Data/hora: 11/06/2024 11:22:04

Provedor de dados: | 83
País: | Brazil
Título: | First cytogenetic record for a species of Otothyropsis Ribeiro, Carvalho &amp;amp; Melo, 2005 (Loricariidae, Hypoptopomatinae)
Autores: | Fernandes,Carlos Alexandre; Bailly,Dayani; Sant'Ana,Débora Regina Almeida; Alves,Diandra Soares.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Ag-NOR; Chromosomal evolution; Freshwater fishes; Heterochromatin constitutive; Pericentric inversions.
Resumo: | ABTRACT Hypoptopomatinae is a monophyletic subfamily that includes 147 species, distributed in 20 genera. Otothyropsis is a genus of Hypoptopomatinae, recently described. Here, we provided the first cytogenetic information of Otothyropsis . The specimens were collected from córrego Dourado, a small tributary of rio Iguatemi, which flows into rio Paraná. The specimens of Otothyropsis cf. polyodon were analyzed with respect to diploid number, C-Band and Ag-NOR patterns. The diploid number was 54 chromosomes, distributed in 18 metacentric, 28 submetacentric, and 8 subtelocentric chromosomes, with single Ag-NOR and conspicuous heterochromatic blocks on the short and long arms of the 24th pair of chromosomes. Our study highlights the conservation trend of the diploid number (2n=54) and fundamental number (FN = 108) among the species of Hypoptopomatinae. However, the karyotype formula (18m+28sm+8st) seems to be specific to O. cf. polyodon , considering the other Hypoptopomatinae species already analyzed.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100224
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20150123
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.14 n.1 2016
Fonte: | info:eu-repo/semantics/openAccess