Adaptation of tree growth to elevated CO2: quantitative trait loci for biomass in Populus.
* 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.
Rae
Anne M
AM
School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton S016 7PX, UK.
Tricker
Penny J
PJ
School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton S016 7PX, UK.
Bunn
Stephen M
SM
School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton S016 7PX, UK.
Taylor
Gail
G
School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton S016 7PX, UK.
D000064:Acclimatization; D018533:Biomass; D002245:Carbon Dioxide / Q000378:metabolism* / Q000494:pharmacology; D002874:Chromosome Mapping; D014644:Genetic Variation; D010375:Pedigree; D018517:Plant Roots / Q000187:drug effects / Q000235:genetics / Q000254:growth & development; D018547:Plant Stems / Q000187:drug effects / Q000235:genetics / Q000254:growth & development; D032107:Populus / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development; D040641:Quantitative Trait Loci
D002245:Carbon Dioxide