灰楸形态多样性分析及核心种质初步构建  

Morphological Diversity Analysis and Preliminary Construction of Core Collection of Catalpa fargesii Bureau

作　　者：李秀兰[1,2] 贾继文[2] 王军辉[2] 麻文俊[2] 马建伟 赵秋玲 

机构地区：[1]三峡大学化学与生命科学学院,湖北宜昌443002 [2]中国林业科学研究院林业研究所/林木遗传育种国家重点实验室/国家林业局林木培育重点实验室,北京100091 [3]甘肃省小陇山林业科学研究所,天水741022

出　　处：《植物遗传资源学报》2013年第2期243-248,共6页Journal of Plant Genetic Resources

基　　金：国家"十二五"科技支撑计划课题(2012BAD21B03);农业成果转化资金项目(2008GB24320414)

摘　　要：根据对267个灰楸的15个相关性状的方差和主成分等统计分析结果,评价灰楸种质资源的形态多样性。并且将种质资源按地理流域进行分组,以欧氏距离结合离差平方和的方法进行系统聚类,以生产或育种过程中起过重要作用的品种为必选材料,初步构建了63份核心种质,占总种质的23.6%。63份核心种质和总种质遗传多样性t检验未达到显著水平,表明初步构建的灰楸核心种质能代表总体资源的遗传多样性。Using 267 accessions of Catalpa fargesii Bur. as test materials, 15 morphological traits were carried out, then principal components and cluster analysis were performed. The results were used to evaluate the morpho- logical diversity of Catalpa fargesii Bur. germplasm resource. Moreover, basing on geographical distribution and phenotypic data, sum of squares method,and Euclidean distance were used to perform hierarchical cluster. Varie- ties or lines having made great contribution in the breeding and production are priority entries in sampling and 63 accessions of core collection were constructed preliminarily, accounting for 23.6% of the total 267 accessions. The results showed that genetic diversity of the 63 core collections had no significant difference with total accessions, which meaned that the 63 core collections of Catalpa fargesii Bur. could represent the genetic diversity of the total. This lays foundation for study, effective use,and conservation of Catalpa fargesii Bur. to some extent.

关 键 词：灰楸 核心种质 形态多样性 主成分分析 聚类分析 

分 类 号：S792[农业科学—林木遗传育种]