Cytogenetic characterization of Eurysternus caribaeus (Coleoptera: Scarabaeidae): evidence of sex-autosome fusion and diploid number reduction prior to species dispersion

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dc.contributor.authorDe Arcanjo, Amanda Paulino
dc.contributor.authorCabral-de-Mello, Diogo Cavalcanti [UNESP]
dc.contributor.authorSilva, Ana Emilia Barros E.
dc.contributor.authorDe Moura, Rita de Cassia
dc.contributor.institutionUPE Univ Pernambuco
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Pernambuco (UFPE)
dc.date.accessioned2014-05-20T13:52:24Z
dc.date.available2014-05-20T13:52:24Z
dc.date.issued2009-08-01
dc.description.abstractMitotic and meiotic chromosomes of several populations of Eurysternus caribaeus (Coleoptera: Scarabaeidae) were analysed through conventional staining, C-banding, base-specific fluorochromes, silver nitrate staining and fluorescent in situ hybridization (FISH). All specimens showed 2n = 8 in their karyotypes, with a neo-XY sex system (Y is a submetacentric and X a metacentric) and three pairs of submetacentric autosomes. The analysis of constitutive heterochromatin (CH) revealed small blocks located in the centromeric region of all chromosomes which do not present positive staining under the fluorochromes CMA3 and DAPI. Silver nitrate staining revealed that the nucleolar organizer region (NORs) is associated with the sex chromosomes. The FISH technique revealed that rDNA sites in the X and Y are different in size. Data from different populations indicate that the diploid number reduction (2n = 8) observed in E. caribaeus is established and presumably has preceded the dispersion of this species. Moreover, this reduction occasioned the translocation of rDNA sites to the sex chromosomes, X and Y, an uncommon pattern in Scarabaeidae that was observed for the first time by the FISH in this work.en
dc.description.affiliationUPE Univ Pernambuco, Inst Ciencias Biol, Dept Biol, BR-50100130 Recife, PE, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Morfol, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUniversidade Federal de Pernambuco (UFPE), Ctr Ciencias Biol, Dept Bot, BR-50670420 Recife, PE, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Morfol, BR-18618000 Botucatu, SP, Brazil
dc.format.extent177-182
dc.identifierhttp://dx.doi.org/10.1007/s12041-009-0025-y
dc.identifier.citationJournal of Genetics. Bangalore: Indian Acad Sciences, v. 88, n. 2, p. 177-182, 2009.
dc.identifier.doi10.1007/s12041-009-0025-y
dc.identifier.fileWOS000269420700005.pdf
dc.identifier.issn0022-1333
dc.identifier.urihttp://hdl.handle.net/11449/18727
dc.identifier.wosWOS:000269420700005
dc.language.isoeng
dc.publisherIndian Acad Sciences
dc.relation.ispartofJournal of Genetics
dc.relation.ispartofjcr0.672
dc.relation.ispartofsjr0,357
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectchromosome rearrangementsen
dc.subjectFISHen
dc.subjectheterochromatinen
dc.subjectmeiosisen
dc.subjectNORsen
dc.titleCytogenetic characterization of Eurysternus caribaeus (Coleoptera: Scarabaeidae): evidence of sex-autosome fusion and diploid number reduction prior to species dispersionen
dc.typeArtigo
dcterms.licensehttp://www.ias.ac.in/resonance/Guide_PACT.pdf
dcterms.rightsHolderIndian Acad Sciences
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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Artigos - Morfologia - IBB