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      Genetic variation in the endangered Anisodus tanguticus (Solanaceae), an alpine perennial endemic to the Qinghai-Tibetan Plateau.

      1 ,   , ,
      Genetica
      Springer Science and Business Media LLC

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          Abstract

          We used random amplified polymorphic DNA markers (RAPDs) to assess genetic variation between- and within-populations of Anisodus tanguticus (Solanaceae), an endangered perennial endemic to the Qinghai-Tibetan Plateau with important medicinal value. We recorded a total of 92 amplified bands, using 12 RAPD primers, 76 of which (P=82.61%) were polymorphic, and calculated values of H(t) and H(sp) of 0.3015 and 0.4459, respectively, suggesting a remarkably high rate of genetic variation at the species level. The average within-population diversity also appeared to be high, with P, H(e) and H(pop) values of 55.11%, 0.1948 and 0.2918, respectively. Analyses of molecular variance (AMOVA) showed that among- and between-population genetic variation accounted for 67.02% and 32.98% of the total genetic variation, respectively. In addition, Nei's coefficient of differentiation (G(ST)) was found to be high (0.35), confirming the relatively high level of genetic differentiation among the populations. These differentiation coefficients are higher than mean corresponding coefficients for outbreeding species, but lower than reported coefficients for some rare species from this region. The genetic structure of A. tanguticus has probably been shaped by its breeding attributes, biogeographic history and human impact due to collection for medicinal purposes. The observed genetic variations suggest that as many populations as possible should be considered in any planned in situ or ex situ conservation programs for this species.

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          Author and article information

          Journal
          Genetica
          Genetica
          Springer Science and Business Media LLC
          0016-6707
          0016-6707
          Feb 2008
          : 132
          : 2
          Affiliations
          [1 ] Key Laboratory of the Qinghai-Tibetan Plateau Ecosystem and Biological Evolution and Adaptation, Northwest Institute of Plateau Biology, The Chinese Academy of Sciences, Xining, Qinghai 810001, PR China.
          Article
          10.1007/s10709-007-9154-5
          17516136
          f0737a6f-8656-4db0-88e0-918ac33c07df
          History

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