430份谷子种质资源表型性状的遗传多样性分析OA

In order to systematically evaluate the genetic diversity of Setaria italica L.germplasm resources,phenotypic analysis was conducted on 14 quantitative traits and 6 quality traits of 430 Setaria italica L.samples.Combined with calculations of heritability,coefficient of variation,genetic diversity index,as well as correlation analysis,principal component analysis and cluster analysis,the phenotypic variation patterns and genetic diversity levels of the samples were analyzed and excellent core germplasm resources were selected.The results showed that the coefficient of variation of quanti-tative traits ranged from 9.48％to 104.76％,indicating a rich phenotypic variation,quality traits also showed high polymorphism.Genetic stability analysis revealed that plant height had the highest genetic stability,with a genetic stability of 0.94,followed by 1000-grain weight.The genetic diversity index of all quantitative traits was high,ranging from 5.38 to 6.06.Correlation analysis indicated that the main ear weight was highly significantly positively correlated with the main ear grain weight.The number of tillers was highly significantly negatively correlated with the main ear weight and main ear grain weight.Principal component analysis extracted 5 principal components,with a cumulative con-tribution rate of 70.49％.Based on the membership function method and principal component analy-sis,the best 20 germplasm resources were further selected.In summary,this study revealed that the evaluated Setaria italica L.germplasm resources had extensive genetic diversity,which could provide a material basis for the future breeding of new Setaria italica L.varieties.