利用表型数据构建陆地棉核心种质

以5963份陆地棉种质资源为材料,根据品种主要突变性状和品种类型分组成11组群,在分组的基础上利用21个表型性状,用非加权类平均聚类分析法,构建了281份陆地棉核心种质,占全部种质资源总量的4.71%。利用不同性状的均值t测验、方差F测验、变异系数、多样性指数t检验、均值、极差、表型方差、变异系数、均值差异百分率、方差差异百分率、极差符合率、变异系数变化率、主成分分析等参数进行核心种质代表性检验和评价。结果表明,所构建的陆地棉核心种质可以代表全部种质的遗传多样性。

Construction of Core Collection of Upland Cotton based on Phenotypic Data

Abstract: A total 5963 of germplasm collection of upland cotton accessions were sampled for constructing a core collection. The whole collection was firstly divided into 11 groups based on the main the traits and genotypes. The resultant core collection including 281 accessions was constructed with 21 traits in each subset by unweighted pair-group method with arithmetic means (UPGMA), which accounted for 4.71% of total collection. Furthermore the representativeness between core collection and total collections was assessed by the t test, F test of variance, coefficient of variation, the diversity index t test, average, range, phenotypic variance and variation coefficient, mean difference percentage, variance difference percentage, coincidence rate of range, changeable rate of coefficient of variation and principal component analysis. The results demonstrated that the selected core collection could represent the genetic diversity of initial collection.