School or Research Centre
Centre for Ecosystem Management
Patterns of adaptive variation within plant species are best studied through common garden experiments, but these are costly and time-consuming, especially for trees that have long generation times. We explored whether genome-wide scanning technology combined with outlier marker detection could be used to detect adaptation to climate and provide an alternative to common garden experiments. As a case study, we sampled nine provenances of the widespread forest tree species, Eucalyptus tricarpa, across an aridity gradient in southeastern Australia. Using a Bayesian analysis we identified a suite of 94 putatively adaptive (outlying) sequence-tagged markers across the genome. Population-level allele frequencies of these outlier markers were strongly correlated with temperature and moisture availability at the site of origin, and with population differences in functional traits measured in two common gardens. Using the output from a canonical analysis of principal coordinates we devised a metric that provides a holistic measure of genomic adaptation to aridity that could be used to guide assisted migration or genetic augmentation.
This dataset was originally published at:
Molecular, climate and functional trait data for Eucalyptus tricarpa
See ReadMe file.
Creative Commons License
This work is licensed under a Creative Commons Public Domain Dedication 1.0 License.
Steane, D. A., Potts, B. M., McClean, E., Prober, S. M., Stock, W. D., Vaillancourt, R. E., & Byrne, M. (2015). Genome-wide scans detect adaptation to aridity in a widespread forest tree species. Dryad. Retrieved from https://ro.ecu.edu.au/datasets/81