阳春砂道地种质资源表型多样性分析与高产种质筛选OA

To comprehensively evaluate and select superior Amomum villosum Lour.germplasms,this study utilized 21 germplasms from the authentic producing region as experimental materials.A precise identification of 60 phenotypic traits was conducted,followed by a comprehensive assessment of the A.villosum germplasms through genetic diversity analysis,variation analysis,correlation analysis,cluster analysis,and principal component analysis.The results indicated that the genetic diversity of quantitative traits(H'=2.00)was higher than that of qualitative traits(H'=0.43).The coefficient of variation(CV)of quantitative traits ranged from 1.92％to 73.62％,with an average of 22.21％,demonstrating rich genetic diversity in A.villosum.Correlation analysis revealed a significant association between the relative length of filaments to styles and the internal spatial configuration of A.villosum florets.Principal component analysis converted 13 yield-related traits into 5 principal components,or comprehensive factors,which account for a cumulative contribution rate of 83.83％.Cluster analysis grouped the tested materials into three major clusters,with high-yielding germplasms concentrated in the second cluster.Based on F-value,five germplasms with superior phenotypic traits were selected,all of which exhibited high-yield potential and are worthy of further exploitation and utilization.This study provides an important foundation for evaluating A.villosum germplasm resources and breeding new varieties.