Population genetic diversity and structure of Schisandra sphenanthera, a medicinal plant in China

作者 YAN Bo-qian; WANG Ting; HU Li-le

期刊 Chinese Journal of Ecology , 2009,5:28

摘要 Schisandra sphenanthera has been used as a traditional medicinal plant, possessing a tremendous potential for commercial development. Population genetic information on S. sphenan-thera will be helpful for its evaluation, utilization and conservation. Genetic diversity and struc-ture in ten natural populations of the species were analysed by using nine SSR markers developed by the authors. A total of 58 alleles were detected, and the mean expected heterozygosity (H_E) and observed heterozygosity (H_O) were 0. 528 and 0. 519, respectively. Large continuous popu-lations maintained relatively high degree of genetic diversity, whereas small populations exhibited low genetic diversity. In S. sphenanthera, the estimated level of inbreeding was significant with the F_(IS) of 0. 042. The population genetic differentiation was 0. 108. Across all populations, each pairwise comparison of genetic differentiation as meaured by F_(ST) was significant. Bayesian cluste-ring analysis revealed two genetic clusters: south and north populations drew by the Yangtse Riv-er. The special natural barrier and subsequent recolonization play a role in the formation of popu-lation genetic structure in S. sphenanthera.

涉及物种 华中五味子 Schisandra sphenanthera