以无性繁殖为主的甘薯培育自交系,利用杂种优势育种,也引起了国内外育种家的重视。我国有关科研单位和农业院校,自五十年代初期开始,先后开展了此项研究工作,并掌握了一批自交结实率较高的品种(系)和一些早代自交材料,选出了一些优良自交系,同时在自交结实率和亲本开花习性等方面做了不少研究。日本有关单位,从1950年开始研究了自交亲合性、开花习性、结实率、自交系与其他品种的配合力,以及自交后代的亲合性等。1972年九洲农试站观测了593个品种的 The asexual propagation of sweet potato breeding inbred lines, the use of heterosis breeding, also attracted the attention of breeders at home and abroad. Since the beginning of the 1950s, relevant research institutes and agricultural institutions in our country have successively carried out this research work and have mastered a number of varieties (lines) with high self- Some good inbred lines, at the same time in the selfing seed set rate and parental flowering habit done a lot of research. Relevant Japanese units began to study self-compatibility, flowering habits, seed setting rate, combining ability of inbred lines with other varieties, self-descendants affinity and so on since 1950. Jiuzhou agricultural test station in 1972 observed 593 varieties