Author : Sanga Leesanga

Summary : Yellow catfish, Mystus nemurus, was examined to determine levels of genetic subpopulation differentiation among samples of this species obtained from different parts of its range, as well as to compare the genetics of wild and hatchery-bred fish. Horizontal starch gel electrophoresis and histochemical staining techniques were used to examine genetic variation within and among8 wild and one hatchery populations of M. nemurus in Thailand. Individual specimens were analyzed at 23 protein-coding loci. Fifteen of the 23 loci examined (65.22%) were polymorphic. The greatest genetic distance was found between the Chainat and Suratthani populations (0.164), which probably, a level indicative of subspecific differentiation in M. nemurus from within Thailand.