中细纤度家蚕品种数量性状主成分分析

采用多元统计分析方法,对15个家蚕品种的7个主要经济性状进行主成分分析。结果表明:7个数量性状可简化为产量因子、效率因子、纤度因子3个主成分,所提供的信息量占7个数量性状信息量的85.70%。在主成分分析的基础上,对15个品种的3个主成分值进行聚类分析后划分为4大类群:产量因子的整体趋势是第1类群>第2类群>第4类群>第3类群;效率因子是第3类群>第1类群>第4类群>第2类群;纤度因子是第3类群>第2类群>第1类群>第4类群。基于选择中细纤度蚕品种育种亲本的指标,推测第1类群(苏17、761、SC3、春萌、794)和第2类群(镇12、895春珠肥、854A、898、SJ3)是亲本选择、选配的优先选择材料。

Principal Component Analysis of Quantitative Traits of Middle-fine Size Filament Strain, Bombyx mori

Seven characters of cocoon filament from 15 strains of Bombyx mori were used in this study for principal component analysis.Following principal component analysis for 7 quantitative traits of Bombyx mori,3 principal elements,that is,yield element,efficiency element and size element,were obtained,which provided 85.70% cumulative variance.Based on these 7 traits,15 strains of Bombyx mori were grouped into 4 clusters.Comparison results of 3 principal elements showed that the whole trend for yield element is Cluster 1> Cluster 2>Cluster 4>Cluster 3,for efficiency element is Cluster 3> Cluster 1> Cluster 4> Cluster 2,and for size element is Cluster 3>Cluster 2>Cluster 1>Cluster 4.These results suggested that Cluster 1 and Cluster 2 are the suitable ones for parent selection and copulation to breed middle-fine size filament silkworm strain.