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

dc.creatorPorto-Foresti, F
dc.creatorHashimoto, DT
dc.creatorAlves, AL
dc.creatorAlmeida, RBC
dc.creatorSenhorini, JA
dc.creatorBortolozzi, J
dc.creatorForesti, F
dc.date2008
dc.dateAPR
dc.date2014-11-18T10:44:51Z
dc.date2015-11-26T16:54:02Z
dc.date2014-11-18T10:44:51Z
dc.date2015-11-26T16:54:02Z
dc.date.accessioned2018-03-28T23:41:16Z
dc.date.available2018-03-28T23:41:16Z
dc.identifierGenetics And Molecular Biology. Soc Brasil Genetica, v. 31, n. 1, n. 195, n. 202, 2008.
dc.identifier1415-4757
dc.identifierWOS:000257238500005
dc.identifier10.1590/S1415-47572008000200005
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57581
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/57581
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57581
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276746
dc.descriptionThe 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 (piauqu) 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.
dc.description31
dc.description1
dc.descriptionS
dc.description195
dc.description202
dc.languageen
dc.publisherSoc Brasil Genetica
dc.publisherRibeirao Pret
dc.publisherBrasil
dc.relationGenetics And Molecular Biology
dc.relationGenet. Mol. Biol.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectinterspecific hybrid
dc.subjectfish culture
dc.subjectfish cytogenetics
dc.subjectNucleolus Organizer Regions
dc.subjectSex-chromosomes
dc.subjectAnostomidae
dc.subjectHeterochromatin
dc.subjectFish
dc.subjectCharaciformes
dc.subjectPisces
dc.subjectHybridization
dc.subjectDominance
dc.titleCytogenetic markers as diagnoses in the identification of the hybrid between Piaucu (Leporinus macrocephalus) and Piapara (Leporinus elongatus)
dc.typeArtículos de revistas


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