Evidence of divergent selection for drought and cold tolerance at landscape and local scales in [i]Abies alba[/i] Mill. in the French Mediterranean Alps
2016
Roschanski, Anna M. | Csillery, Katalin | Liepelt, Sascha | Muratorio, Sylvie | Ziegenhagen, Birgit | Huard, Frédéric | Ullrich, Kristian K. | Postolache, Dragos | Vendramin, Giovanni Giuseppe | Fady, Bruno | Faculty of Biology, Conservation Biology ; Philipps Universität Marburg = Philipps University of Marburg | Unité de Recherches Forestières Méditerranéennes (URFM) ; Institut National de la Recherche Agronomique (INRA) | Agroclim (AGROCLIM) ; Institut National de la Recherche Agronomique (INRA) | Faculty of Biology, Cell Biology ; Philipps Universität Marburg = Philipps University of Marburg | Scuola Universitaria Superiore Sant'Anna = Sant'Anna School of Advanced Studies [Pisa] (SSSUP) | Institute of Biosciences and Bioresources ; National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR) | ANR-12-EBID-0003,Tiptree,Scénarios pour la dynamique de la biodiversité des forêts européennes sous changement global identifier les points de basculement micro-evolutifs(2012)
Understanding local adaptation in forest trees is currently a key research and societal priority. Geographically and ecologically marginal populations provide ideal case studies, because environmental stress along with reduced gene flow can facilitate the establishment of locally adapted populations. We sampled European silver fir ([i]Abies alba[/i] Mill.) trees in the French Mediterranean Alps, along the margin of its distribution range, from pairs of high- and low-elevation plots on four different mountains situated along a 170-km east–west transect. The analysis of 267 SNP loci from 175 candidate genes suggested a neutral pattern of east–west isolation by distance among mountain sites. FST outlier tests revealed 16 SNPs that showed patterns of divergent selection. Plot climate was characterized using both in situ measurements and gridded data that revealed marked differences between and within mountains with different trends depending on the season. Association between allelic frequencies and bioclimatic variables revealed eight genes that contained candidate SNPs, of which two were also detected using FST outlier methods. All SNPs were associated with winter drought, and one of them showed strong evidence of selection with respect to elevation. QST– FST tests for fitness-related traits measured in a common garden suggested adaptive divergence for the date of bud flush and for growth rate. Overall, our results suggest a complex adaptive picture for A. alba in the southern French Alps where, during the east-to-west Holocene recolonization, locally advantageous genetic variants established at both the landscape and local scales
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Institut national de la recherche agronomique
