Isolation and characterization of microsatellite DNA markers in endangered Mekong giant catfish Pangasianodon gigas

Yoshihisa Ohashi, Masamichi Nakajima, Narueron Sukumasavin, Uthairat Na-Nakorn, Nobuhiko Taniguchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The Mekong giant catfish is one of the largest freshwater fish in the world, and is endemic to the Mekong basin. Recently, the number of Mekong giant catfish has drastically decreased. In this study, seven microsatellite DNA markers of the Mekong giant catfish were developed for evaluation of the species' genetic diversity. Mendelian inheritance of four of seven markers was confirmed using offspring (F1) produced from one pair. Number of alleles per locus in the founder population ranged 1-4 with a mean of 2.8, and that in F1 ranged 1-2 with a mean of 1.6. The expected heterozygosity in the founder population ranged 0-0.66 with a mean of 0.38, and that in F1 ranged 0-0.5 with a mean of 0.28. The mean expected heterozygosity in the founder population is apparently lower than that in Pangasius bocourti and other freshwater species, but higher than that in endangered species. In the future, the microsatellite data in this study will be used in minimal kinship approaches, because these individuals constitute the basic seed for release into wild in an effort to conserve the native population of Mekong giant catfish.

Original languageEnglish
Pages (from-to)1066-1071
Number of pages6
JournalFisheries Science
Volume72
Issue number5
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Endangered
  • Genetic diversity
  • Mekong basin
  • Mekong giant catfish
  • Microsatellite DNA
  • Pangasianodon gigas
  • Pangasiidae

ASJC Scopus subject areas

  • Aquatic Science

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