Serveur d'exploration sur le peuplier

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Adaptation of tree growth to elevated CO2: quantitative trait loci for biomass in Populus.

Identifieur interne : 003C50 ( Main/Exploration ); précédent : 003C49; suivant : 003C51

Adaptation of tree growth to elevated CO2: quantitative trait loci for biomass in Populus.

Auteurs : Anne M. Rae [Royaume-Uni] ; Penny J. Tricker ; Stephen M. Bunn ; Gail Taylor

Source :

RBID : pubmed:17547667

Descripteurs français

English descriptors

Abstract

* Information on the genetic variation of plant response to elevated CO(2) (e[CO(2)]) is needed to understand plant adaptation and to pinpoint likely evolutionary response to future high atmospheric CO(2) concentrations. * Here, quantitative trait loci (QTL) for above- and below-ground tree growth were determined in a pedigree - an F(2) hybrid of poplar (Populus trichocarpa and Populus deltoides), following season-long exposure to either current day ambient CO(2) (a[CO(2)]) or e[CO(2)] at 600 microl l(-1), and genotype by environment interactions investigated. * In the F(2) generation, both above- and below-ground growth showed a significant increase in e[CO(2)]. Three areas of the genome on linkage groups I, IX and XII were identified as important in determining above-ground growth response to e[CO(2)], while an additional three areas of the genome on linkage groups IV, XVI and XIX appeared important in determining root growth response to e[CO(2)]. * These results quantify and identify genetic variation in response to e[CO(2)] and provide an insight into genomic response to the changing environment.

DOI: 10.1111/j.1469-8137.2007.02091.x
PubMed: 17547667


Affiliations:


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Le document en format XML

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<term>Carbon Dioxide (pharmacology)</term>
<term>Chromosome Mapping (MeSH)</term>
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<term>Dioxyde de carbone (métabolisme)</term>
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<term>Populus (effets des médicaments et des substances chimiques)</term>
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<div type="abstract" xml:lang="en">* Information on the genetic variation of plant response to elevated CO(2) (e[CO(2)]) is needed to understand plant adaptation and to pinpoint likely evolutionary response to future high atmospheric CO(2) concentrations. * Here, quantitative trait loci (QTL) for above- and below-ground tree growth were determined in a pedigree - an F(2) hybrid of poplar (Populus trichocarpa and Populus deltoides), following season-long exposure to either current day ambient CO(2) (a[CO(2)]) or e[CO(2)] at 600 microl l(-1), and genotype by environment interactions investigated. * In the F(2) generation, both above- and below-ground growth showed a significant increase in e[CO(2)]. Three areas of the genome on linkage groups I, IX and XII were identified as important in determining above-ground growth response to e[CO(2)], while an additional three areas of the genome on linkage groups IV, XVI and XIX appeared important in determining root growth response to e[CO(2)]. * These results quantify and identify genetic variation in response to e[CO(2)] and provide an insight into genomic response to the changing environment.</div>
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