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Cytogenetics of four Omophoita species (Coleoptera, Chrysomelidae, Alticinae): A comparative analysis using mitotic and meiotic cells submitted to the standard staining and C-banding technique

dc.contributor.authorAlmeida, Mara Cristina
dc.contributor.authorCampaner, Carlos
dc.contributor.authorCella, Doralice Maria [UNESP]
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:55:42Z
dc.date.available2014-05-20T13:55:42Z
dc.date.issued2009-07-01
dc.description.abstractOmophoita belongs to the tribe Oedionychini and is endemic from Neotropical region. The species of the tribe Oedionychini have revealed certain singular chromosomal features, such as sex chromosomes with extremely large size, asynapsis, and synthetic or amphithelic orientation during meiosis. Additionally, some species also showed post-reductional segregation of the gigantic sex chromosomes in meiotic division. The purpose of this work was to characterize cytogenetically four Omophoita species (O. magniguttis, O. octoguttata, O. personata, and O. sexnotata) in relation to their diploid number, chromosomal morphology, type of sex chromosome system, and constitutive heterochromatin pattern in mitotic and meiotic cells, and compare the obtained data with those of related species to establish the mechanism involved in the chromosomal differentiation of these species during the evolutionary process. The diploid number, 2n = 22 = 20 + X + y, and meiotic formulae, 1 Oil + X + y, observed in these species were similar to those of the same genus and other species related. The autosomal morphology was acrocentric in O. magniguttis and O. octoguttata, metacentric in O. personata, and predominantly metacentric in O. sexnotata. In all these species, the sex chromosomes were metacentric. The secondary constriction occurred in pair 6 and X chromosome of O. personata, and in pair 6 and y chromosome of O. sexnotata. The constitutive heterochromatin was pericentromeric in O. magniguttis and centromeric in O. sexnotata, with the exception of the mitotic sex chromosomes of O. sexnotata, in which centromeric C band was lacking. Additional C bands in the sex chromosomes of O. magniguttis and certain autosomes and sex chromosomes of O. sexnotata were observed. Collochores were indirectly identified in the spermatocytes of O. octoguttata, O. personata, and O. sexnotata. The main mechanisms involved in the karyotype evolution of these species were discussed. (C) 2009 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniversidade Estadual de Ponta Grossa (UEPG), Setor Ciencias Biol & Saude, Dept Biol Estrutural Mol & Genet, BR-84030900 Ponta Grossa, Parana, Brazil
dc.description.affiliationUniv São Paulo, Museu Zool, BR-04299970 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Biol, BR-13506900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Biol, BR-13506900 São Paulo, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Paraná (FAADCT/PR)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFundação Araucaria: 051555/08
dc.description.sponsorshipIdCNPq: 476878/2007-1
dc.format.extent586-596
dc.identifierhttp://dx.doi.org/10.1016/j.micron.2009.02.011
dc.identifier.citationMicron. Oxford: Pergamon-Elsevier B.V. Ltd, v. 40, n. 5-6, p. 586-596, 2009.
dc.identifier.doi10.1016/j.micron.2009.02.011
dc.identifier.issn0968-4328
dc.identifier.urihttp://hdl.handle.net/11449/19948
dc.identifier.wosWOS:000267515800011
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofMicron
dc.relation.ispartofjcr1.728
dc.relation.ispartofsjr0,624
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCollochoresen
dc.subjectKaryotypeen
dc.subjectOedionychinaen
dc.subjectSecondary constrictionen
dc.subjectSex chromosomesen
dc.titleCytogenetics of four Omophoita species (Coleoptera, Chrysomelidae, Alticinae): A comparative analysis using mitotic and meiotic cells submitted to the standard staining and C-banding techniqueen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Rio Claropt
unesp.departmentBiologia - IBpt

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