Factor and cluster analysis of quantitative characters in Bombyx mori germplasm resources
Using factor analysis and variety clustering methods to comprehensively evaluate Bombyx mori germplasm resources can improve the efficiency of variety identification and facilitate the rational and effective selection of breeding parents,providing important references for breeding work.With 60 Bombyx mori germplasm resources as the tested materials,their main quantitative traits were subjected to factor analysis,and cluster analysis was conducted based on their Euclidean distance.The cumulative contribution rate of the first 5 common factors of the quantitative traits of the tested Bombyx mori germplasm resources reached 92.754 5%,among which the cocoon silk yield composition factor was the first common factor with a maximum contribution rate of 45.954 8%;the vitality composition factor was the second common factor with a contribution rate of 18.703 3%;the third common factor was the reelability factor with a contribution rate of 12.561 2%;the fourth and fifth common factors were the hatching rate factor and the cocoon filament size factor with contribution rates of 9.795 6%and 5.739 6%,respectively.In the Euclidean distance clustering diagram,the 60 germplasm resources can be divided into three main groups,namely,a high-quality and high-yielding group composed of 28 germplasm resources,a general group composed of 19 germplasm resources,and a special trait genetic material group composed of 13 germplasm resources.The first and second common factors,cocoon silk yield and vitality,are two main indicators in Bombyx mori breeding,and selection and improvement are made based on a few common factors and special factors in each generation breeding process to improve breeding efficiency.Cluster analysis can reveal the relative genetic distance between different Bombyx mori germplasm resources,and provide a scientific and objective basis for the hybrid breeding,utilization and improvement of Bombyx mori germplasm resources.
万方数据
维普
