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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Molecular divergence in tropical tree populations occupying environmental mosaics</title>
<creator>Audigeos, Delphine</creator>
<creator>Brousseau, Louise</creator>
<creator>Traissac, S.</creator>
<creator>Scotti-Saintagne, Caroline</creator>
<creator>Scotti, Ivan</creator>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Conseil Regional d'Aquitaine [20030304002FA, 20040305003FA]; European Union, FEDER [2003227]; EU; French Ministry of Ecology and Sustainable Development 'ECOFOR - ECOSYSTEMES TROPICAUX' program</contributor>
<source>ISSN: 1010-061X</source>
<source>EISSN: 1420-9101</source>
<source>Journal of Evolutionary Biology</source>
<publisher>Wiley</publisher>
<identifier>hal-01032412</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032412</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032412</source>
<source>Journal of Evolutionary Biology, Wiley, 2013, 26 (3), pp.529 - 544. 〈10.1111/jeb.12069〉</source>
<identifier>DOI : 10.1111/jeb.12069</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/jeb.12069</relation>
<language>en</language>
<subject lang=en>candidate genes</subject>
<subject lang=en>drought</subject>
<subject lang=en>Eperua falcata</subject>
<subject lang=en>flooding</subject>
<subject lang=en>neotropics</subject>
<subject lang=en>outlier loci</subject>
<subject lang=en>tree genetics</subject>
<subject lang=en>SPRUCE PICEA-ABIES</subject>
<subject lang=en>SPATIAL GENETIC-STRUCTURE</subject>
<subject lang=en>SINGLE-NUCLEOTIDE POLYMORPHISMS</subject>
<subject lang=en>PINE PINUS-TAEDA</subject>
<subject lang=en>LINKAGE DISEQUILIBRIUM</subject>
<subject lang=en>RAIN-FOREST</subject>
<subject lang=en>LOCAL ADAPTATION</subject>
<subject lang=en>NATURAL-POPULATIONS</subject>
<subject lang=en>FRENCH-GUIANA</subject>
<subject lang=en>HAPLOTYPE RECONSTRUCTION</subject>
<subject>[SDV.SA] Life Sciences [q-bio]/Agricultural sciences</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Unveiling the genetic basis of local adaptation to environmental variation is a major goal in molecular ecology. In rugged landscapes characterized by environmental mosaics, living populations and communities can experience steep ecological gradients over very short geographical distances. In lowland tropical forests, interspecific divergence in edaphic specialization (for seasonally flooded bottomlands and seasonally dry terra firme soils) has been proven by ecological studies on adaptive traits. Some species are nevertheless capable of covering the entire span of the gradient; intraspecific variation for adaptation to contrasting conditions may explain the distribution of such ecological generalists. We investigated whether local divergence happens at small spatial scales in two stands of Eperua falcata (Fabaceae), a widespread tree species of the Guiana Shield. We investigated Single Nucleotide Polymorphisms (SNP) and sequence divergence as well as spatial genetic structure (SGS) at four genes putatively involved in stress response and three genes with unknown function. Significant genetic differentiation was observed among sub-populations within stands, and eight SNP loci showed patterns compatible with disruptive selection. SGS analysis showed genetic turnover along the gradients at three loci, and at least one haplotype was found to be in repulsion with one habitat. Taken together, these results suggest genetic differentiation at small spatial scale in spite of gene flow. We hypothesize that heterogeneous environments may cause molecular divergence, possibly associated to local adaptation in E. falcata.</description>
<date>2013</date>
</dc>
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