Mitochondrial DNA markers reveal genetic connectivity among populations of Osteoglossiform fish Chitala chitala.

Abstract

Genetic diversity and population structure in Indian featherback fish, Chitala chitala (Hamilton, 1822) was investigated by combined analyses of two full mitochondrial genes, ATPase 6/8 and Cytochrome b. A total of 403 individuals, collected from 14 rivers yielded 61 haplotypes. Hierarchical partitioning analysis identified 19.01% variance ?among? and 80.99% variance ?within groups and populations?. The mean coefficient of genetic differentiation (FST) was observed to be significant 0.26 (p<0.05). Mantel tests rejected the hypothesis that genetic and geographic distances were correlated. The patterns of genetic differentiation, AMOVA and principal coordinate analyses indicated that natural populations were sub-structured and comprised of four genetic stocks of C. chitala in Indian rivers. The results also supported the higher resolution potential of concatenated gene sequences. The knowledge of genetic variation and divergence, from this study, can be utilized for its scientiffc conservation and management in the wild.