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The pulse of the tree is under genetic control: eucalyptus as a case study

hal.structure.identifierAmélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
hal.structure.identifierDépartement Systèmes Biologiques [Cirad-BIOS]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBARTHOLOMÉ, Jérôme
hal.structure.identifierCentre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (Dispositif en Partenariat) [CRDPI]
dc.contributor.authorMABIALA, A.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, R.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBERT, Didier
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLEPLÉ, Jean-Charles
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPLOMION, Christophe
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierDépartement Systèmes Biologiques [Cirad-BIOS]
hal.structure.identifierAmélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
dc.contributor.authorGION, J‐m.
dc.date.issued2020-03-06
dc.identifier.issn0960-7412
dc.description.abstractEnThe pulse of the tree (diurnal cycle of stem radius fluctuations) has been widely studied as a way of analyzing tree responses to the environment, including the phenotypic plasticity of tree-water relationships in particular. However, the genetic basis of this daily phenotype and its interplay with the environment remain largely unexplored. We characterized the genetic and environmental determinants of this response, by monitoring daily stem radius fluctuation (dSRF) on 210 trees from a Eucalyptus urophylla x E. grandis full-sib family over 2 years. The dSRF signal was broken down into hydraulic capacitance, assessed as the daily amplitude of shrinkage (DA), and net growth, estimated as the change in maximum radius between two consecutive days (Delta R). The environmental determinants of these two traits were clearly different: DA was positively correlated with atmospheric variables relating to water demand, while Delta R was associated with soil water content. The heritability for these two traits ranged from low to moderate over time, revealing a time-dependent or environment-dependent complex genetic determinism. We identified 686 and 384 daily quantitative trait loci (QTL) representing 32 and 31 QTL regions for DA and Delta R, respectively. The identification of gene networks underlying the 27 major genomics regions for both traits generated additional hypotheses concerning the biological mechanisms involved in response to water demand and supply. This study highlights that environmentally induced changes in daily stem radius fluctuation are genetically controlled in trees and suggests that these daily responses integrated over time shape the genetic architecture of mature traits.
dc.language.isoen
dc.publisherWiley
dc.subject.enDaily stem radius fluctuations
dc.subject.enQTL quantitative trait loci
dc.subject.enQTL-by-environment interaction
dc.subject.enPhenotypic plasticity
dc.subject.enDiurnal cycle
dc.subject.enHeritability
dc.subject.enGene network
dc.subject.enEucalyptus
dc.subject.enDendrometer
dc.title.enThe pulse of the tree is under genetic control: eucalyptus as a case study
dc.typeArticle de revue
dc.identifier.doi10.1111/tpj.14734
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
dc.subject.halSciences de l'environnement/Environnement et Société
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.journalPlant Journal
bordeaux.page1-19
bordeaux.peerReviewedoui
hal.identifierhal-02555321
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02555321v1
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