Abstract

The karyotypic and C-banding analysis of five species of Indian frogs belonging to the genus Fejervarya (F. cf. limnocharis, F. cf. brevipalmata, F. cf. keralensis, F. rufescens and F. sahyadris), which are distributed in the Western Ghats, Southwestern India, was carried out. All species had 2n=26 chromosomes with five large and eight small pairs. Most chromosomes were metacentric or submetacentric, and only no. 9 pair of F. cf. brevipalmata was subtelocentric chromosome. Nos. 1, 12 and 13 were metacentric and no. 3 was submetacentric in all the species analyzed. In F. cf. brevipalmata, an achromatic gap was present in the pericentric region of no. 6 chromosome. The chromosome pair no. 11 of F. cf. keralensis had a secondary constriction with a prominent satellite in the short arm. In three of the five species, C-positive regions were confined to the centromere of each chromosome, but F. rufescens and F. sahyadris showed non-centromeric C-bands on both ends of three pairs of large chromosomes, in addition to the centromeric C-bands. None of the species had identifiable sex chromosomes. The results are compared with karyotypes of the other Fejervarya species and the possible causes for the inter-specific karyological divergence are discussed.

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