title: Allozyme variation in a threatened freshwater fish, spotted murrel (Channa punctatus) in a South Indian river system.
abstract: Samples of the spotted murrel (Channa punctatus) were collected from three rivers of Tamil Nadu and Kerala. The allozyme variation of C. punctatus was investigated by polyacrylamide gel electrophoresis. Eighteen enzymes were detected, but only 10 (EST, PGM, G3PDH, G6PDH, SOD, GPI, ODH, GDH, XDH, and CK) showed consistent phenotypic variations. Allele frequencies were estimated at the 18 polymorphic loci representing 10 enzymes. Two rare alleles, EST-4*C and G6PDH-2*C, were noted in the Tamirabarani and Kallada populations but were absent in the Siruvani population. The allele frequencies of the Tamirabarani and Kallada populations were similar, except for a few loci. Among the three populations, the maximum genetic distance (0.026) and FST (0.203) were found between the geographically distant Siruvani and Kallada populations. Overall the study showed that among the three populations, the Tamirabarani and Kallada have similar genetic structures.
authors.affiliation: Center for Aquaculture Research and Extension, St. Xavier's College, Palayamkottai, 627 002 Tamil Nadu, India. haniffacare@gmail.com
authors.forename: Mohamed Abdulkather
authors.initials: MA
authors.lastname: Haniffa
authors.forename: Muniyandi
authors.initials: M
authors.lastname: Nagarajan
authors.forename: Achamveetil
authors.initials: A
authors.lastname: Gopalakrishnan
authors.forename: Kochikkaran Kunjumohammed
authors.initials: KK
authors.lastname: Musammilu
mesh_terms: D000483:Alleles; D000818:Animals; D004798:Enzymes / Q000235:genetics*; D005399:Fishes / Q000235:genetics*; D005787:Gene Frequency; D014644:Genetic Variation / Q000235:genetics*; D005843:Geography; D007194:India; D045483:Rivers
chemical_list: D004798:Enzymes