Journal of Integrative Agriculture ›› 2020, Vol. 19 ›› Issue (1): 1-10.DOI: 10.1016/S2095-3119(19)62843-1

所属专题: 水稻遗传育种合辑Rice Genetics · Breeding · Germplasm Resources

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  • 收稿日期:2019-08-05 出版日期:2020-01-01 发布日期:2019-12-23

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

ZHANG Gui-quan   

  1. Guangdong Provincial Key Laboratory of Plant Molecular Breeding/State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/College of Agriculture, South China Agricultural University, Guangzhou 510642, P.R.China
  • Received:2019-08-05 Online:2020-01-01 Published:2019-12-23
  • Contact: Correspondence ZHANG Gui-quan, Tel/Fax: +86-20-85281175, E-mail: gqzhang@scau.edu.cn
  • Supported by:
    This research was supported by the National Natural Science Foundation of China (91435207 and 91735304) and the Project of Science and Technology of Guangzhou, China (201607020040).

Abstract:

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.

Key words: heterosis ,  reproductive isolation , hybrid sterility ,  genetic basis , molecular mechanism , subspecies ,  hybrid rice