Local adaptation versus inbreeding depression in marginal populations of a Mediterranean alpine plant: are they worthy of conservation in a context of climate change? Morente-López, J., García-Fernández, A., Lara-Romero, C., Rubio-Teso, M.L., Ruiz, R., Sánchez, A., Iriondo, J.M. Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, E-28933 Móstoles, Madrid, Spain.
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Local adaptation vs inbreeding depression in marginal populations of a Mediterranean alpine plant
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Local adaptation versus inbreeding depression in marginal populations of a Mediterranean alpine plant: are they worthy
of conservation in a context of climate change?
Morente-López, J., García-Fernández, A., Lara-Romero, C., Rubio-Teso, M.L., Ruiz, R., Sánchez, A., Iriondo, J.M.
Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, E-28933 Móstoles, Madrid, Spain.
• Genetically impoverished populations
• Inbreeding depression• Maladaptation
• Not necessarilydepauperate for variationin ecologically relevanttraits.
• To assess whether marginal populations at the lowest elevation of Mediterranean alpine plants are locally adapted/maladapted to the environmental conditions that will prevail with global warming
• Seeds obtained in common garden conditions fromartificial crossings simulating different types of geneflow
Experimental design:
• Ex situ sowing experimentat optimum conditions in growth chamber and greenhouse environment(mother plant x type of cross x block x pop. = 8640 seeds).
• In situ sowing experimentat the locations of the 6 marginal populations(mother plant x type of cross x block x pop. = 24000 seeds)
Genetic differentiation in functional traits between central and marginal populations:• Tolerance to water stress (García-Fernández et al. 2013).• Flowering phenology: S. ciliata (unpublished results), Armeria caespitosa (Lara-
Romero et al., 2014)
García-Fernandez A, Iriondo JM, Bartels D, Escudero A.2013 Plant Biol 15:93-100.Lara-Romero C, García-Camacho R, Escudero A, Iriondo JM. 2014. Bot J Linn Soc 176:384-395.
1. High incidence of inbreeding depression in marginal populations.
2. Both adaptive/maladaptive geneflow between marginal populations at the germination stage.
3. No maladaptive geneflow between central and marginal populations at the germination stage.
4. Variation of responses to geneflow depending on themarginal population are probably associated to differencesin effective population size, genetic diversity and populationinbreeding.
5. Response to geneflow in a given marginal population is alsodependent on temporal variation of environmentalconditions
Local adaptation versus inbreeding depression in marginal populations of a Mediterranean alpine plant: are they
worthy of conservation in a context of climate change?
Acknowledgements:
• C. Diaz, G. Escribano, S. Prieto, P. Tabares, S. Eleazar, L. Cano & L. Martinez • Parque Nacional de la Sierra de Guadarrama• Parque Regional de la Sierra de Gredos• Reserva de la Biosfera de la Sierras de Béjar y Francia• AdAptA Project CGL2012-33528, Spanish National R&D&I Plan