[Objective]This study was to reveal the genetic diversity and genetic relationship of the kenaf(Hibiscus cannabinus L.) resources from different origins, thus providing basis for genetic improvement and molecular marker-assisted breeding of kenaf. [Method]Ninety one ISSR molecular markers were used for amplification on 44 shares of kenaf germplasm resources, of which 21 that showed good diversity and clear bands were chosen for PCR amplification. Based on amplification results, the genetic similarity coefficients among kenaf germplasm resources were calculated by using analytic software NTSYSpc-2.10e, and phylogenetic tree was then established via UPGMA. [Result]Totally 169 bands were amplified using the 21 screened primers, averagely 8.05 bands were amplified from each primer. Of them, 141 bands were polymorphic, accounting for 83.4%. When genetic similarity coefficient 0.887 was used as criterion L1, these 44 shares of kenaf germplasm could be classified to be 32 shares of cultivars and 12 shares of wild type or half-wild type varieties. When genetic similarity coefficient 0.897 was used as criterion L2, these 32 shares 32 shares of cultivars could be further grouped into four sub-clusters. The genetic diversities between cultivars and wild type or half-wild type varieties were 0.47-0.91, showing huge hereditary difference;while that among 32 cultivars were 0.85-0.97, suggesting that genetic relationships among cultivars are relatively close and their genetic similarities were rather narrow. [Conclusion]ISSR could well determine the genetic similarities among kenaf germplasm resources and provide valuable molecular information for selecting parents of hybrid cross, which can lay a good foundation for DNA mapping of kenaf germplasm resources.%[目的]揭示不同地区来源红麻材料的遗传多样性及亲缘关系,为红麻遗传改良和分子标记辅助育种提供依据.[方法]用ISSR分子标记方法分析44份不同地区来源红麻种质资源的遗传多样性和亲缘关系,从91个ISSR引物中筛选出多态性较好、条带最清晰的21个引物对其进行PCR扩增,采用NTSYSpc-2.10e分析软件计算样品间的遗传相似系数,同时用UPGMA进行聚类分析,构建聚类图.[结果]21条引物共扩增出169条带,平均每个引物扩增出8.05条,其中多态性条带共141条,多态性条带比率为83.4%;当在遗传相似系数为0.887处作切割线L1时,可将44份红麻材料中的32份栽培品种与12份野生半野生材料分开;当在遗传相似系数为0.897处作切割线L2时,可将32份栽培种进一步细分为4个亚群;栽培种与野生半野生种间的遗传相似系数在0.47～0.91之间,表现出较大的遗传差异性,而32份栽培种材料中,遗传相似系数在0.85～0.97之间,表明栽培种材料间的亲缘关系较近,遗传多样性较为狭窄.[结论]ISSR可以较好地确定红麻种质资源的遗传多样性的亲缘关系,能够为杂交育种亲本选择组配提供有价值的分子水平上的信息,可为开展红麻核心种质DNA图谱研究奠定基础.
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