Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/37931
Type: Artigo de periódico
Title: Supernumerary chromosomes in the pufferfish Sphoeroides spengleri: first occurrence in marine Teleostean Tetraodontiformes fish
Author: Alves, Anderson Luis
Porto-Foresti, Fábio
Oliveira, Claudio
Foresti, Fausto
Abstract: 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.
Subject: B chromosome
pufferfish
Sphoeroides spengleri
Editor: Sociedade Brasileira de Genética
Rights: aberto
Identifier DOI: 10.1590/S1415-47572008000200014
Address: http://dx.doi.org/10.1590/S1415-47572008000200014
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200014
Date Issue: 1-Jan-2008
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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