Publicação:
Description of a ZZ/ZW sex chromosome system in Thoracocharax cf. stellatus (Teleostei, Characiformes, Gasteropelecidae)

dc.contributor.authorCarvalho, Margarida Lima
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorForesti, Fausto [UNESP]
dc.contributor.institutionUniversidade Federal do Acre (UFAC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:17:25Z
dc.date.available2014-05-20T15:17:25Z
dc.date.issued2002-01-01
dc.description.abstractThe family Gasteropelecidae is composed of three genera and eight species. This study shows that Thoracocharax cf. stellatus has 2n = 52 chromosomes for both sexes. The five males studied showed 8 metacentric, 16 submetacentric, 4 subtelocentric, and 24 acrocentric chromosomes; the seven females showed only one submetacentric chromosome, belonging to pair 11, and one extra acrocentric chromosome, smaller than all the other chromosomes, characterizing the presence of a ZZ/ZW sex chromosome system in this species. Nucleolus organizing regions (NORs) were detected on the short arms of the subtelocentric chromosome pair 13. Constitutive heterochromatin was identified at pericentromeric and terminal positions in almost all chromosomes. The W chromosome was almost entirely heterochromatic, except for a small terminal euchromatic segment. The analyses of the amount of nuclear DNA found 2.18 ± 0.09 pg of DNA per diploid nucleus, without significant differences between sexes. A discussion about the evolution of the sex chromosomes in this group is presented.en
dc.description.affiliationUniversidade Federal do Acre Departamento de Ciências da Natureza
dc.description.affiliationUniversidade Estadual Paulista Instituto de Biociências Departamento de Morfologia
dc.description.affiliationUnespUniversidade Estadual Paulista Instituto de Biociências Departamento de Morfologia
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.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.format.extent299-303
dc.identifierhttp://dx.doi.org/10.1590/S1415-47572002000300008
dc.identifier.citationGenetics and Molecular Biology. Sociedade Brasileira de Genética, v. 25, n. 3, p. 299-303, 2002.
dc.identifier.doi10.1590/S1415-47572002000300008
dc.identifier.fileS1415-47572002000300008.pdf
dc.identifier.issn1415-4757
dc.identifier.lattes0804793944846367
dc.identifier.scieloS1415-47572002000300008
dc.identifier.urihttp://hdl.handle.net/11449/30462
dc.language.isoeng
dc.publisherSociedade Brasileira de Genética
dc.relation.ispartofGenetics and Molecular Biology
dc.relation.ispartofjcr1.493
dc.relation.ispartofsjr0,638
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectsex chromosomesen
dc.subjectZWen
dc.subjectDNA contenten
dc.subjectfishen
dc.subjectevolutionen
dc.titleDescription of a ZZ/ZW sex chromosome system in Thoracocharax cf. stellatus (Teleostei, Characiformes, Gasteropelecidae)en
dc.typeArtigo
dspace.entity.typePublication
unesp.author.lattes0804793944846367
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Botucatupt
unesp.departmentMorfologia - IBBpt

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