Natural triploidy in Astyanax scabripinnis (Pisces, Characidae) and simultaneous occurrence of macro B-chromosomes
Nenhuma Miniatura disponível
Data
1994-01-01
Autores
Maistro, E. Luis [UNESP]
Lúcia Dias, A. [UNESP]
Foresti, F. [UNESP]
Oliveira, C. [UNESP]
Filho, O. Moreira [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The occurrence of natural triploidy in two specimens of Astyanax scabripinnis collected in the Araquá river and in the Córrego das Pedras stream, respectively, is noticed. The triploid specimen from the Araquá river presented one macro B-chromosome and the triploid specimen from Córrego das Pedras stream presented two macro B-chromosomes. The C-banding performed in the specimen from the Araquá river confirmed the triploidy and showed that the macro B-chromosome was entirely heterochromatic. Ag-NOR characterization showed two chromosomes involved in the nucleolar activity in both specimens. Some aspects related to the origin of triploid fishes are described. © 1994 Taylor & Francis Group, LLC.
Descrição
Palavras-chave
Astyanax scabripinnis, B-chromosomes, C-banding, Fish cytogenetics, Natural triploidy
Como citar
Caryologia, v. 47, n. 3-4, p. 233-239, 1994.