贵州100份芥菜型油菜种质资源表型鉴定及聚类分析

Phenotypic Identification and Cluster Analysis of 100 Different Accessions of Brassica juncea Germplasms in Guizhou Province

本研究对贵州省内收集到的100份芥菜型油菜种质资源材料进行田间种植鉴定,并对12个主要性状进行了调查,采用相关性分析、主成分分析、聚类分析等方法对其进行综合评价。结果表明,12个性状的变异系数在11.73%~42.73%之间,其中第一有效分枝部位、一次有效分枝数、主花序有效长度、分枝有效角果数、分枝习性、种皮颜色等遗传变异较为丰富,角果长度、每角粒数、千粒重多样性较差。相关性分析显示,12个性状间存在不同程度的相关性。主成分分析中前5个因子的累积贡献率为69.29%。通过基于表型性状的聚类分析油菜种质资源被分为两个大类、8个簇,具有较好的多样性。

In this study,100 different accessions of Brassica juncea germplasm in Guizhou Province were identified in the field planting,and 12 main agronomic traits were investigated.Comprehensive evaluation was conducted by correlation analysis,principal component analysis,cluster analysis.The results showed that the coefficient of variation of the 12 traits ranged from 11.73%to 42.73%,of which.And the genetic variation of the first effective branch part,the number of effective branch first time,the length of main inflorescence,the number of effective sill on the branch,the branching habit and the seed coat color were abundant.The diversity of pod length,number of seeds per pod and 1000 grain weight was poor.The correlation analysis showed that there were correlation among 12 traits to different degrees.The contribution rate of the first five factors in principal component analysis was 69.29%.According to the cluster analysis based on phenotypic traits,rapeseed germplasm resources were divided into two categories and 8 clusters,which showed good diversity.