番茄ILs果实性状的主成分分析与聚类分析

Principal Component and Cluster Analysis Based on Fruit Traits in ILs of Tomato

利用以栽培番茄Lycopersicon esculentum(加工番茄M82)为背景创建的L.pennellii LA716渐渗系群体(ILs,introgression lines),对7个番茄果实主要性状进行了主成分和聚类分析。结果表明,7个果实性状可简化为3个主成分,分别为果实质量因子、果形因子和品质因子,累计贡献率85.435%。利用欧式距离,类平均法可将77份渐渗系分为3大类群,第Ⅰ类群包括70个渐渗系材料,在D=17.53的水平又可将第Ⅰ类群分为2个亚群,果实性状较好的材料主要集中在这个类群中;第Ⅱ类群包括1个材料,说明此材料的独特性;第Ⅲ类群包括6个材料。

The introgression line population,which was generated via processing tomato parent Lycopersicon esculentum M82 and a wild species L. pennellii LA716,was employed in this paper to evaluate seven fruit traits using principal component and cluster analysis. The results showed that these seven fruit traits were mainly composed of three independent principal components,including fruit weight factor,fruit shape factor and fruit quality factor,and the cumulative contribution of these three factors was 85. 435%. Furthermore,77 introgression lines could be divided into three groups by euclidean distance UPGMA method. The first group included 70 lines and could be divided into two sub-group at D = 17. 53 level. The second group included one lines,and the third group included six lines. The experimental result showed that the 70 lines with excellent fruit traits mostly belonged to group one.