Karyotype Conservation in 2 Populations of the Parthenogenetic Scorpion Tityus serrulatus (Buthidae): rDNA and Its Associated Heterochromatin Are Concentrated on Only One Chromosome

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dc.contributor.authorSchneider, Marielle C. [UNIFESP]
dc.contributor.authorCella, Doralice M.
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2016-01-24T13:59:49Z
dc.date.available2016-01-24T13:59:49Z
dc.date.issued2010-07-01
dc.description.abstractWithin the order Scorpiones, the parthenogenetic mode of reproduction has been described for 11 species, 6 of which belong to the genus Tityus. in this work, an investigation of the chromosome characteristics of 2 populations of Tityus serrulatus, the first scorpion species known to be thelytokously parthenogenetic, is described. An analysis of 40 individuals revealed holocentric chromosomes of large, medium, and small sizes and an invariable diploid number of 2n = 12. in addition to the conserved macrokaryotype structure, specific chromosome regions also appeared unchanged within and between the samples studied; that is, each sample displayed only one chromosome carrier of the active nucleolar organizer region containing ribosomal genes (5.8S, 18S, and 28S) and AT-rich heterochromatin associated with the ribosomal DNA. the high conservation of the chromosomal features observed in T. serrulatus differed from that verified in certain species of other groups of animals that possess both holocentric chromosomes and parthenogenetic reproduction. Moreover, the cytogenetic results obtained herein permit us to suggest how the eggs of T. serrulatus develop, whether by apomixis or automixis.en
dc.description.affiliationUniversidade Federal de São Paulo, Dept Ciencias Biol, BR-09972270 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Biol, São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Ciencias Biol, BR-09972270 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipIDFAPESP: 06/53275-3
dc.format.extent491-496
dc.identifierhttp://dx.doi.org/10.1093/jhered/esq004
dc.identifier.citationJournal of Heredity. Cary: Oxford Univ Press Inc, v. 101, n. 4, p. 491-496, 2010.
dc.identifier.doi10.1093/jhered/esq004
dc.identifier.issn0022-1503
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/32642
dc.identifier.wosWOS:000279430300010
dc.language.isoeng
dc.publisherOxford Univ Press Inc
dc.relation.ispartofJournal of Heredity
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.licensehttp://www.oxfordjournals.org/access_purchase/self-archiving_policyb.html
dc.subjectchromosome numberen
dc.subjectcytogeneticen
dc.subjectevolutionen
dc.subjectholocentric chromosomesen
dc.subjectmacrokaryotype structureen
dc.subjectnucleolar organizeren
dc.titleKaryotype Conservation in 2 Populations of the Parthenogenetic Scorpion Tityus serrulatus (Buthidae): rDNA and Its Associated Heterochromatin Are Concentrated on Only One Chromosomeen
dc.typeinfo:eu-repo/semantics/article
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