Abstract
The patterns of genetic variability and genetic differentiation among five wild and five hatchery populations of Catla catla
were assessed using 15 microsatellite markers in a total of 500 individuals (50 individuals per population). In both wild and
hatchery populations of C. catla, the level of genetic diversity was observed low-to-moderate in terms of an average allelic
richness (Ar), the alleles number (Na), the number of effective alleles (Nea) and observed heterozygosity (Ho). The highest
mean values of Na, Nea and Ar were found in the wild populations in comparison to hatchery populations. On the average
base, the values of inbreeding coefficient (FIS) in hatchery populations were found high. Total 13 out of 150 tests were found
to deviate from HWE significantly at p˂0.05. The pairwise estimates of FST revealed limited genetic differentiation between
hatchery but low-to-moderate among wild populations. Most of the variation was found within individuals by applying
AMOVA. Analysis of genetic relatedness among all the populations was estimated by constructing UPGMA dendrogram that
showed two main clusters. The outcomes of the study would be helpful in resolving the genetic issues relating to C. catla restocking plans and broodstock management practices.
