National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Haors, are important source of freshwater fish (both production and diversities) population in Bangladesh which is mostly found in greater Sylhet district. Based on this fisheries diversity a large number of fish hatcheries have developed here for commercial aquaculture in this area but the genetic statuses in terms of effective breeding number, heterozygosity, genetic distance among population groups etc. of these hatcheries remain unknown. Therefore, to know the genetic status of these fish hatcheries the present study was carried out. This study reveals the genetic variation of hatchery populations of Catlacatla from three major hatcheries in Sylhet district named Mahbub Fish Hatchery, Shurma Gate Fish Hatchery, and Nabigonj Fish Hatchery in contrast to Padma river population as a wild population. The study was based on analysis of six microsatellite loci. The average number of alleles was ranged from 5.00 in the Shurma Gate Fish Hatchery to 6.33 in the Mahbub Fish Hatchery. Deviation from Hardy-Weinberg equilibrium was observed depending on the locus. Significant dwindle of heterozigosity was observed among the populations provided an indication that populations were may be under stress due to inbreeding , low number of effective individuals (Ne) and collection of brood from nearby hatcheries. The unweighted pair group method with averages (UPGMA) dendrogram based on genetic distance resulted in two clusters: the Padma river population was alone in one cluster whereas the rest of the populations made another cluster.
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