Comparative Cytogenetic Analysis of the Genus Symphysodon (Discus Fishes, Cichlidae): Chromosomal Characteristics of Retrotransposons and Minor Ribosomal DNA

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dc.contributor.authorGross, M. C.
dc.contributor.authorSchneider, C. H.
dc.contributor.authorValente, G. T. [UNESP]
dc.contributor.authorPorto, J. I. R.
dc.contributor.authorMartins, C. [UNESP]
dc.contributor.authorFeldberg, E.
dc.contributor.institutionUniversidade Federal do Amazonas (UFAM)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:52:16Z
dc.date.available2014-05-20T13:52:16Z
dc.date.issued2009-01-01
dc.description.abstractAs part of a genetic screening program for wild Discus fishes, we analyzed karyotypes and cytogenetic characteristics of Symphysodon aequifasciatus, S. discus and S. haraldi using C-banding and fluorescent in situ hybridization ( FISH) with the Rex3 retrotransposon and 5S rDNA probes in mitotic and meiotic chromosomes. In the 3 species, diploid chromosome number was 2n = 60 and karyotypes contained predominantly meta-submetacentric chromosomes. C-banding showed blocks of constitutive heterochromatin mainly in the pericentromeric region. Physical mapping of repetitive 5S rDNA sequences and Rex3 retrotransposons in mitotic and meiotic chromosomes showed partial colocalization of constitutive heterochromatin and repetitive elements. Correlations among the accumulation of repetitive elements, heterochromatinization and chromosome rearrangements have been hypothesized to explain the karyo-type differentiation in the Symphysodon genus. The role of repetitive elements in adaptation to highly diverse habitats, as well as in the generation of the phenotypic and genetic variability found in wild Discus populations, needs to be further investigated. Copyright (C) 2010 S. Karger AG, Baselen
dc.description.affiliationUniv Fed Amazonas, Dept Biol, Lab Genet Anim, Inst Ciencias Biol, BR-69077000 Manaus, Amazonas, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Morfol, Lab Genom Integrat, Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Morfol, Lab Genom Integrat, Botucatu, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipNational Amazon Research Institute/Genetic, Conservations and Evolutionary Biology (INPA/GCBEV)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Amazonas (FAPEAM)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 501119/2005-1
dc.description.sponsorshipIdFAPESP: 04/14766-6
dc.description.sponsorshipIdCNPq: 13/2006 554057/2006-9
dc.description.sponsorshipIdCNPq: 573976/2008-2
dc.format.extent43-53
dc.identifierhttp://dx.doi.org/10.1159/000279443
dc.identifier.citationCytogenetic and Genome Research. Basel: Karger, v. 127, n. 1, p. 43-53, 2009.
dc.identifier.doi10.1159/000279443
dc.identifier.issn1424-8581
dc.identifier.lattes8858800699425352
dc.identifier.orcid0000-0003-3534-974X
dc.identifier.urihttp://hdl.handle.net/11449/18675
dc.identifier.wosWOS:000275679900008
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.subjectFluorescent in situ hybridizationen
dc.subjectHeterochromatinen
dc.subjectMeiosisen
dc.subjectMitosisen
dc.subject5S rDNAen
dc.subjectRex3en
dc.titleComparative Cytogenetic Analysis of the Genus Symphysodon (Discus Fishes, Cichlidae): Chromosomal Characteristics of Retrotransposons and Minor Ribosomal DNAen
dc.typeArtigo
dcterms.licensehttp://www.karger.com/Services/RightsPermissions
dcterms.rightsHolderKarger
unesp.author.lattes8858800699425352[5]
unesp.author.orcid0000-0003-1393-6492[4]
unesp.author.orcid0000-0003-0761-4112[2]
unesp.author.orcid0000-0001-5355-3424[3]
unesp.author.orcid0000-0003-3534-974X[5]
unesp.author.orcid0000-0003-1161-238X[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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