Cytogenetic Mapping of the Retroelements Rex1, Rex3 and Rex6 among Cichlid Fish: New Insights on the Chromosomal Distribution of Transposable Elements

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dc.contributor.authorValente, G. T. [UNESP]
dc.contributor.authorMazzuchelli, J. [UNESP]
dc.contributor.authorFerreira, I. A. [UNESP]
dc.contributor.authorPoletto, A. B. [UNESP]
dc.contributor.authorFantinatti, B. E. A. [UNESP]
dc.contributor.authorMartins, C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:52:14Z
dc.date.available2014-05-20T13:52:14Z
dc.date.issued2011-01-01
dc.description.abstractTo enhance our understanding of the organization of the genome and chromosome evolution of cichlid fish species, we have isolated and physically mapped onto the chromosomes the transposable elements (TEs) Rex1, Rex3 and Rex6, which are conserved in teleost fish, in the chromosomes of African and South American cichlid species. The physical mapping of different Rex elements showed that they are primarily compartmentalized in the pericentromeric heterochromatic regions, although dispersed or clustered signals in euchromatic regions were also observed. The presence of TEs in heterochromatin can be correlated with their role in the structure and organization of heterochromatic areas (such as centromeres) or with the lower selective pressure that act on these gene-poor regions. The Rex elements were also concentrated in the largest chromosome pair of the Nile tilapia, Oreochromis niloticus. This chromosome pair is supposed to have originated by fusions, demonstrating the possible involvement of TEs with chromosome rearrangements. Besides general patterns of chromosomal distribution, comparative analysis suggests that Rex elements could differ in their chromosomal distribution among different fish groups or species and that intrinsic aspects of the genomes could influence the spread, accumulation or elimination of TEs. Copyright (C) 2010 S. Karger AG, Baselen
dc.description.affiliationUniv Estadual Paulista UNESP, Dept Morfol, Inst Biociencias, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista UNESP, Dept Morfol, Inst Biociencias, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent34-42
dc.identifierhttp://dx.doi.org/10.1159/000322888
dc.identifier.citationCytogenetic and Genome Research. Basel: Karger, v. 133, n. 1, p. 34-42, 2011.
dc.identifier.doi10.1159/000322888
dc.identifier.issn1424-8581
dc.identifier.lattes8858800699425352
dc.identifier.orcid0000-0003-3534-974X
dc.identifier.urihttp://hdl.handle.net/11449/18668
dc.identifier.wosWOS:000288902800005
dc.language.isoeng
dc.publisherKarger
dc.relation.ispartofCytogenetic and Genome Research
dc.relation.ispartofjcr1.587
dc.relation.ispartofsjr0,748
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectChromosome evolutionen
dc.subjectGenome evolutionen
dc.subjectTransposable elementsen
dc.titleCytogenetic Mapping of the Retroelements Rex1, Rex3 and Rex6 among Cichlid Fish: New Insights on the Chromosomal Distribution of Transposable Elementsen
dc.typeArtigo
dcterms.licensehttp://www.karger.com/Services/RightsPermissions
dcterms.rightsHolderKarger
unesp.author.lattes8858800699425352[6]
unesp.author.orcid0000-0001-5355-3424[1]
unesp.author.orcid0000-0003-3534-974X[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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