Cytogenetic characterization of the strongly electric Amazonian eel, Electrophorus electricus (Teleostei, Gymnotiformes), from the Brazilian rivers Amazon and Araguaia
Genet. mol. biol
;
31(1,suppl): 227-230, 2008. ilus
Artículo
en Inglés
| LILACS
| ID: lil-484590
ABSTRACT
A karyotype analysis of the electric eel, Electrophorus electricus (Teleostei, Gymnotiformes), a strongly electric fish from northern South America, is presented. Two female specimens were analyzed, one from the Amazon River and one from the Araguaia River. The specimens had a chromosomal number of 2n = 52 (42M-SM + 10A). C-bands were present in a centromeric and pericentromeric position on part of the chromosomes; some interstitial C-bands were also present. Heteromorphic nucleolus organizer regions (NORs) were detected in two chromosome pairs of the specimen from the Amazon River. The chromosome number and karyotype characteristics are similar to those of other Gymnotidae species. The genera Electrophorus and Gymnotus are positioned as the basal lineages in the Gymnotiformes phylogeny.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Electrophorus
/
Órgano Eléctrico
/
Región Organizadora del Nucléolo
Límite:
Animales
País/Región como asunto:
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
Genet. mol. biol
Asunto de la revista:
Genética
Año:
2008
Tipo del documento:
Artículo
/
Documento de proyecto
País de afiliación:
Brasil
Institución/País de afiliación:
Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis/BR
/
Universidade Estadual Paulista/BR
/
Universidade de São Paulo/BR
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