苦荞种质资源表型性状的遗传多样性分析

Diversity Analysis of Tartary Buckwheat Germplasms Based on Phenotypic Traits

为了解苦荞产量与农艺性状之间的关系,以26个苦荞种质资源为材料进行主要表型性状与产量的统计分析。结果表明:26个苦荞种质资源存在丰富的遗传变异,不同性状之间变异系数差异较大,变异系数最大的是主茎分枝数,为33.30%,变异系数最小的是生育日数,为6.13%。相关性分析表明,苦荞各性状之间存在不同程度的相关性,且大多数性状与产量呈正相关关系。主成分分析提取了前3个主成分,其累计贡献率达到89.55%。聚类分析将26个苦荞种质资源分为3类,第Ⅰ类综合性状不突出,第Ⅱ类属于高产型,第Ⅲ类属于矮秆型。

In order to understand the relationship between yield and agronomic traits of tartary buckwheat, statistical analysis were conducted between the main phenotypic traits and yields of 26 difference tartary buckwheat germplasm resources in this study. The results showed that there were abundant genetic variations among the tartary buckwheat germplasm resources. The variation coefficients of different traits were significantly different, with the largest was primary branch of main stem(33.30%), and the smallest was growth days(6.13%). Correlation analysis showed that varying degrees of correlation were existed among the traits of tartary buckwheat, and most of the traits had positively correlated with the yield. The principal component analysis results showed that the accumulation percentage of 89.55% was from the top three principal components. Cluster analysis divided 26 tartary buckwheat germplasm resources into three categories. The comprehensive traits of the groupⅠwas not outstanding, the groupⅡwas high yield strain, the group Ⅲ was dwarf strain.