Adaptation of tree growth to elevated CO2: quantitative trait loci for biomass in Populus
Article first published online: 4 JUN 2007
Volume 175, Issue 1, pages 59–69, July 2007
How to Cite
Rae, A. M., Tricker, P. J., Bunn, S. M. and Taylor, G. (2007), Adaptation of tree growth to elevated CO2: quantitative trait loci for biomass in Populus. New Phytologist, 175: 59–69. doi: 10.1111/j.1469-8137.2007.02091.x
- Issue published online: 4 JUN 2007
- Article first published online: 4 JUN 2007
- Received: 13 December 2006 Accepted: 7 March 2007
- elevated CO2;
- quantitative trait loci (QTL);
- root growth;
- stem growth.
- • Information on the genetic variation of plant response to elevated CO2 (e[CO2]) is needed to understand plant adaptation and to pinpoint likely evolutionary response to future high atmospheric CO2 concentrations.
- • Here, quantitative trait loci (QTL) for above- and below-ground tree growth were determined in a pedigree – an F2 hybrid of poplar (Populus trichocarpa and Populus deltoides), following season-long exposure to either current day ambient CO2 (a[CO2]) or e[CO2] at 600 µl l−1, and genotype by environment interactions investigated.
- • In the F2 generation, both above- and below-ground growth showed a significant increase in e[CO2]. Three areas of the genome on linkage groups I, IX and XII were identified as important in determining above-ground growth response to e[CO2], while an additional three areas of the genome on linkage groups IV, XVI and XIX appeared important in determining root growth response to e[CO2].
- • These results quantify and identify genetic variation in response to e[CO2] and provide an insight into genomic response to the changing environment.