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番薯是无性繁殖作物,来自同一个单株的无性繁殖后代遗传基础相同,生长一致,不存在分离现象,也不存在天然杂交而引起退化。但
Sweet potatoes are vegetatively propagated. The cloned offspring from the same plant have the same genetic basis, consistent growth, no segregation and no natural hybridization. but