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Cytotaxonomy and karyoevolution of the genus Crenicichla (Perciformes, Cichlidae)
Benzaquem, Denise Corrêa; Feldberg, Eliana; Porto, Jorge Ivan Rebelo; Gross, Maria Claudia; Zuanon, Jansen Alfredo Sampaio.
Afiliación
  • Benzaquem, Denise Corrêa; Instituto Nacional de Pesquisas da Amazônia. Laboratório de Genética de Peixes. Manaus. BR
  • Feldberg, Eliana; Instituto Nacional de Pesquisas da Amazônia. Laboratório de Genética de Peixes. Manaus. BR
  • Porto, Jorge Ivan Rebelo; Instituto Nacional de Pesquisas da Amazônia. Laboratório de Genética de Peixes. Manaus. BR
  • Gross, Maria Claudia; Instituto Nacional de Pesquisas da Amazônia. Laboratório de Genética de Peixes. Manaus. BR
  • Zuanon, Jansen Alfredo Sampaio; Instituto Nacional de Pesquisas da Amazônia. Laboratório de Sistemática e Ecologia de Peixes. Manaus. BR
Genet. mol. biol ; 31(1,suppl): 250-255, 2008. ilus, tab
Article en En | LILACS | ID: lil-484618
Biblioteca responsable: BR26.1
ABSTRACT
Karyotypes of six cichlid species of the genus Crenicichla were investigated. The species C. cincta, C. inpa, C. reticulata, C. lugubris, and C. cf. johanna were collected from Amazon basin, and C. britskii was collected from the Paraná-Paraguai basin. All of the analysed species showed 2n = 48 chromosomes; however, C. cincta, C. lugubris, C. cf. johanna, and C. britskii had a karyotype formula of 8M-SM+40ST-A, FN = 56, while C. inpa and C. reticulata exhibited the formula 6M-SM+42ST-A, FN = 54. Analysis of active Ag-NORs revealed two NOR-bearing chromosomes in all species; however, theses cistrons were located on different chromosome pairs and/or in different chromosome locations in each species. This condition bears evolutionary significance, since it is the main chromosome marker of the process of karyotypic evolution among the species of the genus Crenicichla. In general, C-banding revealed a similar constitutive heterochromatin pattern in all species, although it was possible to detect some features that led us to infer that Crenicichla also presents a species-specific heterochromatin pattern.
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Texto completo: 1 Colección: 01-internacional Base de datos: LILACS Asunto principal: Bandeo Cromosómico / Peces / Región Organizadora del Nucléolo Límite: Animals Idioma: En Revista: Genet. mol. biol Asunto de la revista: GENETICA Año: 2008 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Brasil
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: LILACS Asunto principal: Bandeo Cromosómico / Peces / Región Organizadora del Nucléolo Límite: Animals Idioma: En Revista: Genet. mol. biol Asunto de la revista: GENETICA Año: 2008 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Brasil