Uniform selection as a primary force reducing population genetic differentiation of cavitation resistance across a species range - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue PLoS ONE Année : 2011

Uniform selection as a primary force reducing population genetic differentiation of cavitation resistance across a species range

Résumé

Background : Cavitation resistance to water stress-induced embolism determines plant survival during drought. This adaptive trait has been described as highly variable in a wide range of tree species, but little is known about the extent of genetic and phenotypic variability within species. This information is essential to our understanding of the evolutionary forces that have shaped this trait, and for evaluation of its inclusion in breeding programs. *Methodology : We assessed cavitation resistance (P50), growth and carbon isotope composition in six Pinus pinaster populations in a provenance and progeny trial. We estimated the heritability of cavitation resistance and compared the distribution of neutral markers (FST) and quantitative genetic differentiation (QST), for retrospective identification of the evolutionary forces acting on these traits. *Results/Discussion : In contrast to growth and carbon isotope composition, no population differentiation was found for cavitation resistance. Heritability was higher than for the other traits, with a low additive genetic variance (h2ns = 0.43±0.18, CVA = 4.4%). QST was significantly lower than FST, indicating uniform selection for P50, rather than genetic drift. Putative mechanisms underlying QST
Fichier principal
Vignette du fichier
40894_20110920104020085_1.pdf (450.3 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00964845 , version 1 (29-05-2020)

Identifiants

Citer

Jean-Baptiste J.-B. Lamy, Laurent Bouffier, Régis R. Burlett, Christophe Plomion, Hervé H. Cochard, et al.. Uniform selection as a primary force reducing population genetic differentiation of cavitation resistance across a species range. PLoS ONE, 2011, 6 (8), 12 p. ⟨10.1371/journal.pone.0023476⟩. ⟨hal-00964845⟩
67 Consultations
52 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More