, indica and japonica. It is well known that the heterosis of inter-subspecies is usually stronger than that of intra-subspecies. Since the 1970s, indica hybrid rice, an intra-subspecific hybrid rice, has being widely used in China and even in the world. However, the inter-subspecific hybrid rice between indica and japonica is still unavailable. The major obstacle is the hybrid sterility of the inter-subspecies. In recent decades, the genetic and molecular basis of indica-japonica hybrid sterility was understood more and more clearly. Some breeding approaches for overcoming inter-subspecific hybrid sterility were proposed and used to develop the indica-japonica hybrid rice. The updated understanding will offer new approaches for development of breeding lines for overcoming indica-japonica hybrid sterility, which facilitates developing of inter-subspecific hybrid rice.

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Prospects of utilization of inter-subspecific heterosis between indica and japonica rice

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