Data/hora: 02/06/2024 05:11:22

Provedor de dados: | Genetics and Molecular Biology
País: | Brazil
Título: | Multiple interstitial ribosomal sites (NORs) in the Brazilian squirrel Sciurus aestuans ingrami (Rodentia, Sciuridae) with 2n = 40: an overview of Sciurus cytogenetics
Autores: | Fagundes,Valéria; Christoff,Alexandre Uarth; Amaro-Ghilard,Renata Cecília; Scheibler,Daniel R.; Yonenaga-Yassuda,Yatiyo.
Data: | 2003-01-01
Ano: | 2003
Palavras-chave: | Squirrels; Chromosomes; Karyotype; NORs; Rodentia.
Resumo: | This is the first time the karyotype of the Brazilian squirrel Sciurusaestuans ingrami, with 2n = 40, is described. The karyotype of this species comprises 18 pairs of biarmed and one minute pair of acrocentric autosomes, a medium-sized submetacentric X and a medium-sized acrocentric Y. Four pairs have an interstitial secondary constriction, co-located with nucleolar organizer regions (NORs), identified by silver-staining technique and fluorescent in situ hybridization (FISH) with ribosomal 18S/28S probes. The occurrence of multiple interstitial NORs is rare in rodents, and this is one of the few examples, identified by a molecular cytogenetics approach.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300007
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572003000300007
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.26 n.3 2003
Fonte: | info:eu-repo/semantics/openAccess