Genetic basis of adaptation in Arabidopsis thaliana: local adaptation at the seed dormancy QTL DOG1.

Détails

ID Serval
serval:BIB_4733FA7E58F4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genetic basis of adaptation in Arabidopsis thaliana: local adaptation at the seed dormancy QTL DOG1.
Périodique
Evolution
Auteur(s)
Kronholm I., Picó F.X., Alonso-Blanco C., Goudet J., de Meaux J.
ISSN
1558-5646 (Electronic)
ISSN-L
0014-3820
Statut éditorial
Publié
Date de publication
2012
Volume
66
Numéro
7
Pages
2287-2302
Langue
anglais
Résumé
Local adaptation provides an opportunity to study the genetic basis of adaptation and investigate the allelic architecture of adaptive genes. We study delay of germination 1 (DOG1), a gene controlling natural variation in seed dormancy in Arabidopsis thaliana and investigate evolution of dormancy in 41 populations distributed in four regions separated by natural barriers. Using F(ST) and Q(ST) comparisons, we compare variation at DOG1 with neutral markers and quantitative variation in seed dormancy. Patterns of genetic differentiation among populations suggest that the gene DOG1 contributes to local adaptation. Although Q(ST) for seed dormancy is not different from F(ST) for neutral markers, a correlation with variation in summer precipitation supports that seed dormancy is adaptive. We characterize dormancy variation in several F(2) -populations and show that a series of functionally distinct alleles segregate at the DOG1 locus. Theoretical models have shown that the number and effect of alleles segregatin at quantitative trait loci (QTL) have important consequences for adaptation. Our results provide support to models postulating a large number of alleles at quantitative trait loci involved in adaptation.
Mots-clé
Adaptation, Physiological, Alleles, Arabidopsis/genetics, Arabidopsis Proteins/genetics, Asia, Central, Environment, Europe, Genetic Variation, Molecular Sequence Data, Phenotype, Polymerase Chain Reaction, Quantitative Trait Loci, Seed Dormancy
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/01/2013 17:26
Dernière modification de la notice
08/05/2019 17:59
Données d'usage