BARTHOLOMÉ, Jérôme; MABIALA, André; SAVELLI, Bruno; BERT, Didier; BRENDEL, Oliver; PLOMION, Christophe; GION, Jean-Marc

doi:10.1111/nph.13301

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BARTHOLOMÉ, Jérôme
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
Biodiversité, Gènes & Communautés [BioGeCo]

MABIALA, André
Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (Dispositif en Partenariat) [CRDPI]

SAVELLI, Bruno
Laboratoire de Recherche en Sciences Végétales [LRSV]

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Article de revue

Ce document a été publié dans

New Phytologist. 2015, vol. 206, n° 4, p. 1437 - 1449

Wiley

Résumé en anglais

In the context of climate change, the water-use efficiency (WUE) of highly productive tree varieties, such as eucalypts, has become a major issue for breeding programmes. This study set out to dissect the genetic architecture of carbon isotope composition (C-13), a proxy of WUE, across several environments. A family of Eucalyptus urophyllaxE.grandis was planted in three trials and phenotyped for C-13 and growth traits. High-resolution genetic maps enabled us to target genomic regions underlying C-13 quantitative trait loci (QTLs) on the E.grandis genome. Of the 15 QTLs identified for C-13, nine were stable across the environments and three displayed significant QTL-by-environment interaction, suggesting medium to high genetic determinism for this trait. Only one colocalization was found between growth and C-13. Gene ontology (GO) term enrichment analysis suggested candidate genes related to foliar C-13, including two involved in the regulation of stomatal movements. This study provides the first report of the genetic architecture of C-13 and its relation to growth in Eucalyptus. The low correlations found between the two traits at phenotypic and genetic levels suggest the possibility of improving the WUE of Eucalyptus varieties without having an impact on breeding for growth.< Réduire

Mots clés en anglais

carbon isotope composition (C-13)

Eucalyptus

gene ontology (GO)

growth

QTL mapping

water-use efficiency (WUE)

DOI

http://dx.doi.org/10.1111/nph.13301

Project ANR

Amélioration des propriétés du bois chez l'Eucalyptus et le peuplier pour les bioenergies - ANR-10-KBBE-0007
Analyse du déterminisme génétique et environnemental de l'efficacité d'utilisation de l'eau pour améliorer la durabilité des plantations forestières - ANR-13-ADAP-0012

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202