CAIGNARD, Thomas; DELZON, Sylvain; BODENES, Catherine; DENCAUSSE, Benjamin; KREMER, Antoine

doi:10.1007/s11295-018-1309-2

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CAIGNARD, Thomas
Biodiversité, Gènes & Communautés [BioGeCo]

DELZON, Sylvain
Biodiversité, Gènes & Communautés [BioGeCo]

BODENES, Catherine
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

Tree Genetics and Genomes. 2019, vol. 15, n° 1, p. 1-12

Springer Verlag

Résumé en anglais

Reproduction, one of the main components of plant fitness, is highly variable in response to environmental cues, but little is known about the genetic determinism underlying reproduction-related traits in forest tree species. There is therefore an urgent need to characterize the genetic architecture of those traits if we are to predict the evolutionary trajectories of forest populations facing rapidly changing environment and mitigate their impacts. Using a full-sib family of pedunculate oak (Quercus robur), we investigated the within population variability of seed production and mean seed mass during four consecutive years. Reproductive traits were highly variable between trees and between years. The high narrow sense heritability and evolvability estimated underline the important genetic effect on the variability in seed production and mean seed mass. Despite a large variability over years, reproductive traits show significant genetic correlation between years. Furthermore, for the first time in forest tree species, quantitative trait loci (QTLs) associated with seed production and mean mass of a seed have been identified. While it is commonly assumed and observed that fitness traits have low narrow sense heritabilities, our findings show that reproduction-related traits may undergo evolutionary changes under selective pressure and may be determinant for tree adaptation.< Réduire

Mots clés

QTLs

quercus robur

Mots clés en anglais

tree reproduction

seed production

fitness

heritability

DOI

http://dx.doi.org/10.1007/s11295-018-1309-2

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202