| Revue: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000436044 |
| ISSN: | 0001-3765 |
| Autores: | Hoeltgebaum, Marcia P1 Lauterjung, Miguel B1 Montagna, Tiago1 Candido Ribeiro, Rafael1 Vieira, Willian1 Bernardi, Alison P1 Cristofolini, Caroline1 Reis, Maurício S. dos1 |
| Instituciones: | 1Universidade Federal de Santa Catarina, Centro de Ciencias Agrarias, Florianopolis, Santa Catarina. Brasil |
| Año: | 2020 |
| Volumen: | 92 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The restinga is a threatened Brazilian ecosystem and a highly heterogeneous environment. This work aimed to evaluate demographic and genetic aspects of Varronia curassavica and whether environmental heterogeneity can influence the studied population parameters. Three annual evaluations were carried out in an area of restinga in Florianópolis-SC, Brazil. Demographic data were analyzed using descriptive statistics, and the spatial distribution pattern was calculated by Ripley’s K-function and correlated with environmental characteristics. To characterize diversity and genetic structure, eight microsatellite markers were used. This work demonstrated that variations in the distribution of individuals and genotypes can be related to specific environments. Dry lowlands were environments favorable to population development, and flooded lowland and mobile dunes were unfavorable. The fixation indices were distinct between environments, evidencing a tendency toward preferential crosses in favor of heterozygotes. We found absence of spatial genetic structure, indicating that genotypes are randomly distributed and that gene flow may be related to such genetic factors as the presence of autoincompatibility mechanisms. This diversity of environments contributed to the aggregate distribution and is relevant for the maintenance of demographic and genetic processes of the species in restingas, and this aspect should be considered for in situ conservation |
| Disciplinas: | Biología |
| Palabras clave: | Angiospermas, Genética, Ecología, Estructura genética, Dinámica poblacional, Distribución espacial, Marcadores genéticos, Ecosistemas costeros, Varronia curassavica, Boraginaceae |
| Keyword: | Angiosperms, Genetics, Ecology, Genetic structure, Population dynamics, Spatial distribution, Genetic markers, Coastal ecosystems, Varronia curassavica, Boraginaceae |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
