Genetic diversity of two successive generations of selection in bighead catfish (Clarias macrocephalus) populations

Selective programs associated with domestication can improve fish production but also have an impact on broodstock’s genetic diversity. In this study, the diversity of original sources (G0) from wild and cultured bighead catfish populations, as well two successive generations (G1 G2) subjected to selection experiments, was assessed. G0 adults were collected in Ca Mau conservation area a hatchery Can Tho. The G1 included pure crosses crossbreeds G0, while G2 offspring selected G1. Fin clips 27 29 individuals each group randomly sampled for analysis. amplification results using six ISSR primers showed that relatively higher (effective number alleles Ne 1.43 1.49; heterozygosity He 0.265 0.290) than (Ne = 1.32±0.04; 0.201±0.023) 1.34±0.04; 0.216±0.023). Genetic differences increased between populations descending generations. To reduce detrimental impacts low domesticated Mekong Delta, it is recommended broodstock later should be produced larger...