多花黑麦草(Lolium multiflorum Lam.)是世界栽培牧草中的优良禾本科牧草。为更好地利用多花黑麦草种质资源,本研究对引自国外的15份多花黑麦草种质的15个形态性状和农艺性状进行了变异系数、相关性分析、主成分分析和聚类分析。结果表明:15份材料间存在较大变异,除单株干重外,其余性状在供试材料间均表现出显著性差异,变异系数范围为10.28%~39.15%,变异系数平均值为19.49%,从小到大依次为小穗数<小穗长<株高<分蘖数<千粒重<花序长<倒二叶长<小花数<茎粗<第一节间长<倒二叶宽<旗叶宽<旗叶长<单株干重<单株鲜重。主成分结果表明,前5个主成分累积贡献率达到84.51%,第1主成分以株高为主要特征;第2主成分以旗叶和倒二叶长、宽为主要特征;第3主成分以花序长和小花数为主要特征;第4主成分以千粒重为主要特征;第5主成分以产草量为主要特征。15份种质材料经基于欧氏距离的UPGMA聚类分析被划分为3大类,类别间存在较显著的差异,其中第2类因其植株高大、叶片宽大的特点,具备选育高产种质的潜力。 Lolium multiflorum Lam. Is an excellent gramineous pasture among cultivated forages in the world. In order to make better use of the ryegrass germplasm resources, this study conducted 15 varieties of ryegrass introduced from abroad 15 morphological and agronomic traits coefficient of variation, correlation analysis, principal component analysis and poly Class analysis The results showed that there were significant variations among 15 materials except the dry weight per plant, with significant differences among the tested materials with the coefficient of variation ranged from 10.28% to 39.15% and the average coefficient of variation was 19.49% , From small to large, followed by the number of spikelets