title: Glacial refugia: hotspots but not melting pots of genetic diversity.
abstract: Glacial refuge areas are expected to harbor a large fraction of the intraspecific biodiversity of the temperate biota. To test this hypothesis, we studied chloroplast DNA variation in 22 widespread European trees and shrubs sampled in the same forests. Most species had genetically divergent populations in Mediterranean regions, especially those with low seed dispersal abilities. However, the genetically most diverse populations were not located in the south but at intermediate latitudes, a likely consequence of the admixture of divergent lineages colonizing the continent from separate refugia.
authors.affiliation: Institut National de la Recherche Agronomique, UMR Biodiversité, Génes et Ecosystémes, F-33612 Cestas, France. petit@pierroton.inra.fr
authors.forename: Rémy  J
authors.initials: R
authors.lastname: Petit
authors.forename: Itziar
authors.initials: I
authors.lastname: Aguinagalde
authors.forename: Jacques-Louis
authors.initials: JL
authors.lastname: de Beaulieu
authors.forename: Christiane
authors.initials: C
authors.lastname: Bittkau
authors.forename: Simon
authors.initials: S
authors.lastname: Brewer
authors.forename: Rachid
authors.initials: R
authors.lastname: Cheddadi
authors.forename: Richard
authors.initials: R
authors.lastname: Ennos
authors.forename: Silvia
authors.initials: S
authors.lastname: Fineschi
authors.forename: Delphine
authors.initials: D
authors.lastname: Grivet
authors.forename: Martin
authors.initials: M
authors.lastname: Lascoux
authors.forename: Aparajita
authors.initials: A
authors.lastname: Mohanty
authors.forename: Gerhard
authors.initials: G
authors.lastname: Müller-Starck
authors.forename: Brigitte
authors.initials: B
authors.lastname: Demesure-Musch
authors.forename: Anna
authors.initials: A
authors.lastname: Palmé
authors.forename: Juan Pedro
authors.initials: JP
authors.lastname: Martín
authors.forename: Sarah
authors.initials: S
authors.lastname: Rendell
authors.forename: Giovanni G
authors.initials: GG
authors.lastname: Vendramin
mesh_terms: D018742:DNA, Chloroplast / Q000235:genetics*; D017753:Ecosystem; D005060:Europe; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D006239:Haplotypes; D019684:Magnoliopsida / Q000235:genetics*; D012639:Seeds; D013696:Temperature; D014197:Trees / Q000235:genetics*
chemical_list: D018742:DNA, Chloroplast