Author(s): Fiorillo, Bruno Ferreto [UNESP] ; Sarria-Perea, Javier Adolfo [UNESP] ; Abril, Vanessa Veltrini [UNESP] ; Duarte, José Maurício Barbanti [UNESP]
Date: 2014
Persistent ID: http://hdl.handle.net/11449/75441
Origin: Oasisbr
Subject(s): B chromosomes; Centric fusion; Chromosome banding; Multiple sex chromosome system
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The Amazonian brown brocket Mazama nemorivaga (Cuvier, 1817) is a small to medium-sized deer from the Amazon rainforest and ecotones. The first karyotype described was 2n=67 to 69 + 2-7 B and FN= 69-72, in which all chromosomes were acrocentric and the X chromosome was the only submetacentric chromosome. However, important aspects of the species chromosome evolution were not resolved because of the lack of information on chromosome banding. The G-banding pattern of M. nemorivaga karyotype showedthe presence of an XX/XY1Y2 sex chromosome system as a product of an X-autosome tandem fusion, which results in a basic 2n=68, FN=70 in females and 2n= 69, FN=70 in males. The fact that this karyotype only differs from that of Capreolus capreolus pygargus (Pallas, 1771; 2n=70, FN=72+B) by X-autosome tandem fusion may corroborate the basal condition of M. nemorivaga and its proximity to the ancestral karyotype of the American Odocoileini. A derived karyotype 2n=67, XY1Y2, FN=70 + 3B from the Brazilianstate of Mato Grosso (the western Amazon) may be evidence of differentiation between western and eastern populations. © Bruno Ferreto Fiorillo et al.
Núcleo de Pesquisa e Conservação de Cervídeos (NUPECCE) Departamento de Zootecnia Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, 14884-900, Jaboticabal, SP
Programa de Pós-Graduação em Genética e Melhoramento Animal Faculdade de Ciências Agrárias e Veterinárias UNESP, Campus de Jaboticabal, 14884-900, Jaboticabal, SP
Núcleo de Pesquisa e Conservação de Cervídeos (NUPECCE) Departamento de Zootecnia Faculdade de Ciências Agrárias e Veterinárias, UNESP, Campus de Jaboticabal, 14884-900, Jaboticabal, SP
Programa de Pós-Graduação em Genética e Melhoramento Animal Faculdade de Ciências Agrárias e Veterinárias UNESP, Campus de Jaboticabal, 14884-900, Jaboticabal, SP
