以珍汕 97A为材料 ,通过不同剂量的 6 0 Co- γ射线和 Na N3药剂对珍汕 97A进行复合处理 ,分析研究它们的诱变效应。结果表明 ,随着辐射剂量的增加 ,M1群体中的育性恢复突变率有所下降 ;而分离出不育株的 M2 株系占育性恢复突变 M1株系的比例逐渐增加 ;与珍汕97A相比 ,M2 分离出的不育株有的仅发生农艺性状的变异 ,有的则在不育性的表达和农艺性状上均发生变异 ;与珍汕 97B相比 ,育性恢复的 M2 群体部分农艺性状发生了多种变异 ,并在M2 群体中出现了无花粉型不育株及弯秆突变体。此外 ,还讨论了诱变技术对不育系的改良与创新的有关问题。 Taking Zhenshan 97A as material, the Zhenshan 97A was treated with different dosages of 60 Co-γ rays and Na N3 to study their mutagenic effects. The results showed that with the increase of radiation dose, the mutation rate of fertility restoration in M1 population decreased, while the proportion of M2 lines with sterile restorer lines in M1 strain increased gradually. Compared with the Zhenshan97B, the M2 groups with fertility restoration were only partially agronomic traits, while others showed variation in both the sterility and agronomic traits. Variation occurred in agronomic traits, and pollen-type sterile plants and bent stalk mutants appeared in the M2 population. In addition, the problems related to the improvement and innovation of CMS were also discussed.