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通过１０个随机引物的ＤＮＡ扩增，首次报道了２２个甘薯品种（系）的ＲＡＰＤ多态性。不同品种具有不同的ＤＮＡ扩增带型，反映了不同品种遗传背景上的差异；计算了２２个甘薯品种（系）的Ｎｅｉ＇ｓ相似系数与遗传距离，建立了它们的ＵＰＧＭＡ系统树，并通过聚类分析与对应分析，讨论了２２个甘薯品种（系）间的亲缘关系，ＲＡＰＤ多态性分析从分子水平上反映出了甘薯品种（系）复杂的遗传背景，并为育种的亲本选配提供了依据
The RAPD polymorphism of 22 sweet potato varieties (lines) was first reported by DNA amplification of 10 random primers. Different breeds have different DNA amplification bands, which reflect the genetic background differences of different breeds. Nei’s similarity coefficient and genetic distance of 22 sweet potato varieties (lines) were calculated, and their UPGMA phylogenetic trees were established and passed Cluster analysis and correspondence analysis, the genetic relationship among 22 sweetpotato cultivars (lines) was discussed. The RAPD polymorphism analysis showed the complex genetic background of sweet potato varieties (lines) at the molecular level, Provided the basis