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Chromosomal analysis of Roeboides paranensis (Pisces, Characidae) from the Paraná River

Isabel Cristina Martins-Santos; Mara Garcia Tavares

Departamento de Biologia Celular e Genética e NUPELIA, Universidade Estadual de Maringá, 87020-900 Maringá, PR, Brasil. Send correspondence to I.C.M.-S.

ABSTRACT

A cytogenetic study of Roeboides paranensis from the Paraná River showed a diploid number equal to 52 chromosomes, with a basic karyotype consisting of two metacentric pairs, 10 submetacentric pairs, four subtelocentric pairs and 10 acrocentric pairs (FN = 84). The NORs were located in the terminal position on the short arms of the third chromosome pair in the complement. Heterochromatin was found to be mostly centromeric and telomeric, with some interstitial blocks.

Keywords: hromosomal analysis; Roeboides paranensis.

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