Chromosome analysis in saccodon wagneri (Characiformes) and insights into the karyotype evolution of parodontidae

dc.contributor.authorNirchio, Mauro
dc.contributor.authorMasache, Maria Cecilia
dc.contributor.authorPaim, Fabilene Gomes [UNESP]
dc.contributor.authorCioffi, Marcelo de Bello
dc.contributor.authorFilho, Orlando Moreira
dc.contributor.authorBarriga, Ramiro
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorRossi, Anna Rita
dc.contributor.institutionUniversidad Técnica de Machala
dc.contributor.institutionUniversidad de Oriente
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionEscuela Politécnica Nacional
dc.contributor.institutionSapienza-Università di Roma
dc.date.accessioned2021-06-25T10:25:32Z
dc.date.available2021-06-25T10:25:32Z
dc.date.issued2021-01-01
dc.description.abstractParodontidae is a relatively small group of Neotropical characiform fishes consisting of three genera (Apareiodon, Parodon, and Saccodon) with 32 valid species. A vast cytogenetic literature is available on Apareiodon and Parodon, but to date, there is no cytogenetic data about Saccodon, a genus that contains only three species with a trans-Andean distribution. In the present study the karyotype of S. wagneri was described, based on both conventional (Giemsa staining, Ag-NOR, C-bands) and molecular (repetitive DNA mapping by fluorescent in situ hybridization) methods. A diploid chromosome number of 2n = 54 was observed in both sexes, and the presence of heteromorphic sex chromosomes of the ZZ/ ZW type was detected. The W chromosome has a terminal heterochromatin band that occupies approximately half of the long arm, being this band approximately half the size of the Z chromosome. The FISH assay showed a synteny of the 18S-rDNA and 5S-rDNA genes in the chromosome pair 14, and the absence of interstitial telomeric sites. Our data reinforce the hypothesis of a conservative karyotype structure in Parodontidae and suggest an ancient origin of the sex chromosomes in the fishes of this family.en
dc.description.affiliationUniversidad Técnica de Machala, Av. Panamericana km 5.5, Vía Pasaje
dc.description.affiliationEscuela de Ciencias Aplicadas del Mar Núcleo de Nueva Esparta Universidad de Oriente, Apartado 174
dc.description.affiliationDepartamento de Morfologia Instituto de Biociências Universidade Estadual Paulista-UNESP
dc.description.affiliationDepartamento de Genética e Evolução Universidade Federal de São Carlos
dc.description.affiliationInstituto de Ciencias Biológicas Escuela Politécnica Nacional
dc.description.affiliationDipartimento di Biologia e Biotecnologie “C. Darwin” Sapienza-Università di Roma, Via Alfonso Borelli 50
dc.description.affiliationUnespDepartamento de Morfologia Instituto de Biociências Universidade Estadual Paulista-UNESP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2014/26508–3
dc.description.sponsorshipIdFAPESP: 2016/09204–6
dc.description.sponsorshipIdFAPESP: 2018/20610–1
dc.description.sponsorshipIdCNPq: 306054/2006-0
dc.format.extent1-13
dc.identifierhttp://dx.doi.org/10.1590/1982-0224-2020-0103
dc.identifier.citationNeotropical Ichthyology, v. 19, n. 1, p. 1-13, 2021.
dc.identifier.doi10.1590/1982-0224-2020-0103
dc.identifier.fileS1679-62252021000100203.pdf
dc.identifier.issn1982-0224
dc.identifier.issn1679-6225
dc.identifier.scieloS1679-62252021000100203
dc.identifier.scopus2-s2.0-85102419751
dc.identifier.urihttp://hdl.handle.net/11449/206037
dc.language.isoeng
dc.relation.ispartofNeotropical Ichthyology
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAg-NOR
dc.subjectCytogenetics
dc.subjectFISH
dc.subjectHeterochromatin
dc.subjectZW sex chromosomes
dc.titleChromosome analysis in saccodon wagneri (Characiformes) and insights into the karyotype evolution of parodontidaeen
dc.typeArtigo

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