Data/hora: 09/06/2024 17:41:52

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Intra- and inter-individual chromosome variation in Hoplerythrinus unitaeniatus (Pisces, Erythrinidae): a population from the Brazilian São Francisco river basin	
Autores: 	Diniz,Débora; Bertollo,Luiz A.C.	
Data: 	2006-01-01	
Ano: 	2006	
Palavras-chave: 	Karyotypes; C-banding; Nucleolar organizing regions; Intra- and inter-individual polymorphism.	
Resumo: 	Chromosomal studies were carried out on a population of the fish Hoplerythrinus unitaeniatus (jeju) from Prata river in the São Francisco river basin, Minas Gerais, Brazil using conventional Giemsa staining, C-banding, silver nitrate nucleolar organizer region (Ag-NOR) staining and fluorescent in situ hybridization (FISH) with 18S and 5S rDNA probes. We found a high degree of inter- and intra-individual variability with the identification of 2n = 50, 2n = 51 and 2n = 52 karyotypes at nearly the same frequency within the population. Intra-individual variation in chromosomal morphology and, consequently, karyotype formulae was also observed, chiefly in the specimens with 2n = 50 and 2n = 52 chromosomes. Ag-NORs and 18S rDNA sites also showed numerical and chromosomal variation similar to that found for the 5S rDNA sites. Some putative hypotheses are considered in order to explain these results.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300009	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572006000300009	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.29 n.3 2006	
Fonte: 	info:eu-repo/semantics/openAccess