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甘薯是一种异花授粉性能强的作物,不仅自交不亲和,同时杂交的亲和性也有一定的限制范围。甘薯品种存在着若干个杂交不亲和群。一般来说,异群品种间杂交亲和性强,杂交结实率较高;而同群品种间杂交亲和性差,杂交结实率很低,甚至不能结实。关于甘薯品种杂交不亲和群的研究,近半个世纪以来国内外进行了不少的研究工作。至今国外已分出A—P群16个杂交不亲和群。在国内我们目前初步找出7个杂交不亲和群,其中6个杂交不亲和群,1个属多释性半亲和群。
Sweet potato is a cross-pollination performance of crops, not only self-incompatibility, while the compatibility of hybrids also have some limits. Sweet potato varieties there are several hybrid incompatibility groups. In general, cross-species hybrids have strong affinity and high seed-setting rate, while the cross-species compatibility of the same group is poor, and the rate of cross-fertilization is very low or even not strong. About sweet potato varieties hybrid incompatible research, nearly half a century since done a lot of research work at home and abroad. To date, 16 cross-incompatible groups of A-P have been separated from other countries. In our country, we initially identify seven hybrid incompatibility groups, of which six hybrid incompatibility groups, one is a multi-release semi-affinity group.