Cytogenetic characterization of Geophagus brasiliensis and two species of Gymnogeophagus (Cichlidae: Geophaginae) from Guaiba Lake, RS, Brazil

• Authors: Pires L. Bettin_ , L. Giuliano-Caetano , A.L. Dias
• Languages of publication: EN

Abstracts

EN

The karyotypes of three species of fish of the Cichlidae family from the Forqueta river and several locations in Gua?ba lake/RS (Brazil) were analyzed. All species presented 2n=48, while Gymnogeophagus gymnogenys showed two karyotypic formulae: 4m+44st-a with FN=52 and 6m+42st-a with FN=54. Gymnogeophagus labiatus presented 4m+4sm+40st-a and FN=56 and Geophagus brasiliensis 4sm+44st-a and FN=52. Simple NORs were found in all species with the exception of a population of G. gymnogenys from Saco da Alemoa/Barra do Ribeiro. CMA3 staining revealed NOR sites, while DAPI staining was negative and heterochromatin was limited to pericentromeric regions and associated to NORs, except in G. labiatus. The data show a conserved pattern in Geophagus brasiliensis and karyotype variation in the species of Gymnogeophagus.

Keywords

EN

CHROMOSOME BANDING; DIPLOID; KARYOTYPE; PERCIFORMES

Discipline

• EXPERIMENTAL_BIOLOGY_&_MEDICINE: EXPERIMENTAL BIOLOGY & MEDICINE

• Publisher: Institute of Systematics and Evolution of Animals, Polish Academy of Sciences
• Journal: Folia Biologica
• Year: 2010
• Volume: 58
• Issue: 1-2
• Pages: 29-34

Contributors

author

Pires L. Bettin_

author

L. Giuliano-Caetano

author

A.L. Dias

• Document Type: ARTICLE
• Publication order reference: Anna Lucia Dias, Universidade Estadual de Londrina, CCB ? Departamento de Biologia Geral, 86051-990, Londrina, PR, Brasil