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Los legados genéticos posglaciales y la demografía impulsada por el clima informan la conservación del abeto plateado
Francisco Balao1, Marc Ríos-Cadenas1, José Manuel Sánchez-Robles1,2
1Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain.
Annals of botany
|February 9, 2026
Resumen
La diversidad genética en el abeto plateado (Abies alba) revela linajes distintos formados por cambios climáticos pasados. Las poblaciones del sur fueron refugios estables, mientras que las del norte disminuyeron, con el impacto humano reciente causando la contracción del rango.
Área de la Ciencia:
- Genética de poblaciones genética de poblaciones.
- La filogeografía es la filogeografía.
- Biología evolutiva Biología evolutiva.
Sus antecedentes:
- La diversidad genética del abeto plateado (Abies alba) y la dinámica de su rango pasado son cruciales para comprender su demografía.
- La identificación de las vías de colonización postglacial y los refugios glaciales vulnerables es esencial para la conservación.
Objetivo del estudio:
- Para explorar la diversidad genética y la dinámica de rango pasado del abeto plateado (Abies alba).
- Para delinear la demografía pasada, las rutas de colonización postglaciales y la vulnerabilidad actual de los refugios glaciales.
Principales métodos:
- Se aplicó la secuenciación de ADN asociada al sitio de restricción (RAD-seq) a 26 poblaciones de Abies alba.
- La estructura filogeográfica y los cambios demográficos históricos se analizaron utilizando marcadores SNP.
Principales resultados:
- Se identificaron tres linajes distintos de abeto plateado: uno del sur y dos del norte.
- Las poblaciones del sur permanecieron como refugios glaciales estables, mientras que las poblaciones del norte disminuyeron durante el Pleistoceno.
- La presión humana durante el Holoceno causó un abrupto declive de la gama, a pesar de los antiguos eventos demográficos.
Conclusiones:
- Un marco que utiliza marcadores SNP efectivamente delimita los linajes filogeográficos del abeto de plata y las zonas de contacto.
- Las poblaciones de vanguardia identificadas a través de inferencias demográficas pasadas requieren esfuerzos de conservación prioritarios.
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