Data/hora: 09/06/2024 18:20:56

Provedor de dados: | 74
País: | Brazil
Título: | Chromosomal diversity in three species of electric fish (Apteronotidae, Gymnotiformes) from the Amazon Basin
Autores: | Silva,Fernando Henrique Ramos; Pieczarka,Julio Cesar; Cardoso,Adauto Lima; Silva,Patrícia Corrêa da; Oliveira,Jonas Alves de; Nagamachi,Cleusa Yoshiko.
Data: | 2014-12-01
Ano: | 2014
Palavras-chave: | Fluorochromes; FISH; Chromosomal rearrangements; Biodiversity.
Resumo: | Cytogenetic studies were carried out on samples of Parapteronotus hasemani, Sternarchogiton preto and Sternarchorhamphus muelleri (Apteronotidae, Gymnotiformes) from the Amazon basin. The first two species exhibited both a 2n = 52 karyotype, but differed in their karyotypic formulae, distribution of constitutive heterochromatin, and chromosomal location of the NOR. The third species, Sternarchorhamphus muelleri, was found to have a 2n = 32 karyotype. In all three species the DAPI and chromomycin A3 staining results were consistent with the C-banding results and nucleolar organizer region (NOR) localization. The 18S rDNA probe confirmed that there was only one pair of ribosomal DNA cistron bearers per species. The telomeric probe did not reveal interstitial telomeric sequences (ITS). The karyotypic differences among these species can be used for taxonomic identification. These data will be useful in future studies of these fishes and help understanding the phylogenetic relationships and chromosomal evolution of the Apteronotidae.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500006
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572014005000018
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.37 n.4 2014
Fonte: | info:eu-repo/semantics/openAccess