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

Citation

Steane, DA and Potts, BM and McLean, E and Prober, SM and Stock, WD and Vaillancourt, RE and Byrne, M, Genome-wide scans detect adaptation to aridity in a widespread forest tree species, Molecular Ecology, 23, (10) pp. 2500-2513. ISSN 0962-1083 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 John Wiley & Sons Ltd

DOI: doi:10.1111/mec.12751

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:assisted migration, canonical analysis of principal coordinates, climate resilience, Eucalyptus, genome-wide scan, outlier analysis
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Population, Ecological and Evolutionary Genetics
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Native Forests
Author:Steane, DA (Dr Dorothy Steane)
Author:Potts, BM (Professor Brad Potts)
Author:Vaillancourt, RE (Professor Rene Vaillancourt)
ID Code:91525
Year Published:2014
Web of Science® Times Cited:30
Deposited By:Plant Science
Deposited On:2014-05-21
Last Modified:2017-11-01
Downloads:0

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