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Allozyme variation and geographic differentiation in the Chilean leptodactylid frog Batrachyla taeniata (Girard, 1854)

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Electrophoretic variation in proteins encoded by 15 loci was analyzed in nine populations of the Chilean leptodactylid frog Batrachyla taeniata. The overall proportion of polymorphic loci was estimated to be 16.2% and the average number of alleles per locus, 1.18. The mean observed and expected heterozygosities for the populations were 0.9% and 5.9%, respectively. The average Rogers genetic distance among pairs of populations was 0.105. F statistics analysis showed high levels of genetic subdivision (Fst = 0.450). An isolation-by-distance test indicated significant correlation between genetic and geographical distance.

Resumen. Se analizó la variabilidad electroforética de proteínas codificadas por 15 loci en nueve poblaciones de la rana leptodactílida chilena Batrachyla taeniata. La proporción general de loci polimórficos se estimó en 16,2% y el número promedio de alelos por locus en 1,18. Las heterocigosidades observadas y esperadas promedio fueron 0,9% y 5,9% respectivamente. El promedio de la distancia de Rogers entre pares de poblaciones fue 0,105. El análisis estadístico de F mostró altos niveles de subdivisión genética (Fst = 0,450). El análisis del aislamiento por distancia indicó una correlación significativa entre la distancia genética y la distancia geográfica.


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