| Revista: | Genetics and molecular biology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000418099 |
| ISSN: | 1415-4757 |
| Autores: | Fornel, Rodrigo1 Cordeiro-Estrela, Pedro2 Freitas, Thales Renato O. de3 |
| Instituciones: | 1Universidade Federal do Rio Grande do Sul, Departamento de Genetica, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade Federal da Paraiba, Centro de Ciencias Exatas e da Natureza, Joao Pessoa, Paraiba. Brasil 3Universidade Federal do Rio Grande do Sul, Programa de Pos-Graduacao em Genetica e Biologia Molecular, Porto Alegre, Rio Grande do Sul. Brasil |
| Año: | 2018 |
| Volumen: | 41 |
| Paginación: | 263-272 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | We tested the association between chromosomal polymorphism and skull shape and size variation in two groups of the subterranean rodent Ctenomys . The hypothesis is based on the premise that chromosomal rearrangements in small populations, as it occurs in Ctenomys , produce reproductive isolation and allow the independent diversification of populations. The mendocinus group has species with low chromosomal diploid number variation (2n=46-48), while species from the torquatus group have a higher karyotype variation (2n=42-70). We analyzed the shape and size variation of skull and mandible by a geometric morphometric approach, with univariate and multivariate statisti- cal analysis in 12 species from mendocinus and torquatus groups of the genus Ctenomys . We used 763 adult skulls in dorsal, ventral, and lateral views, and 515 mandibles in lateral view and 93 landmarks in four views. Although we expected more phenotypic variation in the torquatus than the mendocinus group, our results rejected the hypothesis of an association between chromosomal polymorphism and skull shape and size variation. Moreover, the torquatus group did not show more variation than mendocinus. Habitat heterogeneity associated to biomechanical constraints and other factors like geography, phylogeny, and demography, may affect skull morphological evolution in Ctenomys |
| Disciplinas: | Biología |
| Palabras clave: | Mamíferos, Anatomía e histología, Evolución y filogenia, Cráneo, Morfometría geométrica, Evolución fenotípica, Roedores subterráneos |
| Keyword: | Mammals, Anatomy and histology, Evolution and phylogeny, Cranium, Geometric morphometrics, Phenotypic evolution, Subterranean rodents |
| Texto completo: | Texto completo (Ver PDF) |
