The emergence of a new sex-system (XX/XY₁Y₂) suggests a species complex in the "monotypic" rodent Oecomys auyantepui (Rodentia, Sigmodontinae).

ABSTRACT: X-autosome translocation (XY₁Y₂) has been reported in distinct groups of vertebrates suggesting that the rise of a multiple sex system within a species may act as a reproductive barrier and lead to speciation. The viability of this system has been linked with repetitive sequences located between sex and autosomal portions of the translocation. Herein, we investigate Oecomys auyantepui, using chromosome banding and Fluorescence In Situ Hybridization with telomeric and Hylaeamys megacephalus whole-chromosome probes, and phylogenetic reconstruction using mtDNA and nuDNA sequences. We describe an amended karyotype for O. auyantepui (2n = 64♀65♂/FNa = 84) and report for the first time a multiple sex system (XX/XY₁Y₂) in Oryzomyini rodents. Molecular d

SUBMITTER: Oliveira da Silva W 

PROVIDER: S-EPMC9130129 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature