早稻两系不育系播始历期和叶片数的稳定性分析OA

To investigate the growth period stability and utilization value of 10 long-grain high-quality early two-line rice sterile lines derived from Yuan 511S,these sterile lines were sown in 10 batches in Changsha,Hunan in 2024.The sowing-heading duration and total leaf number of the sterile lines under different sowing dates were measured.The stability of sowing-heading duration and leaf numbers under various sowing dates was analyzed using the coefficient of variation and the AMMI model.The results showed that as the sowing date was delayed,the sowing-heading duration of the sterile lines gradually shortened,while the leaf numbers initially decreased and then increased.The coefficient of variation(CV)for sowing-heading duration among the sterile lines under different sowing dates ranged from 5.84%to 11.97%,and that for leaf numbers ranged from 2.09%to 3.18%.Based on the Di values calculated from the genotype-environment interaction effects of sowing-heading duration using the AMMI model and the coefficient of variation,the tested sterile lines were clustered into three categories,and the production application characteristics of each type of sterile lines were discussed.The findings can serve as a reference for sowing date arrangements in hybrid seed production of newly selected sterile lines and provide a basis for further improvement of growth period-stable sterile lines.