大蒜种质产量和品质性状主成分聚类分析与综合评价  

Cluster Analysis and Evaluation of Garlic(Allium sativum L.) Germplasm Based on Principal Components

作　　者：陈书霞[1] 周静[1] 申晓青[1] 常燕霞[1] 杜俊娜[1] 孟焕文[1] 程智慧[1] 

机构地区：[1]西北农林科技大学园艺学院/农业部西北地区园艺作物生物学与种质创制重点实验室,陕西杨凌712100

出　　处：《植物遗传资源学报》2012年第3期429-434,共6页Journal of Plant Genetic Resources

基　　金：国家自然科学基金(31071813);西北农林科技大学科技大学唐仲英育种基金(A212020911);西北农林科技大学青年学术骨干支持计划(01140303);国家公益性行业专项(200903018-7)

摘　　要：以40个大蒜品种为供试材料,依据数值分类学的性状选择原则,分别于大蒜生长期和采收后进行农艺性状指标的采集。估算40个大蒜品种16个农艺性状及4个品质指标的主成分,并以前3个主成分和遗传相似性系数为基础,分别作二维散点图和系统聚类分析。40份大蒜品种前7个主成分累计贡献率达85%。根据品种性状主成分表现,评选出性状优良的大蒜品种共10个。在聚类图中,在0.14的遗传相似性水平上可以把40份品种分成4类,即由5份种质组成的类群Ⅰ;由28份种质聚成的类群Ⅱ;由改良蒜等4份种质组成的类群Ⅲ,及苏联蒜等3份种质组成的类群Ⅳ。全部种质的遗传相似性系数在0.07～0.64之间,很好地揭示了品种类群间存在的亲缘关系。The agronomy traits of 40 garlic cultivars were investigated based on the principal of numerical classification,and the PCA（define）of 16 agronomic traits and 5 quality traits were analyzed.The scatter plot were drawn based on the first 3 principal（PC）and the clustering analysis was carried out based on the genetic coefficients.The first 7 PC accounted for 85%of variation among the cultivars.The top 10 cultivars were selected based on the principal component.The 40 cultivars can be classified into 4 groups when SM coefficient was 0.14 on the UPGMA dendrogram.The clustering based on the 0.07~0.64 SM coefficients,which explained the genetic relationship of 40 cultivars.

关 键 词：大蒜 主成分 聚类分析 

分 类 号：S633.4[农业科学—蔬菜学]