关键词: 水稻, 细胞核雄性不育, 遗传分析, 等位性, 光敏性, 可育临界, 温度, 育种方法

Abstract: 8902S is a photo-sensitive genic male-sterile (PGMS) line which has strong photo-sensitive male-sterility (PSMS) and relatively higher critical fertilith temperature point (CFTP). 2877S is a PGMS line which has strong PSMS and relatively lower CFTP. 2558S is a thermo-sensitive genic male-sterile (TGMS)line which has weak PSMS and low CFTP. They are all indica genic male-sterile (GMS) lines derived from the japonica PGMS line Nongken 58S. F₁ progenies of the crosses between the 3 lines all expressed stable sterility under long day and relatively lower temperature, which indicates that sterile major-genes of the 3 lines are allelic, and the F₁ is similar in CFTP to their low CFPT parents. The F₁ of the cross between PGMS lines 8902S and 2877S has as strong PSMS as its parents did, and F₁ between 8902S or 2877S and a TGMS line 2558S has medium PSMS which is medium type of their parents. Sterile plants in F₂ population of the cross between 2877S and 2558S present the high degree of sterility under long day and relatively lower temperature, most of them ar-fertile and many have very high seed setting rates under short day. Allelism of sterile major-genes of GMS lines derived from Nongken 58S and the methods of breeding appalicable PGMS lines are also discussed in this paper.

Key words: PADDY, NUCLEAR, MALE-STERILITY, GENETIC ANALYSIS, ALLELISM, PHOTO-SENSITIVE MALE-STETILITY, CRITICAL FERTILITY TEMPERATURE POINT, BREEDIMG METHOD