贵州甘薯主要农艺性状的遗传效应研究

Genetic Effect of Main Agronomic Characters of Sweet Potato in Guizhou

为提供甘薯育种优良材料,对贵州10个甘薯品种进行了农艺性状的遗传相关和通径分析。结果表明,单株结薯数、单株分枝数、单株绿叶数与产量的相关性极显著;单株结薯数、中薯数、单株绿叶数3个性状对产量形成的直接作用最大,对产量的决定系数总和达0.910 2,可以作为甘薯育种的主要选择性状。

The genetic correlation of main characters of 10 sweet potato varieties was studied by the path analysis to provide good varieties for breeding of sweet potato in Guizhou.The results showed that the potato number per plant,branch number per plant and green leaf number per plant were very significantly correlated to sweet potato yield,the characters of potato number per plant,middle potato number and green leaf number per plant had important direct effect on sweet potato yield and the determination coefficient of three agronomic characters reached 0.9102.Therefore,the characters of potato number per plant,middle potato number and green leaf number per plant should be used as main selection characters in breeding of sweet potato.