无芒雀麦种质资源农艺性状遗传多样性分析及综合评价

Genetic Diversity Analysis and Comprehensive Evaluation of Agronomic Traits in Bromus inermis Germplasm Resources

以93份无芒雀麦种质资源为试验材料,通过对10个产量性状进行遗传多样性分析及综合评价,探讨不同种质材料之间的遗传变异水平。结果表明,茎重的变异系数和遗传多样性指数均最大,分别为30.890%和2.197,叶重的变异系数最小(7.908%),穗长的遗传多样性指数最小(1.970);相关性分析发现,鲜草产量和干草产量分别与株高、茎粗、茎重和叶重呈显著或极显著正相关;聚类分析将93份种质材料聚为9大类群,其中第3类群的鲜草产量、干草产量和叶重表现出最大;第5类群的茎重和节数表现出最大;第6类群的株高表现出最大;第7类群的穗长、茎粗和叶宽表现出最大;第8类群的叶长表现出最大;主成分分析显示,种质74、87、22、86、69、2、77、53、72、8得分较高,可作为育种的优良亲本材料。

In this paper,the genetic diversity of 10 yield-related traits in 93 Bromus inermis germplasms was analyzed and the genetic variation among different germplasms was also evaluated.The results showed that the variation coefficient and genetic diversity index of stem weight were the highest,being 30.890%and 2.197 respectively,while the variation coefficient of leaf weight and the genetic diversity index of spike length were the lowest,being 7.908%and 1.970,respectively.Correlation analysis showed that fresh grass yield and hay yield were significantly positively correlated with plant height,stem diameter,stem weight and leaf weight,respectively.Further,the 93 B.inermis germplasms were grouped into nine groups,and the group 3 showed the highest fresh grass yield,hay yield and leaf weight based on cluster analysis.Additionally,the stem weight and node number of group 5 and the plant height of the group 6 were the largest,while group 7 and group 8 showed the largest spike length and the largest leaf length respectively.Principal component analysis showed that germplasm 74,87,22,86,69,2,77,53,72,8 had high scores and could be used as excellent parent materials for breeding.In this paper,the genetic diversity of 10 yield-related traits in 93 Bromus inermis germplasms was analyzed and the genetic variation among different germplasms was also evaluated.The results showed that the variation coefficient and genetic diversity index of stem weight were the highest,being 30.890%and 2.197 respectively,while the variation coefficient of leaf weight and the genetic diversity index of spike length were the lowest,being 7.908%and 1.970,respectively.Correlation analysis showed that fresh grass yield and hay yield were significantly positively correlated with plant height,stem diameter,stem weight and leaf weight,respectively.Further,the 93 B.inermis germplasms were grouped into nine groups,and the group 3 showed the highest fresh grass yield,hay yield and leaf weight based on cluster analysis.Additionally,the stem weight and node number of group 5 and the plant height of the group 6 were the largest,while group 7 and group 8 showed the largest spike length and the largest leaf length respectively.Principal component analysis showed that germplasm 74,87,22,86,69,2,77,53,72,8 had high scores and could be used as excellent parent materials for breeding.