甘薯实生系(F_1)是分离世代,其性状变异与资源品种表现同一趋势,与其无性系在诸多性状上持有显著的正相关关系,是对实生系进行早期选择利用的基础。实生系的种子根可以形成独头块根,结薯性分为成薯、膨大、直根三类,成薯系百分比受亲本影响因组合而异,在一定条件下受环境的影响不明显。经五年专题 Sweet potato (F_1) was isolated from generation to generation, and its variation of characters showed the same tendency with that of resource varieties. It had a significant positive correlation with its clones in many traits, which was the basis for early selection and utilization of its parents. The root system of the seedling could form single root tuber. The tuberous tuberous tuberous root was divided into three types: potato, dilated and straight root. The percentage of the potato producing line affected by the parents varied depending on the combination, and was not affected by the environment under certain conditions. After five years of special topic