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.
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ACKNOWLEDGMENTS
We are grateful to the Indian Council of Agricultural Research, New Delhi, for financial assistance [F. No. 4-12/99-ASR-I]. Thanks are due to Rev. Dr. A. Antonysamy S.J., Principal, St. Xavier’s College, Palayamkottai, for providing necessary facilities.
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Haniffa, M., Nagarajan, M., Gopalakrishnan, A. et al. Allozyme Variation in a Threatened Freshwater Fish, Spotted Murrel (Channa punctatus) in a South Indian River System. Biochem Genet 45, 363–374 (2007). https://doi.org/10.1007/s10528-007-9080-3
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DOI: https://doi.org/10.1007/s10528-007-9080-3