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试验通过杂交与植物生长调节剂处理、以及植物生长调节剂处理结合胚珠培养，克服甘薯组Ａ系列与Ｂ系列种间的杂交不亲和性，研究结果表明：前一种做法有克服杂交不亲和性的作用，但获得种子的机率低，而且即使获得种子，也大部份不发芽，或发芽后生长异常，中途夭亡；后一种做法则效果明显。①植物生长调节剂２，４－Ｄ处理甘薯组Ａ系列Ｂ系列种间杂交组合，须与胚珠培养相结合，才能获得Ａ系列与Ｂ系列种间杂支种植株。②在不亲和种间杂交组合Ｉ．ｔｒｉｌｏｂａ（２ｎ＝２ｘ＝３０）ｘＩ．ｔｒｉｆｉｄａ（２ｎ＝４ｘ＝６０）中成功获得杂种植株４棵，细胞学鉴定结果杂种体细胞染色体数２ｎ＝４５，证明为种间杂种，种间杂种Ｈ１、Ｈ２和Ｈ３移栽温室成活。生长繁茂，并都现蕾开花。花器中均不具雄蕊，而有多雌盔现象。因此本研究结果进一步证明了植物生长调节剂处理与胚珠培养相结合是克服种间杂交不亲和性和挽救杂种夭亡的有效途径。另外也发现甘薯组Ａ、Ｂ系列的种间杂交，非常符合其它作物远缘杂交规律，既在受精前存在一系列困难，也在受精成功后存在一系列困难。
In the experiment, cross hybridization and plant growth regulator treatment and plant growth regulator treatment combined with ovule culture were used to overcome the hybridization incompatibility between A series and B series in sweet potato group. The results showed that: And the role of sex, but access to seeds is low, and even if access to seeds, most of them do not germinate, or abnormal growth after germination, died in the middle; the latter approach is obvious effect. ① Plant growth regulators 2,4-D treatment Sweetpotato group A series B series interspecific hybrid combinations, to be combined with ovule culture in order to obtain A series and B series interspecific hybrid plants. ② hybrids between incompatible species I. triloba (2n = 2x = 30) xI. trifida (2n = 4x = 60), 4 hybrid plants were successfully obtained. Cytological identification showed that chromosome number 2n = 45 of the somatic hybrids proved to be inter-interspecific hybrids, interspecific hybrids H1, H2 and H3 transplanting greenhouse survival. Lush growth and budding flowering. Flowers are not stamens, but more female helmets phenomenon. Therefore, the results of this study further prove that the combination of plant growth regulator and ovule culture is an effective way to overcome the cross incompatibility and save the hybrid prey. Also found that sweet potato group A, B series of interspecific hybridization, is very consistent with other crops distant hybridization rules, both before the fertilization there are a series of difficulties, but also after the success of fertilization there are a series of difficulties.