Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/2399
Título: Comparative cytogenetics of Carnegiella marthae and Carnegiella strigata (Characiformes, Gasteropelecidae) and description of a ZZ/ZW sex chromosome system
Autor(es): Maria Leandra Terencio
Carlos Henrique Schneider
Gross, Maria Claudia
Silva, Adailton Moreira da
Eliana Feldberg
Jorge Ivan Rebelo Porto
Assunto: Cromossomos
Amazônia
Peixe ornamental
ISSN: 1415-4757
Revista: Genetics and Molecular Biology
Volume: 31
Resumo: Comparative cytogenetic analyses of hatchetfishes Carnegiella marthae and Camegiella 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 SIM + 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.
URI: http://repositorio.inpa.gov.br/handle/123/2399
ISSN: 1415-4757
DOI: https://dx.doi.org/10.1590/S1415-47572008000200011
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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