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通过 60Co γ辐照与NaN3复合处理及外加成熟胚培养 ,对得到的珍汕 97A和HN5s育性恢复突变体突变率进行了比较 ,且对育性恢复突变体自交后代不育株的花粉败育类型、光敏不育株的不育特征进行了分析。结果表明不育系经过诱变处理可以发生 :1 .不育株向可育株的转变 ;2 .不育株的败育类型由典败向无花粉型、圆败及染败的转变 ;3.光敏不育株可转变为温敏不育株。由此提出光敏核不育系育性漂移主要是不育基因发生育性恢复突变 ,又在自交、杂交过程中累积的结果。
The mutation rates of fertility restorer mutants of 97A and HN5s of Zhenshan 97S and HN5s were compared by 60Co γ irradiation combined with NaN3 treatment and the addition of mature embryos. The types of sterile, sterile male sterile plants were analyzed. The results showed that the male sterile lines could be mutagenized: 1. The transformation of sterile plants to fertile plants; 2. The abortion types of sterile plants changed from classic to non-pollen type, round failure and defeat; 3. Photosensitive sterile plants can be transformed into temperature-sensitive sterile plants. Therefore, it is proposed that the fertility drift of photo-sensitive genic male sterile lines is mainly the result of fertility restore mutation of sterile genes and the accumulation in selfing and hybridization.