关键词: 湖北光敏感核不育水稻, 雄性不育性稳定性, 遗传

Abstract: Since 1973, when the "Hubei Photoperiod-sensitive Male-sterile Rice" was discovered, fifteen years have passed. So far, this kind of male-sterile rice has not been used for producing hybrid seeds.Our studies have shown that this kind of male sterility is inherited in relation to the genetic background of the strain. The mode of segregation of this male sterility was different in various lines of the F₅ or F₇ generation derived from the same crossing. The majority of plants in various lines may be sterile, semi-sterile or fertile.The segregational proportions differ from the Mendelian mode in which selfed progenies of recessive individuals do not segregate.Plants of the F₅ or F₇ generation derived from the selected male-sterile plants continue segregating in later generations. Because of this segregation in the descendants of recessive individuals this kind of male sterile lines could not be used for hybrid seed production in rice.

Key words: Hubei Photoperiod-sensitive Genic Male-sterile Rice, Stability of male sterility