关键词: 水稻（Oryza sativa L.）, 光温敏核不育系, 两系法杂交水稻, 育种策略

Abstract: The two-line hybrid rice（Oryza sativa L.） system based on the photoperiod-thermo sensitive genic male sterile （PTGMS） line is an important approach for rice heterosis utilization, and the development of the two-line hybrid rice has made an important contribution to guaranteeing food security in China. In this paper, we summarized the breeding research status of PTGMS rice, and pointed out the main problems in the breeding of PTGMS lines, including the single type of sterile genes and the slow progress of genetic research on the critical temperature of fertility transition. In response to those issues, the next development strategy was proposed, that is, to explore and make use of new genic male sterile resources, especially photoperiod sensitive genic male sterile resources in the indica genetic background, and to strengthen the research on the genes that regulate the critical temperature of fertility transition in male sterile lines. On this basis, molecular marker-assisted breeding should be used to improve the breeding efficiency of PTGMS lines and broaden the genetic basis of PTGMS germplasm.

Key words: rice （Oryza sativa L.）, photoperiod-thermo sensitive genic male sterile （PTGMS） line, two-line hybrid rice, breeding strategy