甘蔗近缘种滇蔗茅(Erianthus rockii)表型性状遗传多样性研究

选用6个数量性状和23个质量性状对滇蔗茅野生资源的表型变异、多样性及聚类关系进行分析。结果表明,数量性状变异系数在12.72%~22.38%之间,最大的是田间锤度,为22.38%,其次是茎径,为22.27%,最小的是叶长,为12.72%;质量性状的曝光后节间颜色多样性丰富,茎形、芽形、生长裂缝、节间形状、花序形状等5个性状均表现一致;聚类分析表明51份滇蔗茅无性系材料可分为4大类群和5个亚类群。遗传多样性和聚类分析为资源杂交利用和优异基因挖掘提供参考。

Genetic Diversity Analysis of Phenotypic Traits in Erianthus rockii Wild Species

B Based on 6 quantitative traits and 23 qualitative traits, the phenotypic variation, genetic diversity, and cluster relationships were investigated in Erianthus rockii wild species. The results showed that the variation coefficient of the 6 quantitative traits ranged from 12.72%~22.38% among the 51 materials, brix trait had the greatest coefficient variation of 22.38%, stalk diameter as the next of 22.27%, and lamina length was the smallest of 12.72%.Furthermore,the genetic diversity was abundant in internode colour exposed, however, stalk shape, bud shape, internode shape, growth crack, inflorescence shape did not segregate. Moreover, the cluster analysis indicated these progenies could be divided into 4 groups and 5 subgroups. Genetic diversity and cluster analysis would be helpful to utilization of the materials in breeding and gene discovery.