Convergence and divergence during the adaptation to similar environments by an Australian groundsel

Roda, Federico, Liu, Huanle, Wilkinson, Melanie J., Walter, Gregory M., James, Maddie E., Bernal, Diana M., Melo, Maria C., Lowe, Andrew, Rieseberg, Loren H., Prentis, Peter and Ortiz-Barrientos, Daniel (2013) Convergence and divergence during the adaptation to similar environments by an Australian groundsel. Evolution, 67 9: 2515-2529. doi:10.1111/evo.12136


Author Roda, Federico
Liu, Huanle
Wilkinson, Melanie J.
Walter, Gregory M.
James, Maddie E.
Bernal, Diana M.
Melo, Maria C.
Lowe, Andrew
Rieseberg, Loren H.
Prentis, Peter
Ortiz-Barrientos, Daniel
Title Convergence and divergence during the adaptation to similar environments by an Australian groundsel
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2013-09
Sub-type Article (original research)
DOI 10.1111/evo.12136
Volume 67
Issue 9
Start page 2515
End page 2529
Total pages 15
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell
Collection year 2014
Language eng
Abstract Adaptation to replicate environments is often achieved through similar phenotypic solutions. Whether selection also produces convergent genomic changes in these situations remains largely unknown. The variable groundsel, Senecio lautus, is an excellent system to investigate the genetic underpinnings of convergent evolution, because morphologically similar forms of these plants have adapted to the same environments along the coast of Australia. We compared range-wide patterns of genomic divergence in natural populations of this plant and searched for regions putatively affected by natural selection. Our results indicate that environmental adaptation followed complex genetic trajectories, affecting multiple loci, implying both the parallel recruitment of the same alleles and the divergence of completely different genomic regions across geography. An analysis of the biological functions of candidate genes suggests that adaptation to coastal environments may have occurred through the recruitment of different genes participating in similar processes. The relatively low genetic convergence that characterizes the parallel evolution of S. lautus forms suggests that evolution is more constrained at higher levels of biological organization.
Keyword Adaptation
Convergence
Evolutionary genomics
Senecio
Selection natural
Speciation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
 
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