四川及南亚水稻恢复系的聚类分析及类群比较

Clustering Analysis and Comparison Groups on Rice Restorer Lines of Sichuan Province and South Asia

本文通过对以四川地区为主的水稻恢复系和以印度为主的南亚水稻恢复系进行聚类和分析,结果表明:①构成两个不同生态区水稻变化的主要因子是粒数因子、粒长因子、籽粒因子、生育因子和糙米因子,它们的累积贡献率为85.05%;②品种聚类结果与来自不同地域自然形成的品种生态型具有较高的一致性。以四川品种为主构成的类群Ⅰ,有23.1%的品种来自南亚区域;同样,以南亚品种为主构成的类群Ⅱ,也有14.8%品种来自四川区域;③在15个农艺性状中,除有效穗是类群Ⅱ大于类群Ⅰ以外,其它14个性状均为类群Ⅰ大于类群Ⅱ;④群类Ⅰ和类群Ⅱ的不同特点是第一主成分的主导因子不同,前者为粒长因子,后者为实粒数因子;而它们的共同之点是第二主成分的主导因子是相同的,均为穗长因子。

Based on clustering analysis of the hybrid rice restorer lines mainly developed in Sichuan and India of South Asia,the results showed that：（i） the change of two different rice ecological zone was made by the main factors grains number,grain length,grain,growth and brown rice,and their cumulative contribution rate was 85.05 %.（ii） clustering results from different regions and natural ecosystem had deep consistency.23.1 % varieties were from the South Asian in groupⅠcomposed by Sichuan-based species;Similarly,14.8 % varieties were from the Sichuan region in group Ⅱconstituted by the main varieties of South Asian;（iii） in 15 agronomic traits,in addition to effective panicles in group II was greater than that in group I,other 14 traits in group I were greater than that in groupⅡ;（ⅳ） the different characters in groupⅠand groupⅡ were the first principal components,grain length was main component in group I and group II was grain number;and the second principal component was the same as panicle length factor in two groups.