Data/hora: 02/06/2024 02:08:23

Provedor de dados: 	Genetics and Molecular Biology	
País: 	Brazil	
Título: 	Astyanax hastatus Myers, 1928 (Teleostei, Characidae): a new species complex within the genus Astyanax?	
Autores: 	Kavalco,Karine Frehner; Brandão,Karina de Oliveira; Pazza,Rubens; Almeida-Toledo,Lurdes Foresti de.	
Data: 	2009-01-01	
Ano: 	2009	
Palavras-chave: 	Astyanax hastatus; Molecular cytogenetics; Karyotypic evolution; Species complex.	
Resumo: 	Four populations of Astyanax hastatus Myers 1928 from the Guapimirim River basin (Rio de Janeiro State) were analyzed and three distinct cytotypes identified. These cytotypes presented 2n = 50 chromosomes, with 4M+8SM+10ST+28A (Cytotype A), 8M+10SM+14ST+18A (Cytotype B), 6M+8SM+4ST+32A (Cytotype C) and scanty heterochromatin, mainly located throughout pericentromeric regions of several chromosomal pairs. No homologies with the As-51 satellite DNA were observed in the three cytotypes, although all of them presented multiple 18S rDNA sites, as detected by both silver nitrate staining and FISH (fluorescent in situ hybridization). The application of the term "species complex" in Astyanax is discussed from a cytotaxonomic viewpoint.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300009	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572009005000055	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.32 n.3 2009	
Fonte: 	info:eu-repo/semantics/openAccess