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甘薯(Ipomoea batatas(L.)Lam.)作为世界上一种重要的粮食、饲料、工业原料及新型能源作物,从有性生殖F1选择优良实生系进行选择育种一直是甘薯育种的重要方式。为了优化甘薯杂交育种方法,合理选配杂交组合,提高育种效率,本试验利用SSR标记研究了甘薯杂交群体基于SSR标记及13个农艺性状的遗传多样性,得到了群体内的聚类图,并且筛选出了甘薯的高产株系。群体SSR标记的聚类分析结果显示,群体材料与各亲本遗传距离比较远,被聚为3类,而亲本单独聚在另外一类。13个农艺性状的聚类将亲本与部分群体材料聚在了一起,且将群体材料和亲本材料作为一个整体时,其遗传距离的变异高达30%以上,远远高于SSR标记所获得的遗传变异系数。
As an important food, feed, industrial raw material and new energy crop in the world, Ipomoea batatas (L.) Lam. Has been an important way of breeding sweet potato for its selective breeding from selection of fine reproductive lines of sexual reproduction F1. In order to optimize sweet potato hybrid breeding methods and rational selection of hybrid combinations to improve breeding efficiency, SSR markers were used to study the genetic diversity of sweet potato hybrids based on SSR markers and 13 agronomic traits. High-yielding sweet potato lines were screened. Cluster analysis of population SSR markers showed that the genetic material of the population was far away from the parents, clustered into three groups and the parents clustered separately. The cluster of 13 agronomic traits clustered the parents with some population materials, and when the population materials and parent materials were taken as a whole, the variation of genetic distance was as high as 30%, much higher than that obtained from SSR markers Coefficient of variation.