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BIBTEX RIS

Occurrence of B chromosomes in Cyphocharax modestus (Fernández-Yépez, 1948) and Steindachnerina insculpta (Fernández-Yépez, 1948)(Characiformes, Curimatidae) from the Tibagi River basin (Paraná State, Brazil)

2007; Instituto Internacional de Ecologia (Brazil); Volume: 67; Issue: 4 suppl Linguagem: Inglês

10.1590/s1519-69842007000500014

ISSN

1678-4375

Autores

Waleska Gravena, R. Teribele, Lúcia Giuliano-Caetano, AL. Dias,

Tópico(s)

CRISPR and Genetic Engineering

Resumo

We cytogenetically analyzed 18 individuals of Cyphocharax modestus, and 41 individuals of Steindachnerina insculpta from the Tibagi River basin (Paraná State, Brazil). All the specimens had 2n = 54 chromosomes, all meta-submetacentric (M-SM). The presence of 1 or 2 B chromosomes was seen in some individuals of C. modestus of the two sampled populations, showing inter- and intra individual variation. In S. insculpta, B chromosomes were also observed but only in one population, also showing inter- and intra individual variation. C-banding was used to show that the identified B chromosomes were totally heterochromatic in the two examined species.

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