| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Supernumerary chromosomes in the pufferfish Sphoeroides spengleri: first occurrence in marine Teleostean Tetraodontiformes fish
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| Autores: |
Alves,Anderson Luis
Porto-Foresti,Fábio
Oliveira,Claudio
Foresti,Fausto
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| Data: |
2008-01-01
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| Ano: |
2008
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| Palavras-chave: |
B chromosome
Pufferfish
Sphoeroides spengleri
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| Resumo: |
Cytogenetic analyses carried out in eight specimens of Sphoeroides spengleri revealed the presence of 2n = 46 chromosomes (20 M/SM and 26 ST/A). Besides the standard karyotypical set, the presence of B microchromosomes was observed in two individuals, ranging from 0 to 2 microchromosomes per cell. A karyotype composed by 2n = 46 chromosomes with occurrence of M and SM chromosomes is considered basal for the species from the clade comprising the families Tetraodontidae, Balistidae, and Diodontidae, although it represents a derived condition for the order Tetraodontiformes, whose basal karyotype would be composed by 2n = 48 acrocentric chromosomes. The occurrence of B microchromosomes in marine Tetraodontiformes fish was not known, and this represents the first report of such a chromosomal type.
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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=S1415-47572008000200014
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572008000200014
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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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