水稻产量的基因型×环境互作分析及生态类型区的划分

AN ANALYSIS OF GENOTYPE×ENVIRONMENT INTERACTION ON GRAIN YIELD AND THE DIFFERENTIATION OF ECOLOGIC TYPE REGION IN RICE

用方差分桥和稳定性分析法,研究了两年共9个水稻品种在不同生态环境下的产量表现。结果表明:产量变异中环境效应最重要,基因型×环境互作效应次之,基因型效应居第;产量基因型值和环境效应值在年份间变化趋势一致,而基因型×环境互作效应在年份间的变化趋势不同;品种在多地点上的稳定性因年份不同而异;不同基因型的丰产性和稳产性不同,桂朝2号在这两方面最好,A311次之,两年结果一致。本文还在基因型×环境互作分析的基础上,探讨了以多个基因型平均产量为指标划分生态类型区的可行性,并用系统聚类分析法把18个地点分为4个生态类型区,结果与中国稻作区划大体一致。

By means of the variance analysis and the stability analysis, the yield performance of 9 new varieties of rice, their G × E interaction and stability in grain yield were studied on 19 locations in South China in 2 years. It was shown that the environmental effect was the most important factor that the GxE interaction was the second and the following was genotype, and that all these items were highly significant in the variation of grain yield. The stability and yield potential was different among varieties, and Guichao No. 2 was the best, A311 was the second. The yield stability of variety was related with GxE interaction and varied with the duration of years. The genotype and enviconment effects had the same variation trend in the 2 years. On the bases of the analyses mentioned abovve, the probability and availability of differentiating ecologic-type region according to the average yield for all varieties were discussed. The 18 sites were divided into 4 ecologic-type regions by hierachical clustering method.