利用抗病良种是防治红薯根腐病的重要途径.当前生产上广泛应用的红薯杂交种中,高度抗病且高产高干的较少,在抗病育种研究中,也存有一定的盲目性.鉴于红薯杂交种在生产上利用的实际上是F_1(子一代)的无性后代,所以研究其抗病变异趋势,对克服组合选配和F_1汰留的盲目性,提高育种质量.加快抗病育种进度是很重要的.为此,我们在1980-1981年研究了红薯亲本、F_1及其无性后代对根腐病的抗性,以及F_1的生产力和干率等经济性状. The use of disease-resistant varieties of sweet potato root rot is an important way to prevent the current production of sweet potato hybrids widely used in the highly resistant and high yield dry high, there are some blindness in disease resistance breeding research In view of that sweet potato hybrids are actually asexual progeny of F_1 (subfamilies) in their production, the trend of disease resistance variation is studied to overcome the blindness of combination selection and F_1 elimination and improve the breeding quality. The breeding progress is very important, therefore, we studied the economic traits of root rot such as sweet potato parents, F_1 ​​and its antecedent offspring, and the productivity and dryness of F_1 in 1980-1981.