Academic Research Journal of Agricultural Science and Research

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Academic Research Journal of Agricultural Science and Research 

Vol. 3(6), pp. 111-120. June, 2015.

ISSN: 2360-7874 

 DOI: 10.14662/ARJASR2015.018


Full Length Research

Genetic and Biochemical Basis of Growth Variation in Bred Clarias gariepinus (Burchell 1822)


*1Oyebola O.O.; Kajopaye A.K. 2 and Awodiran M.O. ³


1Department of Aquaculture and Fisheries Management, University of Ibadan, Ibadan, Nigeria

2Department of Animal Production, Olabisi Onabanjo University, Ago-Iwoye, Nigeria

3Department of Zoology, Obafemi Awolowo University, Ile-Ife, Nigeria

*Correspondence email:


Accepted 24 April 2015



Challenges of size variants (shooters and runts) in bred Clarias gariepinus could be solved if relevant information on the basis of the heterogeneity is known. Genetic and biochemical basis of growth variation in C. gariepinus was investigated in this study. Tissue samples of four fastest growers- S (4.16±2.40g)) and least four growers- R (0.59±0.83g) in a 6weeks old population of bred Clarias gariepinus were subjected to Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis (SDS-PAGE). Bands were analyzed for differentiating locus for S and R. These loci were compared with kDa ladder to determine molecular weight and biochemical implications. Variants’ genotypes were analyzed for phylo-genetic relationship using cluster analysis. At <14.7 and >150kDa loci, S and R were differentiated. These loci correspond with α-amylase inhibitor and polymorphic Prostatic Growth Factor-1 (PGF-1) locus respectively. At 0.75 coefficient of similarity, genotypes grouped to two major clusters. All R-group members and one of S-group members were on a cluster while all other S-group members formed another cluster. In the studied C. gariepinus population, growth heterogeneity has genetic and biochemical basis. Fast growers were more genetically versatile. Obtained knowledge is important in discrimination and utilization of fast growers, Marker Assisted Selection (MAS) and breeding programmes planning.

Keywords: Growth variation, genotype, Biochemical differentiation, phylogeny, Clarias gariepinus


How to cite this article: Oyebola OO,  Kajopaye AK, Awodiran MO (2015). Genetic and Biochemical Basis of Growth Variation in Bred Clarias gariepinus (Burchell 1822) . Acad. Res. J. Agri. Sci. Res.  3(6):111-120. 




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