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甘薯(Ipomoea batatas)为Ipomoea属的Batatas组。此组有11个野生种,但均不产生可食用块根,其中的I.trifida是唯一能和甘薯杂交并产生可育后代的野生种,因而在甘薯的进化和育种上可能起重要作用。它被公认为栽培甘薯的近缘祖先。Batatas组所有种的染色体数目都为15的倍数,甘薯为六倍体
Ipomoea batatas is the Batatas group of the genus Ipomoea. This group has 11 wild species, but none of them produce edible roots. Among them, I.trifida is the only wild species that can cross with sweet potato and produce fertile offspring, which may play an important role in the evolution and breeding of sweet potato. It is recognized as the ancestor of cultivated sweet potato. The number of chromosomes in all Batatas species is a multiple of 15 and the sweet potato is hexaploid