Revista: | Genetics and molecular biology |
Base de datos: | PERIÓDICA |
Número de sistema: | 000418157 |
ISSN: | 1415-4757 |
Autores: | Barros, Michel J.F1 Diniz-Filho, Jose Alexandre Felizola2 Freitas, Loreta B1 |
Instituciones: | 1Universidade Federal do Rio Grande do Sul, Departamento de Genetica, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade Federal de Goias, Departamento de Ecologia, Goiania, Goias. Brasil |
Año: | 2018 |
Volumen: | 41 |
Paginación: | 318-326 |
País: | Brasil |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Analítico |
Resumen en inglés | The Tropical Niche Conservatism hypothesis is one of the most relevant theories to explain why tropical diversity is high, although the mechanisms underlying this hypothesis require further clarification. A possible research avenue to address the underlying mechanisms includes determining population-level processes associated with such a hypothesis, in particular by trying to identify how adaptation may occur in extreme niche conditions at the edges of species ranges. However, the determinants of molecular diversity at the edges of geographical distributions of tropical taxa are still poorly known. Here we assessed which environmental variables determine diversity in nuclear and plastid genetic markers for populations of four Passiflora species in the southern limit of their geographical distribu - tions. Climatic factors can drive genetic diversity, and their importance varies according to the marker. The primary predictors are variables representing higher temperatures during cold periods of the year and higher precipitation during dry periods. We concluded that, although these species are present in colder areas at the edge of their range, Tropical Niche Conservatism acts as a restraining force on genetic diversity in southern populations of Passiflora |
Disciplinas: | Biología |
Palabras clave: | Ecología, Genética, Evolución y filogenia, Bordes, Distribución geográfica, Diversidad genética, Passiflora, Conservadurismo, Nichos ecológicos |
Keyword: | Ecology, Genetics, Evolution and phylogeny, Edges, Geographical distribution, Genetic diversity, Passiflora, Conservatism, Ecological niche |
Texto completo: | Texto completo (Ver PDF) |