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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Intrapopulation Chromosomal Polymorphism in Mazama gouazoubira (Cetartiodactyla; Cervidae The Emergence of a New Species?

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Author(s):
Valeri, Mirela P. [1] ; Tomazella, Iara M. [1] ; Duarte, Jose M. B. [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista UNESP, Fac Ciencias Agr & Vet, Dept Zootecnia, Nucleo Pesquisa & Conservacao Cervideos NUPECCE, Jaboticabal - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Cytogenetic and Genome Research; v. 154, n. 3, p. 147-152, 2018.
Web of Science Citations: 1
Abstract

Mazama gouazoubira is a small deer species widely distributed in South America. Previous studies have shown that this species presents intraspecific chromosomal polymorphisms, which could affect fertility due to the effects of chromosomal rearrangements on gamete formation. Important aspects regarding the karyotype evolution of this species and the genus remain undefined due to the lack of information concerning the causes of this chromosomal variation. Nineteen individuals belonging to the Mazama gouazoubira population located in the Pantanal were cytogenetically evaluated. Among the individuals analyzed, 9 had B chromosomes and 5 carried a heterozygous centric fusion (2n = 69 and FN = 70). In 3 individuals, the fusion occurred between chromosomes X and 16, in 1 individual between chromosomes 7 and 21, and in another individual between chromosomes 4 and 16. These striking polymorphisms could be explained by several hypotheses. One is that the chromosome rearrangements in this species are recent and not fixed in the population yet, and another hypothesis is that they represent a balanced polymorphism and that heterozygotes have an adaptive ad vantage. On the other hand, these polymorphisms may negatively influence fertility and raise questions about sustainability or reproductive isolation of the population. (C) 2018 S. Karger AG, Basel (AU)

FAPESP's process: 12/21044-3 - Karyotype characterization of a Mazama gouazoubira (ARTIODACTYLA; CERVIDAE) population from the Nhecolândia Pantanal
Grantee:Mirela Pelizaro Valeri
Support Opportunities: Scholarships in Brazil - Scientific Initiation