Data/hora: 16/06/2024 20:02:48

Provedor de dados: | 74
País: | Brazil
Título: | Karyotype diversity between species of Crenicichla (Perciformes, Cichlidae) from different Brazilian hydrographic basins
Autores: | Pires,Larissa Bettin; Usso,Mariana Campaner; Giuliano-Caetano,Lucia; Dias,Ana Lúcia.
Data: | 2019-06-01
Ano: | 2019
Palavras-chave: | Chromosome banding; Fish cytogenetics; Geophaginae; Ribosomal DNA.
Resumo: | Abstract Crenicichla is the largest genus in the Cichlidae family in South America. The genus includes 100 valid species that are popularly known in Brazil as jacundás or joaninhas and are widely distributed in rivers east of the Andes. Cytogenetic analyses were carried out on seven species in this genus. All species showed a diploid number of 48 with interspecific differences in karyotype formulas and AgNORs located in interstitial position on the short arm of the largest metacentric pair, except for the two populations from C. britskii. Population A showed terminal markings on the long arm of the fifth pair of the complement, and population B showed up to two marked chromosome pairs. FISH with an 18S rDNA probe was coincident with AgNORs and CMA3, except for pair 6 from population B of C. britskii that did not presented positive CMA3 sites. This work presents first cytogenetic data for C. haroldoi, C. maculata, and C. punctata, and the results show karyotypic patterns similar to those in the literature. However, the diversity found in populations of C. britskii represents new information about the evolution of the karyotype of the Cichlidae family, which has been conservative. Furthermore, the data could assist in phylogenetic studies of Crenicichla.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000300357
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/1678-4685-gmb-2018-0052
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.42 n.2 2019
Fonte: | info:eu-repo/semantics/openAccess