Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/14957
Title: Cytotaxonomy and karyoevolution of the genus Crenicichla (Perciformes, Cichlidae)
Authors: Benzequem, Denise Corrêa
Feldberg, Eliana
Porto, Jorge Ivan Rebelo
Gross, Maria Claudia
Zuanon, Jansen
Keywords: C Banding
Chromosomal Localization
Chromosome Analysis
Chromosome Marker
Chromosome Nor
Chromosome Pairing
Cichlid
Cistron
Constitutive Heterochromatin
Controlled Study
Crenicichla
Crenicichla Britskii
Crenicichla Cincta
Crenicichla Inpa
Crenicichla Johanna
Crenicichla Lugubris
Crenicichla Reticulata
Cytotaxonomy
Female
Fish Genetics
Karyotype
Male
Evolution, Molecular
Nonhuman
Perciformes
River
Species Comparison
Species Difference
Cichlidae
Crenicara
Crenicichla
Crenicichla Lugubris
Perciformes
Issue Date: 2008
metadata.dc.publisher.journal: Genetics and Molecular Biology
metadata.dc.relation.ispartof: Volume 31, Número 1 SUPPL. 1, Pags. 250-255
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. Copyright © 2008, Sociedade Brasileira de Genética.
URI: https://repositorio.inpa.gov.br/handle/1/14957
metadata.dc.identifier.doi: 10.1590/S1415-47572008000200016
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