Abstract: To investigate the genetic diversity and genetic structure of different Tamarix germplasm resources， this study employed SSR molecular markers to analyze 117 plants representing 13 germplasm resources， including Tamarix ramosissima， T. hispida， and T. densiflora. The aim is to provide a theoretical basis for the breeding and conservation of Tamarix. The results showed that 10 pairs of SSR primers amplified 89 alleles， with a Shannon’s information index （I） of 1.543 and a polymorphism information content （PIC） of 0.671， indicating that Tamarix possesses abundant polymorphism and genetic diversity. The 13 Tamarix germplasm resources were clustered into four groups. AMOVA analysis indicated that the genetic variation of Tamarix mainly existed within individuals. In light of these characteristics， it is suggested that in-situ conservation strategies should prioritize the preservation of different individual types within large-scale populations to prevent the loss of genetic resources caused by human disturbance.

Key words: Tamarix, SSR molecular markers, Genetic diversity analysis, Genetic structure analysis

摘要： 为了探究柽柳属（Tamarix ）不同种质资源的遗传多样性和遗传结构，本研究运用SSR分子标记方法对多枝柽柳、刚毛柽柳、密花柽柳等13个柽柳属不同种质资源的117个样本开展遗传多样性分析，以期为柽柳的繁育和保护工作提供理论依据。结果表明：10对SSR引物扩增出89个等位基因，香农信息指数（I）为1.543；多态信息含量（Polymorphism information content，PIC）为0.671，表明柽柳具有丰富的多态性和遗传多样性。13个柽柳属不同种质资源被分为四类。AMOVA分析表明柽柳的遗传变异主要存在于个体内，针对以上特点，建议在采取就地保护策略时，要重视大范围群体内不同种类型个体的保存，尽可能防止人为破坏带来的遗传资源的流失。

关键词: 柽柳属, SSR分子标记, 遗传多样性分析, 遗传结构分析