春甘蓝育种材料主要农艺性状主成分分析与聚类分析

为春甘蓝目标性状的改良提供科学依据。对10份春甘蓝育种材料9个农艺性状进行变异分析、相关性分析、主成分分析和聚类分析。结果表明,中心柱长的变异系数最大,球宽的变异系数最小;相关性分析中心柱长与其他8个农艺性状的相关程度为：株高>球长>外叶长>开展度>外叶宽>单球重>球宽>外叶数;主成分中前4个主成分累计贡献率达93.76%;将10个育种材料分为3个群体,第Ⅰ群体包括S1和S10,第Ⅱ群体包括S2、S3、S4、S8和S9,第Ⅲ群体包括S5、S6和S7,各群体间差异比较明显。可利用主成分与聚类分析对春甘蓝农艺性状进行分析和综合评价,筛选出优良的亲本材料,为育种工作提供理论基础。

Main Agronomic Traits of Spring Cabbage Breeding Materials: Principal Component Analysis and Cluster Analysis

To provide a basis for the target trait improvement of spring cabbage, the variation analysis, correlation analysis, principal component analysis and cluster analysis were conducted based on 9 agronomic characters of 10 spring cabbage breeding materials. The results showed that the variation coefficient of core length was the highest and the ball width was the lowest. The correlation between the core length and the other 8 agronomic traits was as follows: plant height > head length > length of outer leaf > plant breadth > width of outer leaf > head weight >head diameter>number of outer leaf. The accumulation contribution rate of the top four principal components was up to 93.76%. Cluster analysis divided 10 breeding materials into 3 groups, groupI included S1 and S10, groupII included S2, S3, S4, S8 and S9, group III included S5, S6 and S7, and the differences among the groups were obvious. The principal component and cluster analysis could be used to analyze and comprehensively evaluate the agronomic traits of spring cabbage, to screen out excellent parental materials and provide a basis for breeding.