高淀粉甘薯亲本的配合力分析

Combining Ability Analysis of High Starch Sweetpotato Parents

通过5个高淀粉亲本的不完全双列杂交试验,对亲本的7个性状进行配合力分析和遗传力分析,结果表明:BB30 224属理想的高产高干亲本;8410 788属高产中干亲本;绵粉一号属高干中产亲本。BB30 224×川薯34、豫薯七号×川薯34、绵粉一号×BB30 224、绵粉一号×豫薯七号、8410 788×豫薯七号5个组合符合高淀粉育种的目的。广义遗传力以烘干率、绿叶数和蔓长较高,而鲜薯重、大中薯重和薯干重的广义遗传力较低。

Combining ability and heritability analysis was conducted using incomplete diallel cross to 5 high starch yield sweet potato parents. The results indicated that, out of the 5 parents, BB30-224 was a high yield and high dry matter content parent, 8410-788 was a high yield and middle-dry matter content parent, Mianfen 1 was a high dry matter and middle-yield parent. Among the 10 combinations,BB30-224×Chuanshu34、Yushu 7×Chuanshu34, Mianfen 1×BB30-224, Mianfen 1×Yushu7 and 8410-788×Yushu7 were high starch yield combinations. The heritability of dry matter content, number of green leaves and length of vine was higher, weight of fresh tuber, weight of marketable tuber and weight of dry tuber have lower heritability.