Genetic diversity of the threatened Chinese endemic plant, Sinowilsonia henryi Hemsi. (Hamamelidaceae), revealed by inter-simple sequence repeat (ISSR) markers

摘要: Sinowilsonia henryi Hemsi., the only representative of monotypic genus Hemsi. (Hamamelidaceae), is a threatened plant endemic to China with high phylogenetical, ecological and economical values. In present study, inter-simple sequence repeat (ISSR) markers were employed investigate genetic diversity differentiation 214 individuals sampled from 14 populations. Fifteen selected primers yielded total 178 bright discernible bands. The was low at population level (h = 0.1025; I = 0.1506; PPL = 26.7%), but quite species (h = 0.2449; I = 0.3690; PPL = 72.5%). line limited gene flow (Nm = 0.3537), hierarchical analysis molecular variance (AMOVA) revealed pronounced among populations (ΦST = 0.6639). Furthermore, Mantel test significant correlation between geographic distances (r = 0.688, P = 0.001), indicating role isolation in shaping its structure. patterns S. assumed result largely evolutionary history factors. Based on these findings, conservation strategies proposed preserve this plant.