Oecomys catherinae (Sigmodontinae, Cricetidae): Evidence for chromosomal speciation?
| Autor: | Maria I. C. Sampaio, Paulo Henrique Asfora, Cleusa Yoshiko Nagamachi, Rogério Vieira Rossi, Adenilson Leão Pereira, Julio Cesar Pieczarka, Malcolm A. Ferguson-Smith, Stella Miranda Malcher, Patricia Caroline Mary O’Brien, Lena Geise, Victor Fonsêca da Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Male Speciation lcsh:Medicine Forests 01 natural sciences lcsh:Science In Situ Hybridization Fluorescence Phylogeny Multidisciplinary Sigmodontinae biology Ecology Cytochrome b Arvicolinae Chromosome Biology Chromosome Mapping Terrestrial Environments Oecomys catherinae Female Karyotypes Brazil Cricetidae Research Article Species complex Evolutionary Processes Karyotype Molecular Probe Techniques Research and Analysis Methods 010603 evolutionary biology Chromosomes Ecosystems Chromosome Painting 03 medical and health sciences Cytogenetics Species Specificity Cryptic Speciation Genetics Animals Molecular Biology Techniques Oryzomyini Molecular Biology Evolutionary Biology Oecomys Gene Mapping Ecology and Environmental Sciences lcsh:R Biology and Life Sciences Cell Biology biology.organism_classification Chromosome Pairs Chromosomes Mammalian Probe Hybridization Hylaeamys megacephalus 030104 developmental biology Evolutionary biology Karyotyping lcsh:Q |
| Zdroj: | PLoS ONE, Vol 12, Iss 7, p e0181434 (2017) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | Among the Oryzomyini (Sigmodontinae), Oecomys is the most speciose, with 17 species. This genus presents high karyotypic diversity (2n = 54 to 2n = 86) and many taxonomic issues at the species level because of the presence of cryptic species and the overlap of morphological characters. For these reasons the real number of species of Oecomys may be underestimated. With the aim of verifying if the taxon Oecomys catherinae is composed of more than one species, we made comparative studies on two populations from two regions of Brazil, one from the Amazon and another from the Atlantic Forest using both classical cytogenetics (G- and C-banding) and comparative genomic mapping with whole chromosome probes of Hylaeamys megacephalus (HME), molecular data (cytochrome b mitochondrial DNA) and morphology. Our results confirm that Oecomys catherinae occurs in the southeast Amazon, and reveal a new karyotype for the species (2n = 62, FNa = 62). The comparative genomic analysis with HME probes identified chromosomal homeologies between both populations and rearrangements that are responsible for the different karyotypes. We compared our results in Sigmodontinae genera with other studies that also used HME probes. These chromosomal differences together with the absence of consistent differentiation between the two populations on morphological and molecular analyses suggest that these populations may represent cryptic species. |
| Databáze: | OpenAIRE |
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