High chromosome variability and the presence of multivalent associations in buthid scorpions

Registro completo de metadados
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorMattos, Viviane Fagundes-
Autor(es): dc.creatorCella, Doralice Maria-
Autor(es): dc.creatorCarvalho, Leonardo Sousa-
Autor(es): dc.creatorCandido, Denise Maria-
Autor(es): dc.creatorSchneider, Marielle Cristina-
Data de aceite: dc.date.accessioned2021-03-10T19:52:47Z-
Data de disponibilização: dc.date.available2021-03-10T19:52:47Z-
Data de envio: dc.date.issued2014-05-27-
Data de envio: dc.date.issued2014-05-27-
Data de envio: dc.date.issued2013-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s10577-013-9342-3-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/74903-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/74903-
Descrição: dc.descriptionIn this study, we investigated the mitotic and meiotic chromosomes of 11 Buthidae scorpion species, belonging to three genera (Ananteris, Rhopalurus and Tityus), to obtain detailed knowledge regarding the mechanisms underlying the intraspecific and/or interspecific diversity of chromosome number and the origin of the complex chromosome associations observed during meiosis. The chromosomes of all species did not exhibit a localised centromere region and presented synaptic and achiasmatic behaviour during meiosis I. Spermatogonial and/or oogonial metaphase cells of these buthids showed diploid numbers range from 2n = 6 to 2n = 28. In most species, multivalent chromosome associations were observed in pachytene and postpachytene nuclei. Moreover, intraspecific variability associated with the presence or absence of chromosome chains and the number of chromosomes in the complex meiotic configurations was observed in some species of these three genera. Silver-impregnated cells revealed that the number and location of nucleolar organiser regions (NORs) remained unchanged despite extensive chromosome variation; notably, two NORs located on the terminal or subterminal chromosome regions were commonly observed for all species. C-banded and fluorochrome-stained cells showed that species with conspicuous blocks of heterochromatin exhibited the lowest rate of chromosomal rearrangement. Based on the investigation of mitotic and meiotic cells, we determined that the intraspecific variability occurred as a consequence of fission/fusion-type chromosomal rearrangements in Ananteris and Tityus species and reciprocal translocation in Rhopalurus species. Furthermore, we verified that individuals presenting the same diploid number differ in structural chromosome organisation, giving rise to intraspecific differences of chromosome association in meiotic cells (bivalent-like elements or chromosome chains). © 2013 Springer Science+Business Media Dordrecht.-
Formato: dc.format121-136-
Idioma: dc.languageen-
Relação: dc.relationChromosome Research-
Relação: dc.relation2.909-
Relação: dc.relation1,425-
Relação: dc.relation1,425-
Direitos: dc.rightsclosedAccess-
Palavras-chave: dc.subjectchromosome rearrangements-
Palavras-chave: dc.subjectevolution-
Palavras-chave: dc.subjectheterozygosity-
Palavras-chave: dc.subjectholocentric-
Palavras-chave: dc.subjectmeiosis-
Palavras-chave: dc.subjectnucleolar organiser region-
Palavras-chave: dc.subjectAnanteris-
Palavras-chave: dc.subjectanimal cell-
Palavras-chave: dc.subjectcell nucleus-
Palavras-chave: dc.subjectcentromere-
Palavras-chave: dc.subjectchromosome-
Palavras-chave: dc.subjectchromosome NOR-
Palavras-chave: dc.subjectchromosome number-
Palavras-chave: dc.subjectcontrolled study-
Palavras-chave: dc.subjectdiploidy-
Palavras-chave: dc.subjectfemale-
Palavras-chave: dc.subjectgenetic variability-
Palavras-chave: dc.subjectheterochromatin-
Palavras-chave: dc.subjectmale-
Palavras-chave: dc.subjectmetaphase-
Palavras-chave: dc.subjectnonhuman-
Palavras-chave: dc.subjectpachytene-
Palavras-chave: dc.subjectpostpachytene-
Palavras-chave: dc.subjectpriority journal-
Palavras-chave: dc.subjectreciprocal chromosome translocation-
Palavras-chave: dc.subjectRhopalurus-
Palavras-chave: dc.subjectscorpion-
Palavras-chave: dc.subjectspecies diversity-
Palavras-chave: dc.subjectTityus-
Palavras-chave: dc.subjectButhida-
Palavras-chave: dc.subjectButhidae-
Palavras-chave: dc.subjectScorpiones-
Título: dc.titleHigh chromosome variability and the presence of multivalent associations in buthid scorpions-
Tipo de arquivo: dc.typelivro digital-
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