Data/hora: 02/06/2024 13:09:36

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Cytogenetic variation of repetitive DNA elements in Hoplias malabaricus (Characiformes - Erythrinidae) from white, black and clear water rivers of the Amazon basin	
Autores: 	Santos,Fabíola Araújo dos; Marques,Diego Ferreira; Terencio,Maria Leandra; Feldberg,Eliana; Rodrigues,Luís Reginaldo R.	
Data: 	2016-03-01	
Ano: 	2016	
Palavras-chave: 	Cytogenomics; FISH; RDNA; REX 3; Tapajós river.	
Resumo: 	Abstract Hoplias malabaricus is a common fish species occurring in white, black and clear water rivers of the Amazon basin. Its large distribution across distinct aquatic environments can pose stressful conditions for dispersal and creates possibilities for the emergence of local adaptive profiles. We investigated the chromosomal localization of repetitive DNA markers (constitutive heterochromatin, rDNA and the transposable element REX-3) in populations from the Amazonas river (white water), the Negro river (black water) and the Tapajós river (clear water), in order to address the variation/association of cytogenomic features and environmental conditions. We found a conserved karyotypic macrostructure with a diploid number of 40 chromosomes (20 metacentrics + 20 submetacentrics) in all the samples. Heteromorphism in pair 14 was detected as evidence for the initial differentiation of an XX/XY system. Minor differences detected in the amount of repetitive DNA markers are interpreted as possible signatures of local adaptations to distinct aquatic environments.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100040	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/1678-4685-GMB-2015-0099	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.39 n.1 2016	
Fonte: 	info:eu-repo/semantics/openAccess