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对产自内蒙古不同分布区12份扁蓿豆种质资源的12个形态性状进行主成分和聚类分析。结果表明,12个形态性状在材料间都表现显著差异,扁蓿豆种质资源遗传变异丰富;通过多变量的主成分分析,前6个主成分代表了扁蓿豆形态多样性的85.72%,株高、叶面积、叶长、株丛直径、枝条长和千粒重等6个性状是造成扁蓿豆表型差异的主要因素;基于形态性状的聚类分析把12份材料聚为4类,其中第4类MR-12扁蓿豆资源的株高、枝条长和株丛直径明显高于其他类,叶片大且叶量丰富,营养性状表现良好;结实性状中荚果长和千粒重较大,综合性状表现较好,可以作为引种驯化和育种的试验材料。
12 morphological traits of alfalfa germplasm from 12 different geographical distribution areas in Inner Mongolia were analyzed by principal component analysis and cluster analysis. The results showed that the 12 morphological traits showed significant differences among the materials, and the genetic variation of Medicago lupulus accessions was rich. According to the multivariate principal component analysis, the first 6 principal components represented 85.72% of the morphological diversity of Medicago ruthenica, Six traits, such as plant height, leaf area, leaf length, plant cluster diameter, shoot length and 1000-grain weight, were the main factors contributing to the phenotypic differences of Medicago. The cluster analysis based on morphological traits clustered 12 materials into four types The plant height, length of branch and cluster of MR-12 Medicago sativa L. resources in category 4 were significantly higher than those in other categories. Leaf size was large and abundant in leaf shape. Nutrient traits were well-behaved in pods; the pod length and 1000- Better performance, can be used as the introduction of domesticated and breeding test materials.