四川地区57份香葱种质资源表型性状多样性综合评价OA

[Objective]This study aimed to identify phenotypic trait differences among chive germplasm resources from different regions and to screen superior germplasms.[Method]Fourteen qualitative traits and 9 quantitative traits of the 57 local chive germplasm resources from Sichuan were investigated,and comprehensive evaluation was conducted by genetic diversity analysis,correlation analysis,principal component analysis,and cluster analysis.[Result]The coefficient of variation(CV)for phenotypic traits of the 57 chive germplasm resources ranged from 0 to 39.78%.Among qualitative traits,leaf wax had the highest CV(39.78%);among quantitative traits,plant weight had the highest CV(28.54%).The diversity index(H')ranged from 0 to 2.098.Among qualitative traits,pseudostem bulge showed the highest H'(1.050);among quantitative traits,number of leaves per plant showed the highest H'(2.098).Correlation analysis revealed that plant weight showed an extremely significant positive correlation with 7 phenotypic traits including plant height,plant breadth,and number of leaves per plant,while it showed a signifi-cantly or extremely significant negative correlation with node density,tillering number,and pseudostem shape.Seven principal components were extracted from the 21 variable phenotypic traits via principal com-ponent analysis(PCA),with a cumulative contribution rate of 72.661%.These components mainly repre-sented key traits including yield,plant architecture,and leaf morphology.Based on the results of PCA,a comprehensive evaluation system was constructed,and the comprehensive scores of the germplasm re-sources ranged from-0.613 to 0.746.The chive germplasm resources were divided into 5 groups by clus-ter analysis,and the germplasm resources with higher comprehensive scores were mainly distributed in group I,group Ⅱ,and group Ⅲ.[Conclusion]Among the 57 chive germplasm resources,XC004(0.746)exhibited the best comprehensive performance,followed by XC044(0.631)and XC036(0.518),while XC054(-0.613)showed the worst.These findings provide a theoretical basis for the effi-cient utilization of chive germplasm resources and the breeding of new varieties.