葱种质资源数量性状的聚类分析、相关性和主成分分析

Clustering,correlation and principal component analyses in welsh onion(Allium fistulosum L.) germplasm resources

为阐明普通大葱和分葱种质资源的亲缘关系以及数量性状间的关联性,在大田栽培条件下以国内外116份葱资源为试验材料进行了数量性状的聚类分析、相关性和主成分分析。结果表明：116份葱种质的12个数量性状遗传变异系数为25.25%~146.38%,基于形态标记划分的5个组群间形态差异明显。单株重与假茎重、叶长、株高、出叶孔间距、叶扁宽和假茎长相关性均达极显著或显著水平。单株重、株高、假茎重3个主成分累积方差贡献率为91.18%,其反映的信息与基于12个数量性状的聚类和相关分析结果基本一致。

To elucidate the relations between welsh onion（Allium fistulosum L.） germplasm resources and the correlations between quantity characters,clustering,correlation and principal component analyses were conducted with 116 A.fistulosum accessions in the fields.Information of the three principal components corresponded to the tree plot of clustering and correlation analyses based on 12 quantity characters.The result showed that coefficients of variation of the 12 quantity characters among 116 A.fistulosum accessions varied from 25.25%-146.38%.All accessions were clustered into five groups,and significant differences of morphological characters between five groups were identified.Psudostem weight,leaf length,plant height,distance of the adjacent leaves,leaf width and psudostem length were correlated to the yields of plants positively.Accumulative variance contribution rate of single plant weight,plant height and psudostem weight was 91.18%.