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Cytogenetic markers as diagnoses in the identification of the hybrid between Piauçu (Leporinus macrocephalus) and Piapara (Leporinus elongatus)

dc.contributor.authorPorto-Foresti, Fábio [UNESP]
dc.contributor.authorHashimoto, Diogo Teruo [UNESP]
dc.contributor.authorAlves, Anderson Luis
dc.contributor.authorAlmeida, Rodrigo Braz Castilho [UNESP]
dc.contributor.authorSenhorini, José Augusto
dc.contributor.authorBortolozzi, Jehud [UNESP]
dc.contributor.authorForesti, Fausto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionInstituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis
dc.date.accessioned2014-05-20T13:25:45Z
dc.date.available2014-05-20T13:25:45Z
dc.date.issued2008-01-01
dc.description.abstractThe genetic monitoring of interspecific hybrids involves the application of methodologies able to provide an easy and indubitable genetic characterization of both parental and hybrid individuals. In the present work, cytogenetic techniques were used to identify a hybrid lineage of Piaupara in order to caracterize them in relation to the parental species, Leporinus macrocephalus (piauçu) and L. elongatus (piapara). The cytogenetic analysis revealed that L. macrocephalus presented 2n = 54 chromosomes and a nucleolar organizer regions (NOR) at the telomere of the long arm of the submetacentric chromosome pair 2. Analysis of constitutive heterochromatin (C-banding) revealed a conspicuous block at the pericentromeric region on the long arm of a submetacentric chromosome pair. L. elongatus presented the same diploid number, 2n = 54, and a karyotypic formula similar to that of L. macrocephalus. The NORs were also at the telomere of the long arm of the submetacentric pair 2, which was morphologically different from that of L. macrocephalus. Heterochromatic blocks were observed at both telomeres of a submetacentric chromosome pair. The hybrid Piaupara presented the same diploid number (2n = 54) and karyotypic formula as the parental species and there were no visible differences between parental and hybrid individuals. Differently from the Giemsa staining, NOR- and C-banding analysis showed marked differences which allowed the identification of the hybrids by the different morphology and/or size of the chromosomes carrying the NORs and patterns of heterochromatin distribution in their chromosomes. Such genetic studies are important for fish culture since they can provide tools for monitoring natural and artificial hybridization. They are also useful in biological conservation programmes and in the proper management of natural and reared fish stocks.en
dc.description.affiliationUniversidade Estadual Paulista Faculdade de Ciências Departamento de Ciências Biológicas
dc.description.affiliationUniversidade Estadual de Campinas Instituto de Biologia Departamento de Parasitologia
dc.description.affiliationUniversidade Estadual Paulista Instituto de Biociências Departamento de Morfologia
dc.description.affiliationInstituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis Centro de Pesquisa e Gestão de Recursos Pesqueiros Continentais
dc.description.affiliationUnespUniversidade Estadual Paulista Faculdade de Ciências Departamento de Ciências Biológicas
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.format.extent195-202
dc.identifierhttp://dx.doi.org/10.1590/S1415-47572008000200005
dc.identifier.citationGenetics and Molecular Biology. Sociedade Brasileira de Genética, v. 31, n. 1, p. 195-202, 2008.
dc.identifier.doi10.1590/S1415-47572008000200005
dc.identifier.fileS1415-47572008000200005.pdf
dc.identifier.issn1415-4757
dc.identifier.lattes3815338174165832
dc.identifier.scieloS1415-47572008000200005
dc.identifier.scopus2-s2.0-46649084417
dc.identifier.urihttp://hdl.handle.net/11449/8187
dc.identifier.wosWOS:000257238500005
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.subjectinterspecific hybriden
dc.subjectfish cultureen
dc.subjectfish cytogeneticsen
dc.titleCytogenetic markers as diagnoses in the identification of the hybrid between Piauçu (Leporinus macrocephalus) and Piapara (Leporinus elongatus)en
dc.typeArtigo
unesp.author.lattes3815338174165832
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentCiências Biológicas - FCpt

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