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dc.contributor.authorGross, Maria Claudia-
dc.contributor.authorFeldberg, Eliana-
dc.contributor.authorCella, Doralice Maria-
dc.contributor.authorSchneider, Marielle Cristina-
dc.contributor.authorSchneider, Carlos Henrique-
dc.contributor.authorPorto, Jorge Ivan Rebelo-
dc.contributor.authorMartins, Cesar Henrique Rossinoli-
dc.date.accessioned2020-06-03T19:27:19Z-
dc.date.available2020-06-03T19:27:19Z-
dc.date.issued2009-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/16309-
dc.description.abstractAs part of a program to understand the genetics of Amazonian ornamental fish, classical cytogenetics was used to analyze Symphysodon aequifasciatus, S. discus and S. haraldi, popular and expensive aquarium fishes that are endemic to the Amazon basin. Mitotic analyses in Symphysodon have shown some odd patterns compared with other Neotropical cichlids. We have confirmed that Symphysodon species are characterized by chromosomal diversity and meiotic complexity despite the fact that species share the same diploid number 2n=60. An intriguing meiotic chromosomal chain, with up to 20 elements during diplotene/diakinesis, was observed in S. aequifasciatus and S. haraldi, whereas S. discus only contains typical bivalent chromosomes. Such chromosomal chains with a high number of elements have not been observed in any other vertebrates. We showed that the meiotic chromosomal chain was not sex related. This observation is unusual and we propose that the origin of meiotic multiples in males and females is based on a series of translocations that involved heterochromatic regions after hybridization of ancestor wild Discus species. © 2009 Macmillan Publishers Limited. All rights reserved.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 102, Número 5, Pags. 435-441pt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectChromosomeen
dc.subjectCichliden
dc.subjectComplexityen
dc.subjectCytogeneticsen
dc.subjectEndemic Speciesen
dc.subjectKaryologyen
dc.subjectOrnamental Speciesen
dc.subjectTranslocationen
dc.subjectAnimalsen
dc.subjectBiological Modelen
dc.subjectChromosomeen
dc.subjectCichliden
dc.subjectFemaleen
dc.subjectGene Translocationen
dc.subjectGeneticsen
dc.subjectMaleen
dc.subjectMeiosisen
dc.subjectEvolution, Molecularen
dc.subjectVertebrateen
dc.subjectAnimalen
dc.subjectChromosomesen
dc.subjectCichlidsen
dc.subjectEvolution, Molecularen
dc.subjectFemaleen
dc.subjectMaleen
dc.subjectMeiosisen
dc.subjectModels, Geneticen
dc.subjectTranslocation, Geneticen
dc.subjectVertebratesen
dc.subjectAmazon Basinen
dc.subjectSouth Americaen
dc.subjectCichlidaeen
dc.subjectPiscesen
dc.subjectSymphysodonen
dc.subjectSymphysodon Aequifasciataen
dc.subjectSymphysodon Discusen
dc.subjectVertebrataen
dc.titleIntriguing evidence of translocations in Discus fish (Symphysodon, Cichlidae) and a report of the largest meiotic chromosomal chain observed in vertebratesen
dc.typeArtigopt_BR
dc.identifier.doi10.1038/hdy.2009.3-
dc.publisher.journalHereditypt_BR
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