Genetic structure of the Korean black scraper Thamnaconus modestus inferred from microsatellite marker analysis

An, Hye Suck, Lee, Jang Wook, Park, Jung Yeon, & Jung, Hyung Taek (2013) Genetic structure of the Korean black scraper Thamnaconus modestus inferred from microsatellite marker analysis. Molecular Biology Reports, 40(5), pp. 3445-3456.

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Abstract

The Korean black scraper, Thamnaconus modestus, is one of the most economically important maricultural fish species in Korea. However, the annual catch of this fish has been continuously declining over the past several decades. In this study, the genetic diversity and relationships among four wild populations and two hatchery stocks of Korean black scraper were assessed based on 16 microsatellite (MS) markers. A total of 319 different alleles were detected over all loci with an average of 19.94 alleles per locus. The hatchery stocks [mean number of alleles (N A) = 12, allelic richness (A R) = 12, expected heterozygosity (He) = 0.834] showed a slight reduction (P > 0.05) in genetic variability in comparison with wild populations (mean N A = 13.86, A R = 12.35, He = 0.844), suggesting a sufficient level of genetic variation in the hatchery populations. Similarly low levels of inbreeding and significant Hardy–Weinberg equilibrium deviations were detected in both wild and hatchery populations. The genetic subdivision among all six populations was low but significant (overall F ST = 0.008, P < 0.01). Pairwise F ST, a phylogenetic tree, and multidimensional scaling analysis suggested the existence of three geographically structured populations based on different sea basin origins, although the isolation-by-distance model was rejected. This result was corroborated by an analysis of molecular variance. This genetic differentiation may result from the co-effects of various factors, such as historical dispersal, local environment and ocean currents. These three geographical groups can be considered as independent management units. Our results show that MS markers may be suitable not only for the genetic monitoring of hatchery stocks but also for revealing the population structure of Korean black scraper populations. These results will provide critical information for breeding programs, the management of cultured stocks and the conservation of this species.

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11 citations in Scopus
11 citations in Web of Science®
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ID Code: 87252
Item Type: Journal Article
Refereed: Yes
Keywords: Thamnaconus modestus, Korean black scraper, Genetic diversity, Genetic structure
DOI: 10.1007/s11033-012-2044-7
ISSN: 1573-4978
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > Schools > School of Earth, Environmental & Biological Sciences
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © Springer Science+Business Media Dordrecht 2013
Deposited On: 10 Sep 2015 02:37
Last Modified: 16 Sep 2015 22:36

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