| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Comparative cytogenetics of Carnegiella marthae and Carnegiella strigata (Characiformes, Gasteropelecidae) and description of a ZZ/ZW sex chromosome system
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| Autores: |
Terencio,Maria Leandra
Schneider,Carlos Henrique
Gross,Maria Claudia
Silva,Adailton Moreira da
Feldberg,Eliana
Porto,Jorge Ivan Rebelo
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| Data: |
2008-01-01
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| Ano: |
2008
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| Palavras-chave: |
Fish cytogenetics
Karyotype differentiation
NOR phenotypes
Heteromorphic sex chromosome system
Cytotaxonomy
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200011
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572008000200011
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.31 n.1 suppl.0 2008
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| Direitos: |
info:eu-repo/semantics/openAccess
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