早熟禾种质资源形态多样性及主成分分析  

Morphological Diversities of Bluegrass Germplasm Resources and Their Principal Component Analysis

作　　者：吴欣明[1] 王运琦[1] 王赞[2] 郭璞[1] 池惠武[1] 石永红[1] 方志红[1] 刘建宁[1] 

机构地区：[1]山西省农业科学院畜牧兽医研究所,太原030032 [2]中国农业科学院北京畜牧兽医研究所,北京100193

出　　处：《中国农学通报》2017年第3期155-159,共5页Chinese Agricultural Science Bulletin

基　　金：农业部牧草种资源保护项目(13162130135252005);现代农业牧草产业技术体系建设专项(CARS-35-25)

摘　　要：旨在利用形态学指标探讨早熟禾(Poa L.)种质资源遗传多样性,为早熟禾品种改良和选择亲本提供科学依据。研究了不同地理来源的34份早熟禾种质资源的14项形态指标,利用主成分分析和聚类方法,了解其形态多样性。结果表明:不同早熟禾种质的植物形态学特征存在广泛变异,其中以茎秆节数最大,小花数和叶长变异次之,而返青—成熟期生长天数为1.86%,变异最小;主成分分析结果显示叶长、叶宽、草层高、生殖高4个性状是造成早熟禾种质表型差异的主要因素;以14个形态性状为基础的聚类分析将所研究的34份种质材料分为3类,第一类与第三类差别明显。The objective of this research is to explore the genetic diversity of bluegrass germplasm resources by morphological indexes, and provide basis for variety improvement and parent choice. 14 morphological indexes of 34 bluegrass accessions from different geographical origins were studied. The morphological diversities were analyzed by principal component analysis and cluster analysis. The results showed that there were extensive variations in morphological characteristics in different bluegrass accessions. The most significant variance was node numbers of main stem, followed by the number of flowers per head and leaf length, while the growth days of turn green-mature stage had the minimum variance, 1.86%. Principal component analysis showed that leaf length, leaf width, height of plant and height of fertile tillers were the main factors which produced morphological variation of 34 wild bluegrass accessions. Based on the 14 morphological indexes, cluster analysis showed that all 34 accessions of bluegrass were divided into 3 groups, the first group and the third group had obvious differences.

关 键 词：早熟禾 种质资源 形态多样性 主成分分析 

分 类 号：S324[农业科学—作物遗传育种]