Annals of Forest Science

, 68:1143

Genetic variation within and between populations of a desert poplar (Populus euphratica) revealed by SSR markers

Authors

  • Juan Wang
    • Molecular Ecology Group, Key Laboratory of Arid and Grassland EcologyLanzhou University
  • Zhijun Li
    • Life School of Plant ScienceTalimu University
  • Qiuhong Guo
    • Molecular Ecology Group, Key Laboratory of Arid and Grassland EcologyLanzhou University
  • Guangpeng Ren
    • Molecular Ecology Group, Key Laboratory of Arid and Grassland EcologyLanzhou University
    • Molecular Ecology Group, Key Laboratory of Arid and Grassland EcologyLanzhou University
Original Paper

DOI: 10.1007/s13595-011-0119-6

Cite this article as:
Wang, J., Li, Z., Guo, Q. et al. Annals of Forest Science (2011) 68: 1143. doi:10.1007/s13595-011-0119-6

Abstract

Backgroud

Populus euphratica Oliv., a long-lived woody perennial plant, is the only forest species naturally distributed in desert regions. Severe desertification has resulted in this species becoming endangered, and its populations are seriously fragmented in northwest China.

Objectives

We investigated the within-population and long-distance separated population diversity in northwest China using eight pairs of simple sequence repeat markers.

Results

Our results reveal that this species has high overall genetic diversity with a mean of 12.125 alleles per locus; its expected heterozygosity (He) ranged from 0.713 to 0.878. However, there was a high level of genetic diversity within the species (when compared within congeneric species) and low genetic differentiation between populations (average Fst = 0.093). Analyses of molecular variance suggested that 5.21% of the total molecular variance was attributable to between-population diversity (P < 0.001), while the remainder of the variance was associated with differences within populations. There was no distinct correlation between geographical distributions and genetic variation.

Conclusions

We found no evidence to support our initial hypothesis of low genetic diversity within the species and high differentiation between populations separated by long distances. The recent fragmentations of this species due to anthropologic and environmental effects resulted in its endangered status.

Keywords

Populus euphraticaSimple sequence repeat (SSR)Genetic diversityGenetic differentiation

Copyright information

© INRA and Springer Science+Business Media B.V. 2011