Description of the karyotype of Geophagus cf. proximus (Perciformes, Cichlidae, Geophaginae) - doi: 10.4025/actascibiolsci.v35i1.11711

Description of the karyotype of Geophagus cf. proximus (Perciformes, Cichlidae, Geophaginae) - doi: 10.4025/actascibiolsci.v35i1.11711

This study described the karyotype of Geophagus cf. proximus. Specimens were collected in Água Preta Lake, Parque Ambiental de Belém, Pará State, Brazil. The karyotype were 2n = 48 chromosomes (FN = 60: 12M/SM+36ST/A) and no sexual chromosome differentiation. C-banding showed centromeric staining in...

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Veröffentlicht in:Acta scientiarum. Biological sciences 2012-08, Vol.35 (1)
Hauptverfasser: Carlos Alberto Machado da Rocha, Augusto César Paes de Souza, Ramayanna da Silva Rayol, Helem Ferreira Ribeiro
Format: Artikel
Sprache:eng
Schlagworte:
Ag-NOR technique
C-banding
cytogenetic
Geophagus
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Zusammenfassung:This study described the karyotype of Geophagus cf. proximus. Specimens were collected in Água Preta Lake, Parque Ambiental de Belém, Pará State, Brazil. The karyotype were 2n = 48 chromosomes (FN = 60: 12M/SM+36ST/A) and no sexual chromosome differentiation. C-banding showed centromeric staining in all chromosomes. The first chromosome pair, besides centromeric coloration, presented a totally heterochromatic long arm. The nucleolus organizer regions (NORs) were studied by means of AgNO3. NORs were located at the short arm of the second chromosome pair.  
ISSN:1679-9283
1807-863X
DOI:10.4025/actascibiolsci.v35i1.11711