The loss of genetic diversity during captive breeding of the endangered sculpin, Trachidermus fasciatus, based on ISSR markers: implications for its conservation

  • Xiaoxiao Bi (毕潇潇)
  • Qiaoli Yang (杨巧莉)
  • Tianxiang Gao (高天翔)
  • Chuangju Li (李创举)
Biology

DOI: 10.1007/s00343-011-0185-5

Cite this article as:
Bi, X., Yang, Q., Gao, T. et al. Chin. J. Ocean. Limnol. (2011) 29: 958. doi:10.1007/s00343-011-0185-5
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Abstract

Inter-simple sequence repeat (ISSR) markers were used to determine the genetic variation and genetic differentiation of cultured and wild populations of Trachidermus fasciatus, an endangered catadromous fish species in China. Six selected primers were used to amplify DNA samples from 85 individuals, and 353 loci were detected. Relatively low genetic diversity was detected in the cultured population (the percentage of polymorphic loci PPL = 73.80%, Nei’s gene diversity h = 0.178 2, Shannon information index I = 0.276 9). However, the genetic diversity at the species level was relatively high (PPL = 91.78%; h = 0.258 3, I = 0.398 6). The UPGMA tree grouped together the genotypes almost according to their cultured and wild origin, showing distinct differences in genetic structure between wild and cultured populations. The pairwise Fst values confirmed significant genetic differentiation between wild and cultured samples. The cultivated population seems to be low in genetic diversity as a result of detrimental genetic effects in the captive population. The results suggest that ISSR markers are effective for rapid assessment of the degree of diversity of a population, thus giving important topical information relevant to preserving endangered species.

Keyword

inter-simple sequence repeat (ISSR) Trachidermus fasciatus conservation genetic diversity genetic differentiation 

Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Xiaoxiao Bi (毕潇潇)
    • 1
  • Qiaoli Yang (杨巧莉)
    • 1
  • Tianxiang Gao (高天翔)
    • 1
  • Chuangju Li (李创举)
    • 2
  1. 1.Fisheries CollegeOcean University of ChinaQingdaoChina
  2. 2.Yangtze River Fisheries Research InstituteChinese Academy of Fishery SciencesJingzhouChina

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