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Fiorillo BF, Sarria-Perea JA, Abril VV, et al. Cytogenetic description of the Amazonian brown brocket Mazama nemorivaga (Artiodactyla, Cervidae). Comp Cytogenet. 2013;7(1):25-31doi: 10.3897/CompCytogen.v7i1.4314.
Fiorillo, B. F., Sarria-Perea, J. A., Abril, V. V., & Duarte, J. M. (2013). Cytogenetic description of the Amazonian brown brocket Mazama nemorivaga (Artiodactyla, Cervidae). Comparative cytogenetics, 7(1), 25-31. https://doi.org/10.3897/CompCytogen.v7i1.4314
Fiorillo, Bruno Ferreto, et al. "Cytogenetic description of the Amazonian brown brocket Mazama nemorivaga (Artiodactyla, Cervidae)." Comparative cytogenetics vol. 7,1 (2013): 25-31. doi: https://doi.org/10.3897/CompCytogen.v7i1.4314
Fiorillo BF, Sarria-Perea JA, Abril VV, Duarte JM. Cytogenetic description of the Amazonian brown brocket Mazama nemorivaga (Artiodactyla, Cervidae). Comp Cytogenet. 2013 Mar 18;7(1):25-31. doi: 10.3897/CompCytogen.v7i1.4314. eCollection 2013. PMID: 24260687; PMCID: PMC3833750.
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Comp Cytogenet. 2013 Mar 18;7(1):25-31. doi: 10.3897/CompCytogen.v7i1.4314. eCollection 2013.

Cytogenetic description of the Amazonian brown brocket Mazama nemorivaga (Artiodactyla, Cervidae).

Comparative cytogenetics

Bruno Ferreto Fiorillo, Javier Adolfo Sarria-Perea, Vanessa Veltrini Abril, José Maurício Barbanti Duarte

Affiliations

  1. 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, Brazil.

PMID: 24260687 PMCID: PMC3833750 DOI: 10.3897/CompCytogen.v7i1.4314

Abstract

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 Mazama nemorivaga karyotype showed the 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 Mazama nemorivaga and its proximity to the ancestral karyotype of the American Odocoileini. A derived karyotype 2n=67, XY1Y2, FN=70 + 3B from the Brazilian state of Mato Grosso (the western Amazon) may be evidence of differentiation between western and eastern populations.

Keywords: B chromosomes; centric fusion; chromosome banding; multiple sex chromosome system

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