Consulta: creatorFacets:"Marques,Diego Ferreira"
Registros recuperados: 2
Data/hora: 11/06/2024 02:23:26

Cytogenetic variation of repetitive DNA elements in Hoplias malabaricus (Characiformes - Erythrinidae) from white, black and clear water rivers of the Amazon basin
Provedor de dados: 74
Autores: Santos,Fabíola Araújo dos; Marques,Diego Ferreira; Terencio,Maria Leandra; Feldberg,Eliana; Rodrigues,Luís Reginaldo R.
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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytogenomics; FISH; RDNA; REX 3; Tapajós river.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100040

Cytogenetic and DNA barcoding reveals high divergence within the trahira, Hoplias malabaricus (Characiformes: Erythrinidae) from the lower Amazon River
Provedor de dados: 83
Autores: Marques,Diego Ferreira; Santos,Fabíola Araújo dos; Silva,Simoni Santos da; Sampaio,Iracilda; Rodrigues,Luís Reginaldo Ribeiro.
Molecular and cytogenetic data have provided evidence of cryptic speciation in the widespread South American trahira, Hoplias malabaricus. In the present study, karyotypes and DNA barcode sequences of specimens from seven populations inhabiting the lower Amazon River were analyzed in order to characterize the levels of genetic divergence within a single karyomorph. All the specimens presented karyotypes with 2n = 40 chromosomes (20m+20sm) that were consistent with the species' C karyomorph. The DNA barcodes revealed six haplogroups, with clear divergence between populations from Brazil and Argentina. The results support the species complex hypothesis and indicate that a single karyomorph of H. malabaricus may harbor more than one species
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon basin; COI; Karyomorph; Species complex; Trahiras.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200459