A natural triploid in Trichomycterus davisi (Siluriformes, Trichomycteridae): mitotic and meiotic characterization by chromosome banding and synaptonemal complex analyses

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dc.contributor.authorBorin, L. A.
dc.contributor.authorMartins-Santos, I. C.
dc.contributor.authorOliveira, C.
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:22:39Z
dc.date.available2014-05-20T15:22:39Z
dc.date.issued2002-08-01
dc.description.abstractWithin a total of 50 analyzed specimens a male individual of Trichomycterus davisi has been recorded with 81 chromosomes including 60 metacentric, 18 submetacentric and three subtelocentric chromosomes. When compared with diploid individuals (2n = 54) and the morphological standard of chromosomes, this male is a triploid with 3 = 81 chromosomes. Since staining with silver nitrate indicates three active nucleolar organizer regions (NORs), the three NOR- bearing chromosomes in this individual are genetically active. Analysis of the synaptonemal complex (SC) by electronic microscopy shows that there is an incomplete pairing of the third set of chromosomes in the triploid individual.en
dc.description.affiliationState Univ Maringa, Dept Cell Biol & Genet, BR-87020900 Maringa, Parana, Brazil
dc.description.affiliationPaulista State Univ, Inst Life Sci, Dept Morphol, Botucatu, SP, Brazil
dc.description.affiliationUnespPaulista State Univ, Inst Life Sci, Dept Morphol, Botucatu, SP, Brazil
dc.format.extent253-258
dc.identifierhttp://dx.doi.org/10.1023/A:1020667526552
dc.identifier.citationGenetica. Dordrecht: Kluwer Academic Publ, v. 115, n. 3, p. 253-258, 2002.
dc.identifier.doi10.1023/A:1020667526552
dc.identifier.issn0016-6707
dc.identifier.urihttp://hdl.handle.net/11449/33597
dc.identifier.wosWOS:000178541200002
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofGenetica
dc.relation.ispartofjcr1.366
dc.relation.ispartofsjr0,649
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectchromomycin A(3)pt
dc.subjectkaryotypept
dc.subjectNOR bandpt
dc.subjectsynaptonemal complexpt
dc.subjectTrichomycterus davisipt
dc.subjecttriploidpt
dc.titleA natural triploid in Trichomycterus davisi (Siluriformes, Trichomycteridae): mitotic and meiotic characterization by chromosome banding and synaptonemal complex analysesen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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