利用SRAP和SCoT两种分子标记相结合对中国22个番木瓜主要栽培品种(系)进行遗传多样性研究。SCoT标记检测获得的遗传多样性参数值和遗传相似系数范围均高于SRAP标记检测的结果,表明SCoT标记检测多态性的能力高于SRAP标记。基于两种标记数据合并后的UPGMA聚类结果显示,番木瓜种质间的遗传相似系数为0.65~0.90,种质间遗传多样性水平较低;在遗传相似系数为0.82时,将所有参试材料划分为3个类群。应用Mantel检测对SRAP和SCoT及两种标记合并进行相关性分析,表明三者之间具有显著的相关性,且相关性很高。聚类结果从分子水平反映出中国番木瓜主要栽培品种(系)的遗传基础狭窄。 Using SRAP and SCoT markers, the genetic diversity of 22 main cultivars (lines) of papaya in China was studied. The values ​​of genetic diversity and genetic similarity coefficient obtained by SCoT marker detection were higher than the results of SRAP marker detection, indicating that SCoT marker is more capable of detecting polymorphism than SRAP marker. Based on the UPGMA clustering results, the genetic similarity coefficient of Papaya germplasms was 0.65-0.90, and the genetic diversity among the germplasms was low. When the genetic similarity coefficient was 0.82, Materials are divided into three groups. The correlation analysis of SRAP, SCoT and two marker combinations using Mantel test showed that there was a significant correlation between them and the correlation was very high. The clustering results reflect the narrow genetic basis of the main cultivars (lines) of Papaya from the molecular level in China.