一般旋花科植物及其甘薯属有许多原始种均是自交不亲和,甘薯种(Ipomoea batatas Lam.)一般也有自交不亲和的特性,即使品种间杂交,也存在若干个不亲和群.同群品种杂交,亲和性差,结实率低,而异群品种杂交,亲和性强,结实率高.因此, Ordinary Convolvulaceae and its Ipomoea Many of the original species are self-incompatible, sweet potato species (Ipomoea batatas Lam.) Are generally self-incompatibility, even if the inter-species hybrids, there are a number of non-pro And the group. The same group of hybrids, poor affinity, low seed set, and heterogeneous hybrids, affinity, seed setting rate.Therefore,