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Chromosome polymorphism in the Brazilian dwarf brocket deer, Mazama nana (Mammalia, Cervidae)

dc.contributor.authorAbril, Vanessa Veltrini [UNESP]
dc.contributor.authorDuarte, José Maurício Barbanti [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:18:18Z
dc.date.available2014-05-20T13:18:18Z
dc.date.issued2008-01-01
dc.description.abstractThe Brazilian dwarf brocket deer (Mazama nana) is the smallest deer species in Brazil and is considered threatened due to the reduction and alteration of its habitat, the Atlantic Rainforest. Moreover, previous work suggested the presence of intraspecific chromosome polymorphisms which may contribute to further population instability because of the reduced fertility arising from the deleterious effects of chromosome rearrangements during meiosis. We used G- and C-banding, and nucleolus organizer regions localization by silver-nitrate staining (Ag-NOR) to investigate the causes of this variation. Mazama nana exhibited eight different karyotypes (2n = 36 through 39 and FN = 58) resulting from centric fusions and from inter and intraindividual variation in the number of B chromosomes (one to six). Most of the animals were heterozygous for a single fusion, suggesting one or several of the following: a) genetic instability in a species that has not reached its optimal karyotypic evolutionary state yet; b) negative selective pressure acting on accumulated rearrangements; and c) probable positive selection pressure for heterozygous individuals which maintains the polymorphism in the population (in contrast with the negative selection for many rearrangements within a single individual).en
dc.description.affiliationUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias
dc.description.affiliationUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia
dc.description.affiliationUnespUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias
dc.description.affiliationUnespUniversidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent53-57
dc.identifierhttp://dx.doi.org/10.1590/S1415-47572008000100011
dc.identifier.citationGenetics and Molecular Biology. Sociedade Brasileira de Genética, v. 31, n. 1, p. 53-57, 2008.
dc.identifier.doi10.1590/S1415-47572008000100011
dc.identifier.fileS1415-47572008000100011.pdf
dc.identifier.issn1415-4757
dc.identifier.scieloS1415-47572008000100011
dc.identifier.urihttp://hdl.handle.net/11449/4439
dc.identifier.wosWOS:000254487000011
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.subjectMazama nanaen
dc.subjectBrazilian dwarf brocket deeren
dc.subjectCytogeneticsen
dc.subjectchromosome polymorphismen
dc.subjectcentric fusionsen
dc.titleChromosome polymorphism in the Brazilian dwarf brocket deer, Mazama nana (Mammalia, Cervidae)en
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/gmb/iaboutj.htm
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentZootecnia - FCAVpt

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