简单遗传的雄性不育自发突变体已在五十年代报道,但大多数异交结实少,且很少表型异型杂交。本研究以诱发适应性广的半矮秆品种为基础,重点研究部分不育株的选择及雄性不育突变体异型杂交的结实率。材料和方法雄性不育系的分离:1977年夏天,将半矮秆粳稻品种 M-101的种子(约100000粒)、用~(60)Co(30kR)处理、种植在加利福尼亚戴维斯水稻改良研究所中,混合收获 X_1群体。 Simple genetic male sterility spontaneous mutants have been reported in the fifties, but most of the outcrosses are few and few are phenotypically heterozygous. In this study, based on the semi-dwarf varieties with wide adaptability, the selection of partial sterile plants and the seed setting rate of male sterile mutant heterosis were mainly studied. MATERIALS AND METHODS Separation of Male Sterile Lines: In the summer of 1977, the seeds of about 100000 seeds of semi-dwarf japonica rice M-101 were treated with ~ (60) Co (30kR) and grown in California Davis Rice Improvement Institute, mixed harvest X_1 population.