Cytogenetic analyses of Pseudopimelodus mangurus (Teleostei: Siluriformes: Pseudopimelodidae)
Carregando...
Fonte externa
Fonte externa
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso aberto
Fonte externa
Fonte externa
Resumo
The cytogenetic analyses showed that Pseudopimelodns mangurus has a diploid number of 2n=54 chromosomes (6M, 26SM, 12ST and 10A), single Ag-NORs on the short arm of a middle-sized ST pair, identified as pair 19, and a very small amount of C-band positive segments in two chromosome pairs. The Ag-NORs are C-band positive. The staining of the chromosomes of P. mangurus with CMA 3 reveled the occurrence of bright signals corresponding to the Ag-NORs segments, to the C-band positive segments and also to some C-band negative segments. The occurrence of a diploid number of 2n=54 in all species of the family Pseudopimelodidae and its absence among representatives of Pimelodidae and Heptapteridae, two related families previously considered, reinforces the hypothesis that Pseudopimelodidae is a monophyletic group. © 2004 The Japan Mendel Society.
Descrição
Palavras-chave
Ag-NORs, C-band, Chromomycin A3, Chromosomes, Karyotype, Pimelodidae, Pseudopimelodidae, Pseudopimelodus, Siluriformes, Teleostei
Idioma
Inglês
Citação
Cytologia, v. 69, n. 4, p. 419-424, 2004.
