Molecular Biology Reports

, Volume 38, Issue 4, pp 2225–2232

Genetic variation and phylogenetic relationship between two species of yellow catfish, Horabagrus brachysoma and H. nigricollaris (Teleostei: Horabagridae) based on RAPD and microsatellite markers

Authors

    • National Bureau of Fish Genetic Resources (NBFGR) Cochin Unit, CMFRI Campus
    • Neurovascular Oxidative Injury Laboratory, Department of Pharmacology and Experimental NeuroscienceUniversity of Nebraska Medical Center
  • A. Gopalakrishnan
    • National Bureau of Fish Genetic Resources (NBFGR) Cochin Unit, CMFRI Campus
  • Remya Shivanandan
    • National Bureau of Fish Genetic Resources (NBFGR) Cochin Unit, CMFRI Campus
  • V. S. Basheer
    • National Bureau of Fish Genetic Resources (NBFGR) Cochin Unit, CMFRI Campus
  • A. G. Ponniah
    • Central Institute of Brackish water Aquaculture (CIBA)
Article

DOI: 10.1007/s11033-010-0352-3

Cite this article as:
Muneer, P.M.A., Gopalakrishnan, A., Shivanandan, R. et al. Mol Biol Rep (2011) 38: 2225. doi:10.1007/s11033-010-0352-3

Abstract

The two species of yellow catfish, Horabagrus brachysoma and H. nigricollaris are categorized as ‘endangered’ and ‘critically endangered’ respectively in their wild habitat. Proper knowledge of genetic structure and variability of these endangered species are highly essential for the management, conservation and improvement of fish stocks. Therefore, genetic variation and phylogenetic relationships between these species of yellow catfish sampled from Chalakkudy River in the hot spot of biodiversity-Western Ghats region, Kerala, India were analyzed by using Random amplified polymorphic DNA (RAPD) and microsatellite markers. 85 RAPD and five microsatellites loci were detected to analyze the genetic variation and phylogenetic relationships among these species. Out of 85 RAPD loci produced only 52.94% were polymorphic whereas in microsatellite, all 5 loci were polymorphic (100%). Species-specific RAPD bands were found in both species studied. In microsatellite, the number of alleles across the five loci ranged from 1 to 8. The observed heterozygosities in H. brachysoma and H. nigricollaris were 0.463 and 0.443, respectively. Here, both RAPD and microsatellite methods reported a low degree of gene diversity and lack of genetic heterogeneity in both species of Horabagrus which strongly emphasize the need of fishery management, conservation and rehabilitation of these species.

Keywords

HorabagrusPhylogenyRAPDGenetic variationMicrosatellitesPolymorphism

Copyright information

© Springer Science+Business Media B.V. 2010