湖北光敏感细胞核雄性不育水稻至今最高世代已在20代以上,虽经长期单株选择,群体的不育性仍在分离之中,本试验阐明造成这种分离的原因是这种雄性不育的遗传特性和小育基因所处的遗传背景密切相关。遗传背景不同,育性分离的模式也不相同,因而表现为同一杂交组合后代经连续多代单株选择的株系内仍有育性分离。因为由不育株后代不断分离出可育株,这种雄性不育特性不可能用来生产杂交种子。 The highest generation of light-sensitive nuclear male sterile rice in Hubei has been above 20 generations so far. Although the selection of long-term single plants, the sterility of the population is still being separated. The reason for this separation in this experiment is that this male sterility The genetic characteristics are closely related to the genetic background of the gene. Different genetic backgrounds, fertility patterns of separation are not the same, so the performance of the same cross combination of offspring after successive generations of plants selected strains still fertility separation. Because sterile plants are continuously separated from offspring of sterile plants, this male sterility trait can not be used to produce hybrid seeds.