茎瘤芥种质的表型遗传多样性分析

以133个茎瘤芥种质为材料,通过田间试验,基于表型性状分析茎瘤芥种质的遗传多样性。结果表明,除裂叶对数、沟间深度、茎叶比、侧瘤宽度、瘤茎鲜质量性状外,其余16个经济性状在茎瘤芥材料间的变异系数变幅较小;茎瘤芥材料间的遗传距离变幅为0.01～7.77,平均为2.50,有88.93%的遗传距离小于4.00。表明参试材料间表型相似程度较高,遗传差异较小,遗传基础相对狭窄。表型聚类分析结果表明,当遗传距离为0.21时,可将供试材料分成8类,且每个类群都有各自的性状特点,说明利用表型性状可以将茎瘤芥种质进行分类和鉴定。

Analysis of Genetic Diversity of Tuber Mustard Germplasms Based on Its Phenotypes

Using a field experiment and 133 tuber mustard germplasms as materials,the genetic diversity on the basis of their phenotypes was investigated.The results showed that the variation coefficients of the sixteen phenotypic characters changed in a small range excluding the number of bilobed leaf,depth of inter-nodule,and stem weight per plant.The genetic distances among the 133 tuber mustard germplasms ranged from 0.01 to 7.77,with an average of 2.50,of which 88.93% were less than 4.00.The results indicated that the similarity level was high and the genetic diversity was absent among the 133 tuber mustard germplasms.The cluster analysis indicated that the materials studied could be separated into 8 groups,showing that tuber mustard germplasms could be classified and identified based on phenotypes.