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Adaptation of tree growth to elevated CO 2 : quantitative trait loci for biomass in Populus
Author(s) -
Rae Anne M.,
Tricker Penny J.,
Bunn Stephen M.,
Taylor Gail
Publication year - 2007
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2007.02091.x
Subject(s) - populus trichocarpa , biology , quantitative trait locus , adaptation (eye) , trait , biomass (ecology) , growing season , linkage (software) , genetic variation , genome , botany , gene , genetics , ecology , neuroscience , computer science , programming language
Summary• 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 µl 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.