A comparison of genetic variation among wild and cultivated Morus Species (Moraceae : Morus) as revealed by ISSR and SSR markers

文献类型： 外文期刊

第一作者： Zhao Weiguo

作者： Zhao Weiguo;Zhou Zhihua;Miao Xuexia;Zhang Yong;Wang Sibao;Huang Jianhua;Xiang Hui;Pan Yile;Huang Yongping

作者机构：

关键词： DNA polymorphism;genetic diversity;ISSR;Morus L;SSRs

期刊名称：BIODIVERSITY AND CONSERVATION （ 影响因子：3.549； 五年影响因子：3.915 ）

ISSN： 0960-3115

年卷期： 2007 年 16 卷 2 期

页码：

收录情况： SCI

摘要： In this study, inter-simple sequence repeats (ISSR) ans simple sequence repeat (SSR) markers were used to investigate genetic diversity of 27 mulberry accessions including 19 cultivated accessions (six M. multicaulis, three M. alba, two M. atropurpurea, two M. bombycis, one M. australis, two M. rotundiloba, one M. alba var. pendula, one M. alba var. macrophylla, and one M. alba var. venose) and 8 wild accessions (two M. cathayana, two M. laevigata, two M. wittiorum, one M. nigra and one M. mongolica). ISSRs and SSRs were compared in terms of their informativeness and efficiency in a study of genetic diversity and relationships among 27 mulberry genotypes. SSRs presented a higher level of polymorphism and greater information content. All index values of genetic diversity both markers analyzed using Popgene 32 software indicated that within wild species had higher genetic diversity than within cultivated species. Cultivation may caused the lose of genetic diversity of mulberry compared with wild species revealed by ISSR and SSR markers. The mean genetic similarity coefficients among all mulberry genotypes ascribed by ISSR and SSR matrices were 0.7677 and 0.6131, respectively. For all markers a high similarity in dendrogram topologies was obtained although some differences were observed. Cluster analysis of ISSR and SSR using UPGMA method revealed that the wild species are genetically distant from the domesticated species studied here. The correlation coefficients of similarity were statistically significant for both marker systems used. Principal coordinates analysis (PCA) for ISSR and SSR data also supports their UPGMA clustering. These results have an important implication for mulberry germplasm characterization, improvement, molecular systematics and conservation.

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