用１５～７０Ｇｙ剂量辐照处理早籼稻广陆矮四号生殖细胞不同发育阶段植株，Ｍ１代表现出花粉母细胞期植株的辐射敏感性最强，其次是减数分裂、幼嫩单核期，而单核花粉阶段的敏感性较差。减数分裂期植株经２５～５０Ｇｙ辐照后，Ｍ１代异常四分体出现频率为１００％～４７６％，异常花粉率为３１４％～７７８％。在１５～５０Ｇｙ剂量范围内，Ｍ２代植株分离为正常株、半不育株、高不育株及全不育株等多种类型，其中非正常结实株率随着辐照剂量的增加而增高。Ｍ２代半不育株在Ｍ３代仍分离出约占总株数１／３左右的半不育株，Ｍ２代高不育株在Ｍ３代也能分离出少数正常株，但多为高不育株。 At 15 ~ 70Gy dose irradiation, the germination cells of early indica rice Guanglu Dwarf Fourth germ cell at different developmental stages showed that M1 showed the strongest radiation sensitivity of pollen mother cell stage plants, followed by meiosis, young mononuclear stage, The mononuclear pollen stage is less sensitive. After 25 ~ 50Gy irradiation, the frequency of abnormal tetrad in M1 generation was 100% ~ 476% and that of abnormal pollen was 314% ~ 778%. In the range of 15 ~ 50Gy, the M2 plants were separated into many types, including normal, semi-sterile, high-sterile and all-sterile plants. The rate of abnormally stubbled plants increased with the increase of radiation dose . Semi-sterile plants of M2 generation still separated about 1/3 of the total number of semi-sterile plants in M3 generation. M2-type high-sterile plants could also isolate a few normal plants in M3 generation, but most of them were highly sterile plants .