Correlation,Principal Component and Cluster Analysis for Agronomic Traits of Cauliflower Germplasm Resource
This study focused on 22 agronomic traits in 322 cauliflower inbred lines and performed the correlation,principal component and clustering analyses.The results of coefficient of variation indicated that length of the first curd stem,curd weight,maturity and plant weight exhibited larger CV values than other traits with 41.87％,34.80％,32.98％and 31.51％,respectively.Most of these 22 agronomic traits showed strong correlation,in which correlation coefficient between plant weight and curd weight was the strongest(R2=0.742).Principal component analysis de-monstrated that the cumulative contribution rate of the first 10 principal components was 82.41％.Plant growth,curd morphological structure and curd quality factors occupied the first,second and third principal components.Twenty germplasm resources were selected according to their contributions and scores of multiple factors.As a result,322 cauliflower inbred lines were clustered into 4 groups:extremely early maturity(group Ⅰ),late maturity(group Ⅱ);middle late maturity(group Ⅲ)and early maturity(group Ⅳ).However,they cannot be classified based on the curd compactness and their origin.In total,a comprehensive evaluation of the phenotype data from 322 cauliflower inbred lines provided valuable clues and contributed to cauliflower breeding in the near future.
NETL
NSTL
万方数据
