论文部分内容阅读
采用Ｈｅ－Ｎｅ激光和Ｎ２激光辐照小麦干种子，研究小麦Ｌ２代主要性状的遗传变异。结果表明，激光和６０Ｃｏ－γ诱变后代的变异程度不同，差异明显。Ｈｅ－Ｎｅ激光和Ｎ２激光诱变后代的变异随照射时间的增加而加大。不同激光和６０Ｃｏ－γ处理诱变后代的变异大小顺序是：激光与６０Ｃｏ－γ复合处理＞６０Ｃｏ－γ处理＞激光处理。由籽粒产量、株高及籽粒产量和旗叶长构成的选择指数，其遗传进度的相对效率比籽粒产量直接选择高２９．８５％和２９．０８％，且仅涉及两个性状，实用性强，为较优选择指数。
The wheat seeds were irradiated by He-Ne laser and N2 laser to study the genetic variation of the main characters of wheat L2. The results showed that there was a significant difference in the degree of variation among generations of 60Co-γ mutagenesis. The variation of He-Ne laser and N2 laser induced offspring increased with the irradiation time. The variation order of the offsprings of different laser and 60Co-γ treatment was: laser treatment with 60Co-γ> 60Co-γ treatment> laser treatment. The selection index of grain yield, plant height, grain yield and flag leaf length showed that the relative efficiency of genetic progress was 29.85% and 29.08% higher than the direct selection of grain yield, and only two traits were involved, and the practicality was strong , For the better selection index.