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为了给淀粉型甘薯新品种的选育工作提供依据,采用灰色关联分析法探讨了甘薯的9个农艺性状与其淀粉产量之间的关联度。结果表明:甘薯主要性状与淀粉产量之间的关联度依次为:鲜薯产量>干物率>出粉率>单株分枝>单株结薯数>中薯率>单株蔓重>最长蔓长>大薯率。与淀粉产量最为密切的相关性状是鲜薯产量,关联度为0.9229,其次是干物率,关联度为0.9060,大薯率影响较小。因此,在选育高淀粉甘薯新品种时,应该多选择鲜薯产量高、干物率高、出粉率高、分枝数较多以及中等薯块数量较多的品种。
In order to provide a basis for the breeding of new starchy sweet potato varieties, the gray relational analysis method was used to explore the correlation between nine agronomic characters and starch yield of sweet potato. The results showed that the correlations between the main characters of sweet potato and starch yield were as follows: yield of fresh potato> dry matter rate> output of powder> single branch> single tuber> average tuberous rate> Man grow> big potato rate. The most relevant trait related to starch yield was the yield of fresh potato, the correlation degree was 0.9229, followed by the dry matter rate, the correlation degree was 0.9060, and the effect of big potato was little. Therefore, in the selection of high-starch sweet potato varieties, should choose more fresh potatoes, high dry matter rate, high rate of flour, more branches and a larger number of medium-sized potato varieties.