大葱种质资源多样性分析

以98 份大葱种质资源为供试材料，对其16 个表型性状进行多样性分析和聚类分析。结果表明，大葱种质的遗传多样性丰富，多样性指数最高的数量性状和质量性状分别为株高和叶节紧密度，变异系数最大的为单株质量。聚类分析可将大葱种质分为4 个类群，类群Ⅰ的种质多为“矮细”类型的直筒状葱，类群Ⅱ的种质表现为假茎短的鸡腿状葱，类群Ⅲ的种质主要为植株“高细”、假茎较疏松、出叶孔间距大的直筒状葱，类群Ⅳ的种质主要为“高粗”类型、蜡粉多、叶数多的直筒状葱。

Genetic Diversity Analysis of Welsh Onion Germplasm Resources

Taking 98 accessions of welsh onion as test material，this paper analyzed their diversities in 16 phenotypic traits．The results indicated that the genetic diversity of welsh onion germplasm resources were rich．The quantity traits and quality traits of those with the highest diversity index were the tightness between plant height and leaf node，respectively．Those with the biggest variable coefficient were single plant weight．The paper also conducted clustering analysis on welsh onion germplasm and divided them into 4 groups．The germplasm of group I were mostly‘drawf and thin’straight type onion．The germplasm of groupⅡwere chicken leg type with short cauloid．The germplasm of group Ⅲ were mainly of‘tall and thin’straight type onion with loosen and bigger space between leaf holes．The germplasm of group Ⅳ were mainly of‘tall and thick’straight type with many wax powder and leaves．