Occurrence of structural polymorphism and supernumerary chromosomes in a population of Parodon nasus (Parodontidae)

dc.contributor.authorPaula, Angélica Alves de
dc.contributor.authorPenha, Helen Alves [UNESP]
dc.contributor.authorDelai, Vitor Antonio
dc.contributor.authorGiuliano-Caetano, Lucia
dc.contributor.authorDias, Ana Lúcia
dc.contributor.institutionUniversidade Estadual de Londrina (UEL)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:12:04Z
dc.date.available2018-12-11T17:12:04Z
dc.date.issued2017-07-03
dc.description.abstractThe family Parodontidae is a small group of fish that has distinct morphological differences. Despite its conserved diploid number, structural cytogenetic polymorphisms involving sex chromosomes are commonly described in this group. Conversely, reports on numerical polymorphisms owing to the occurrence of supernumerary chromosomes are rare. To better understand the karyotype evolution of this group, we analyzed specimens of Parodon nasus collected in the Três Bocas/PR stream, applying different cytogenetic techniques. All individuals presented 54 meta-submetacentric chromosomes, except for three females, which exhibited structural polymorphism. The NOR occurred on a pair of submetacentric chromosomes. Heterochromatin was distributed in some pericentromeric areas, predominating in the terminal regions. We detected B microchromosomes in four of the collected individuals, which were heterochromatic and bearers of 18S rDNA sites. This work deals with the first description of these chromosomes in the family Parodontidae. The results indicate that, despite the conserved diploid number, this group of fish presents a more divergent karyotypic evolution, involving chromosome rearrangements in its karyotypic structure.en
dc.description.affiliationDepartamento de Biologia Geral CCB Universidade Estadual de Londrina
dc.description.affiliationLaboratório de Bioquímica e Biologia Molecular UNESP/FCAV
dc.description.affiliationUnespLaboratório de Bioquímica e Biologia Molecular UNESP/FCAV
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 507681/2010-0
dc.format.extent200-205
dc.identifierhttp://dx.doi.org/10.1080/00087114.2017.1318503
dc.identifier.citationCaryologia, v. 70, n. 3, p. 200-205, 2017.
dc.identifier.doi10.1080/00087114.2017.1318503
dc.identifier.file2-s2.0-85019594514.pdf
dc.identifier.issn2165-5391
dc.identifier.issn0008-7114
dc.identifier.scopus2-s2.0-85019594514
dc.identifier.urihttp://hdl.handle.net/11449/174607
dc.language.isoeng
dc.relation.ispartofCaryologia
dc.relation.ispartofsjr0,281
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subject18S rDNA
dc.subjectB chromosomes
dc.subjectheterochromatin
dc.subjectkaryotype variation
dc.titleOccurrence of structural polymorphism and supernumerary chromosomes in a population of Parodon nasus (Parodontidae)en
dc.typeArtigo
unesp.author.orcid0000-0002-8676-2852[4]

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