513份蚕豆种质资源主要农艺性状遗传多样性分析OA

The main agronomic traits of 513 faba bean germplasm resources at home and abroad were analyzed.The results showed that the coefficient of variation of 15 agronomic traits ranged from 13.09%to 53.58%,indicating that there was a large genetic variation.The coefficient of variation for the number of pods per plant reached the highest value of 53.58%,with a variation range of 1.00 to 42.00,whereas pod width exhibited the lowest coefficient of variation at 13.09%,varying from 0.80 to 2.23 cm.Correlations among traits highlighted that the number of branches,number of effective branches,number of pods per plant,number of grains per plant,plant height,and height of the last pod are key for developing high-yielding faba bean varieties.The principal component analysis extracted five principal components,with the cumulative contribution rate reaching 72.098%,effectively representing the phenotypic characteristics of these germplasm resources.By calculating the membership function values,a comprehensive score(F-value)was derived,and the top 30 germplasm resources with the best comprehensive traits were identified.The cluster analysis subsequently divided the 513 faba bean germplasm resources into three group:Cluster I included 160 resources(31.19%of the total),characterized by high plant height and yield;Cluster II comprised 221 resources(43.08%of the total),suitable as parental selection and screening of excellent genes;and Cluster III contained 132 resources(25.73%of the total),representing specific germplasm.