Data/hora: 09/06/2024 03:51:06

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Supernumerary chromosomes in the pufferfish Sphoeroides spengleri: first occurrence in marine Teleostean Tetraodontiformes fish	
Autores: 	Alves,Anderson Luis; Porto-Foresti,Fábio; Oliveira,Claudio; Foresti,Fausto.	
Data: 	2008-01-01	
Ano: 	2008	
Palavras-chave: 	B chromosome; Pufferfish; Sphoeroides spengleri.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200014	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572008000200014	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.31 n.1 suppl.0 2008	
Fonte: 	info:eu-repo/semantics/openAccess