University Of Tasmania

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Genome-wide scans detect adaptation to aridity in a widespread forest tree species

journal contribution
posted on 2023-05-18, 00:56 authored by Dorothy SteaneDorothy Steane, Bradley PottsBradley Potts, McLean, E, Prober, SM, Stock, WD, Rene VaillancourtRene Vaillancourt, Byrne, M
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.


Department of Climate Change and Energy Efficiency


Publication title

Molecular Ecology










School of Natural Sciences


Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

Copyright 2014 John Wiley & Sons Ltd

Repository Status

  • Restricted

Socio-economic Objectives

Native forests