燕麦种质资源农艺性状遗传多样性的鉴定评价

为了解燕麦(A vena sativ a L.)种质资源在江淮地区农艺性状上的差异,本试验对141份燕麦种质资源的14个主要农艺性状进行遗传多样性分析、主成分分析以及聚类分析.结果表明:供试燕麦种质的遗传多样性指数较高,多样性指数最高的为单株鲜重,其次为单株干重和千粒重,分别为2.64,2.48,2.33;供试燕麦种质...

Identification and Evaluation of Genetic Diversity of Agronomic Traits in Oat Germplasm Resources

Genetic diversity analysis,principal component and cluster analysis were performed on 141 accessions of hulled and naked oat to investigate genetic diversity of agronomic character in Jianghuai areas. The results showed that the genetic diversity index of all traits were relatively large. Fresh weight of plant had the highest genetic diversity index,followed by dry weight of plant and thousand grain weight,which were 2.64,2.48 and 2.33,respectively;The coefficient of variation of thousand grain weight and number of spikelet were 29.46% and 24.47% respectively. According to genetic difference of each characteristic among varieties,the 141 accessions could be classified into 3 categories by cluster analysis. The first group could be used as parents of specific plant height and spikelet objectives,the second group could be used as parents of high-yield breeding objectives,the third group could be used as parents of seed yield objectives. The principal component analysis on quantitative characters showed that the accumulative contribution rate of the first four principal components accounted for 69.609% of the total variation,the first principal component mainly reflected the yield,while the second principal component reflected the morphological characters. The third and fourth principal component reflected characteristics of seed and seed yield,respectively.