Comparative cytogenetics of ten species of cichlid fishes (Teleostei, Cichlidae) from the Araguaia River system, Brazil, by conventional cytogenetic methods

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorFederal University of Mato Grosso-
Autor(es): dc.creatorValente, G. Targino-
Autor(es): dc.creatorVitorino, C. de Andrade-
Autor(es): dc.creatorCabral-de-Mello, D. C.-
Autor(es): dc.creatorOliveira, C.-
Autor(es): dc.creatorSouza, I. Lima-
Autor(es): dc.creatorMartins, C.-
Autor(es): dc.creatorVenere, P. C.-
Data de aceite: dc.date.accessioned2025-08-21T22:38:46Z-
Data de disponibilização: dc.date.available2025-08-21T22:38:46Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2012-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3897/CompCytogen.v6i2.1739-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226928-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226928-
Descrição: dc.descriptionCichlids represent one of the most species-rich families of fishes and have attracted the attention of evolutionary biologists due to the rapid radiation occurring in some groups and the importance of some species in the world aquaculture. Cytogenetic analysis was conducted in 10 cichlid species from the Araguaia River, Amazon Basin, Brazil. The chromosome number was 2n=48 for all analyzed species except for Laetacara araguaiae Ottoni et Costa, 2009 (2n=44). Chromosomal polymorphism was detected only in Geophagus proximus (Castelnau, 1855), which exhibits an extra large submetacentric and and a dot-like chromosomes. Moreover, the C-banding revealed a general pericentromeric heterochromatic pattern and some additional blocks for some species. The heterochromatic blocks corresponding to AgNOR bearing regions were observed in all species and also corresponded to CMA3 positive blocks, which were observed in terminal regions. Besides the general conserved chromosomal and heterochromatin patterns for South American cichlids, the presence of GC-rich heterochromatin was quite different in the species Biotodoma cupido (Heckel, 1840), Geophagus proximus, Retroculus lapidifer (Castelnau, 1855), Crenicichla strigata Günther, 1862 and Heros efasciatus Heckel, 1840. The results suggest that independent events of heterochromatin modification occurred during chromosome evolution in the group, regardless of the conservation of macro-chromosomal structure. © G. Targino Valente et al.-
Descrição: dc.descriptionLaboratory of Integrative Genomics Department of Morphology Institute of Biosciences UNESP-Sao Paulo State University, 18618-970 Botucatu, Sao Paulo-
Descrição: dc.descriptionLaboratory of Ichthyology Institute of Biological Sciences and Health Federal University of Mato Grosso, Campus of Araguaia, 78698-000, Pontal do Araguaia, Mato Grosso-
Descrição: dc.descriptionDepartment of Biology Institute of Biosciences UNESP-Sao Paulo State University, 13506-900, Rio Claro, Sao Paulo-
Descrição: dc.descriptionLaboratory of Biology and Fish Genetics Department of Morphology Institute of Biosciences UNESP-Sao Paulo State University, 18618-970, Botucatu, Sao Paulo-
Descrição: dc.descriptionLaboratory of Integrative Genomics Department of Morphology Institute of Biosciences UNESP-Sao Paulo State University, 18618-970 Botucatu, Sao Paulo-
Descrição: dc.descriptionDepartment of Biology Institute of Biosciences UNESP-Sao Paulo State University, 13506-900, Rio Claro, Sao Paulo-
Descrição: dc.descriptionLaboratory of Biology and Fish Genetics Department of Morphology Institute of Biosciences UNESP-Sao Paulo State University, 18618-970, Botucatu, Sao Paulo-
Formato: dc.format163-181-
Idioma: dc.languageen-
Relação: dc.relationComparative Cytogenetics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectChromosome evolution-
Palavras-chave: dc.subjectCichlidae-
Palavras-chave: dc.subjectFish chromosomes-
Palavras-chave: dc.subjectGenome-
Título: dc.titleComparative cytogenetics of ten species of cichlid fishes (Teleostei, Cichlidae) from the Araguaia River system, Brazil, by conventional cytogenetic methods-
Tipo de arquivo: dc.typelivro digital-
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