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vol.20 número3Estimated frequency of B-chromosomes and population density of Astyanax scabripinnis paranae in a small streamEffect of taxol on chromosome aberrations induced by gamma radiation or by doxorubicin in Chinese hamster ovary cells índice de autoresíndice de materiabúsqueda de artículos
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Brazilian Journal of Genetics

versión impresa ISSN 0100-8455versión On-line ISSN 1678-4502


REVALDAVES, Eloísa; RENESTO, Erasmo  y  MACHADO, Maria F.P.S.. Genetic variability of Prochilodus lineatus (Characiformes, Prochilodontidae) in the upper Paraná river. Braz. J. Genet. [online]. 1997, vol.20, n.3, pp.-. ISSN 0100-8455.

The genetic variability of the "curimba", Prochilodus lineatus, from three locations in the Paraná river basin, was investigated by starch gel electrophoresis. A total of 160 specimens were analyzed for 19 enzymes, 12 of which permitted successful interpretation of electrophoretic patterns. Eighteen loci were identified and six of them proved to be polymorphic (EST-1*, EST-2*, IDH-1*, PGM-1*, PGM-2*, LDH-2*). Mean heterozygosity was considered high (13%) by comparison with the literature. A low level of differentiation was found among subpopulations, with mean FST = 0.018. Values of genetic distance and genetic identity suggest that, at least along this stretch of the river, P. lineatus comprises a single breed with high gene flow. This analysis has important implications for fishery management, aquaculture, and conservation of the stocks

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