Data/hora: 01/06/2024 19:07:22

Provedor de dados: | Revista Brasileira de Zoologia
País: | Brazil
Título: | A new karyotype of Wiedomys pyrrhorhinus (Rodentia: Sigmodontinae) from Chapada Diamantina, northeastern Brazil
Autores: | Souza,Ana L. G; Corrêa,Margaret M. de O; Aguilar,Cecília T. de; Pessôa,Leila M.
Data: | 2011-02-01
Ano: | 2011
Palavras-chave: | Ag-NOR sites; Caatinga; C-banding; G-banding; Red- nosed mouse.
Resumo: | A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina, state of Bahia. Karyological studies of W. pyrrhorhinus have shown a constant diploid number (2n) of 62 with two different numbers of autosomal arms (FNa): 86 and 90, respectively. The new karyotype revealed 2n = 62 and FNa = 104, being the higher autosomal number found so far for this genus. The X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. The analysis of the karyotype morphology suggests that this new karyotype is more closely related to the previous karyotype with 2n = 62 and FNa = 90, described from Caetité, Bahia State. Further studies, comparing different populations of W. pyrrhorhinus, including molecular approaches, may help to better understand the geographical limits of each population and their phylogenetic relationships in the Caatinga biome
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100013
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-46702011000100013
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.28 n.1 2011
Fonte: | info:eu-repo/semantics/openAccess