Data/hora: 16/06/2024 17:27:49

Provedor de dados: | Genetics and Molecular Biology
País: | Brazil
Título: | Comparative cytogenetics of Carnegiella marthae and Carnegiella strigata (Characiformes, Gasteropelecidae) and description of a ZZ/ZW sex chromosome system
Autores: | Terencio,Maria Leandra; Schneider,Carlos Henrique; Gross,Maria Claudia; Silva,Adailton Moreira da; Feldberg,Eliana; Porto,Jorge Ivan Rebelo.
Data: | 2008-01-01
Ano: | 2008
Palavras-chave: | Fish cytogenetics; Karyotype differentiation; NOR phenotypes; Heteromorphic sex chromosome system; Cytotaxonomy.
Resumo: | Comparative cytogenetic analyses of hatchetfishes Carnegiella marthae and Carnegiella strigata (Gasteropelecidae) from the Rio Negro basin were performed using conventional Giemsa staining, silver (Ag) -staining and C-banding. The diploid chromosome numbers of both species equaled 2n = 50 but their karyotypes were distinct. We found evidence for sex chromosomes in C. marthae since karyotype of males presented 20 M + 12 SM + 4 ST + 14 A and ZZ ST chromosomes while the females presented 20 M + 12 SM + 4 ST + 14 A and ZW ST chromosomes of distinct size. Conversely, C. strigata presented 4 M + 4 SM + 2 ST + 40 A chromosomes without sex chromosome heteromorphism. Karyotypes of both species had two NOR-bearing SM chromosomes of distinct size indicating the presence of multiple NOR phenotypes. The sex chromosome pair had specific C-banding pattern allowing identification of both Z and W. This heteromorphic system has previously been described for the gasteropelecids.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200011
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572008000200011
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.31 n.1 suppl.0 2008
Fonte: | info:eu-repo/semantics/openAccess