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

Dorothy A Steane; Brad M Potts; Elizabeth McLean; Suzanne M Prober; William D Stock; R E Vaillancourt; Margaret Byrne

doi:10.1111/mec.12751

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

Journal article

Open access

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

Dorothy A Steane, Brad M Potts, Elizabeth McLean, Suzanne M Prober, William D Stock, R E Vaillancourt and Margaret Byrne

Molecular Ecology, Vol.23(10), pp.2500-2513

2014

DOI: https://doi.org/10.1111/mec.12751

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Abstract

eucalyptus

genome-wide scan

outlier analysis

Canonical Analysis of Principal Coordinates

assisted migration

climate-resilience

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.

Details

Title: Genome-wide scans detect adaptation to aridity in a widespread forest tree species
Authors: Dorothy A Steane (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Brad M Potts (Author) - University of Tasmania
Elizabeth McLean (Author) - Department of Parks and Wildlife, Western Australia
Suzanne M Prober (Author) - CSIRO Ecosystem Sciences
William D Stock (Author) - Edith Cowan University
R E Vaillancourt (Author) - University of Tasmania
Margaret Byrne (Author) - Department of Parks and Wildlife, Western Australia
Publication details: Molecular Ecology, Vol.23(10), pp.2500-2513
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2014
DOI: 10.1111/mec.12751
ISSN: 0962-1083
Copyright note: Copyright © 2014 Wiley-Blackwell Publishing Ltd. This is the accepted version of the following article: Steane, D. A., Potts, B. M., McLean, E., Prober, S. M., Stock, W. D., Vaillancourt, R. E. and Byrne, M. (2014), Genome-wide scans detect adaptation to aridity in a widespread forest tree species. Molecular Ecology, 23: 2500-2513. doi: 10.1111/mec.12751, which has been published in final form at http://dx.doi.org/10.1111/mec.12751
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448983202621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Biochemistry & Molecular Biology; Ecology; Evolutionary Biology