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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Sep 2015, 36 (5)                                     Back

nstantaneous and historical temperature effects on a-pinene

Genetic differentiation of wild and hatchery populations of

Indian major carp Cirrhinus cirrhosus in Bangladesh


Md. Rajib Sharker1, Muhammad Abu Bakar Siddik1*, Ashfaqun Nahar2 , Md. Shahjahan3,4 and Abdullah Al Faroque5

1Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

2Department of Marine Fisheries and Oceanography, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

3Sado Marine Biological Station, Faculty of Science, Niigata University, Sado, Niigata-952-2135, Japan

4Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

5Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

*Corresponding Author E-mail:




Publication Data

Paper received:

20 October 2014


Revised received:

17 April 2015



05 June 2015



Genetic differentiation of Cirhinus cirrhosus, three river (Halda, Jamuna and Padma) and six hatchery (Brahmaputra, Reliance, Kazi, Rupali, Bismillah and Pacific) populations covering a wide range of geographical distribution of this species were analyzed by allozyme electrophoresis. Four enzymes encoded by 7 loci were screened, where 3 loci were polymorphic (Mdh-1*, Mdh-2*, Gpi-1*). The results showed that polymorphic loci per population (28.57%), mean proportion of heterozygous loci per individual (10.000), mean number of alleles per locus (1.286), and relative gene diversity (0.148) in river populations were higher than those for hatchery populations (23.81, 6.677, 1.238, 0.140, respectively). Also, the observed heterozygosity (Ho) and expected heterozygosity (He) in river populations (0.086 and 0.112, respectively) were higher than those of hatchery populations (0.046 and 0.106, respectively). The pairwise population differentiation (FST) values showed a lower level of genetic differentiation between hatchery and river population pairs. The unweighted pair-group method with arithmetic mean dendrogram of Nei's genetic distances showed relationship between genetic distance and geographic distance. Population were clustered into three groups: Halda, Padma and Jamuna river population in one group; Brahmaputra, Reliance and Kazi hatchery populations in second group and Rupali, Bismillah and Pacific hatchery population in third group. The present study revealed that there were obvious genetic variations among the natural and hatchery populations. ???   



 Key words

Allozyme electrophoresis, Allele frequency, Genetic diversity, Polymorphic loci



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