山西谷子种质资源表型性状鉴定及综合评价OA北大核心CSTPCD

The genetic variation patterns of foxtail millet germplasm resources in different ecological regions of Shanxi are still unclear,making it difficult to effectively utilize these resources in breeding.In order to study the genetic diversity of phenotypic traits in foxtail millet,we identified 14 phenotypic traits in 5 environments of 603 foxtail millet germplasm resources from Shanxi province from 2018 to 2020.Normal distribution tests,correlation analysis,principal component analysis,cluster analysis and comprehensive evaluation were conducted.The results showed that the distribution of the traits was normal or approximately normal in different environments.The genetic diversity index ranged from 1.971 to 2.090 at 5 points over three years,with the single spike weight being the highest(2.076).The variation coefficient ranged from 7.74%to 33.87%,with the average variation coefficient of grain weight per spike being the highest(30.38%).The 603 Shanxi foxtail millet germplasm resources were divided into 3 groups by cluster analysis.Correlation analysis revealed varying degrees of correlation among the phenotypic traits.The 1000-grain weight was significantly negatively correlated with the days of heading,neck length and yard number(P<0.001).The 14 phenotypic traits were classified into 6 principal components by principal component analysis,with a cumulative contribution rate of 84.95%.The average F-value of phenotypic traits was 0.516,with the highest F-value of Hongliusha from Lvliang(CC599)at 0.685 and the lowest F-value of Longgu from Shuozhou(National Treasury number:00015941)at 0.242.Six traits,including plant height,leaf length,grain weight per plant,item node number,panicle length,and leaf width were selected as key indexes for the identification of the phenotypic traits and screening of superior germplasm resources.This study shows that Shanxi foxtail millet germplasm resources exhibit rich variation and a high genetic diversity index,providing diverse materials for foxtail millet germplasm improvement and variety breeding.