Genetic diversity of Oenothera drummondii (Onagraceae), a dune coastal herb: ecological and evolutionary implications
We studied the diversity and genetic structure of Oenothera drummondii Hook. (Onagraceae), a dune plant with a mixed reproductive system, across 9 populations using 10 microsatellite markers. Plant genetic diversity is governed by intrinsic factors (i.e., reproductive system and dispersal) and extri...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:dnet:idus________::dbc0cd9e47baddaa981df8f630a09fce |
| Acceso en línea: | https://hdl.handle.net/11441/186071 https://doi.org/10.22201/ib.20078706e.2026.97.5708 |
| Access Level: | acceso abierto |
| Palabra clave: | Neutral genetic diversity Coastal dunes Microsatellites Genetic bottleneck Latitude Selfing Diversidad genética neutral Dunas costeras Microsatélites Cuellos de botella Latitud Autocompatibilidad |
| Sumario: | We studied the diversity and genetic structure of Oenothera drummondii Hook. (Onagraceae), a dune plant with a mixed reproductive system, across 9 populations using 10 microsatellite markers. Plant genetic diversity is governed by intrinsic factors (i.e., reproductive system and dispersal) and extrinsic factors (i.e., population f luctuations and founder effects). We found moderate to low genetic diversity, with southern populations showing lower diversity, and northern populations higher. A separate study on self-compatibility revealed higher selfing in the south and lower in the north, suggesting a latitudinal gradient that may reduce genetic diversity in southern populations. Peripheral populations showed reduced diversity and greater differentiation, likely due to increased isolation and limited gene f low. Central populations near the Texas origin exhibited the highest diversity. Populations from Baja California (O. drummondii subsp. thalassaphila) formed a genetically distinct group, suggesting a separate species. Overall, genetic patterns in O. drummondii genetic diversity ref lect historical and ecological inf luences, including mating system variation, f loral traits, and pollinator dynamics. These findings support hypotheses such as center-periphery dynamics and climate-driven historical processes (e.g., post-glacial expansion), which may shape the species’ genetic landscape and suggest possible local adaptations to environmental changes. |
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