低酚棉品种资源聚类分析及核心品种抽取方法的探讨  

Cluster Analysis And Sampling Methods for Core Collection Construction in Glandless Cotton

作　　者：张桂寅[1] 王省芬[1] 刘素娟[1] 马峙英[1] 

机构地区：[1]河北农业大学棉花研究所河北省作物种质资源重点实验室,保定071001

出　　处：《棉花学报》2004年第1期8-12,共5页Cotton Science

基　　金：河北省自然科学基金重点项目(301167)。

摘　　要：对我国低酚棉品种资源进行了聚类分析并探讨了核心品种的抽取方法。以116份低酚棉品种为材料,通过16个性状的分析,采用离差平方和法进行聚类,根据树状图,将该低酚棉群体分为5个类群,对各类群品种性状进行了分析。根据取样比例,将该群体分为20个类群,在各类群内,采用随机抽样、按样品间最小遗传距离和最大遗传距离抽样三种方法,构建了3个低酚棉核心种质库,并加以比较。结果显示最大遗传距离法构建的核心种质库,能最大限度地保存原群体的遗传多样性。Cluster analysis and comparison were made based upon sixteen characters of 116 Shares of glandless cotton from China. The 116 germplams were classified into five groups at Euclidean distance 15.1 based on the hierardical cluster analysis with Ward's method. There were 30 varieties in groupⅠ. weight of boll, seed index and fiber strength were less than these of other groups. In the groupⅡ,21 varieties belonged to this group, bolls per plant and lint yield were more than that of the other groups. The fiber quality traits and Verticillium wilt resistance were less than those of other groups. There were better characters on weight of boll, seed index and Verticillium wilt resistance, but fiber quality was poor in the groupⅢ. In groupⅣ, weight of boll was the highest and fiber strength was the best in the five groups. The lint yield and bolls per plant value of group, core collections were constructed using sampling group Ⅴ were the lowest. According to sampling ratio, these varieties were divided into 20 groups. Within each methods of random, minimum distance and maximum distance, respectively, the maximum-distance-sampling was effective to maintain the genetic diversity of the original population.

关 键 词：低酚棉 品种资源 聚类分析 抽取方法 核心种质库 

分 类 号：S562[农业科学—作物学]