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Stable Epigenetic Effects Impact Adaptation in Allopolyploid Orchids (Dactylorhiza: Orchidaceae)

Paun, Ovidiu; Bateman, Richard M.; Fay, Michael F.; Hedrén, Mikael LU ; Civeyrel, Laure and Chase, Mark W. (2010) In Molecular Biology and Evolution 27(11). p.2465-2473
Abstract
Epigenetic information includes heritable signals that modulate gene expression but are not encoded in the primary nucleotide sequence. We have studied natural epigenetic variation in three allotetraploid sibling orchid species (Dactylorhiza majalis s.str, D. traunsteineri s.l., and D. ebudensis) that differ radically in geography/ecology. The epigenetic variation released by genome doubling has been restructured in species-specific patterns that reflect their recent evolutionary history and have an impact on their ecology and evolution, hundreds of generations after their formation. Using two contrasting approaches that yielded largely congruent results, epigenome scans pinpointed epiloci under divergent selection that correlate with... (More)
Epigenetic information includes heritable signals that modulate gene expression but are not encoded in the primary nucleotide sequence. We have studied natural epigenetic variation in three allotetraploid sibling orchid species (Dactylorhiza majalis s.str, D. traunsteineri s.l., and D. ebudensis) that differ radically in geography/ecology. The epigenetic variation released by genome doubling has been restructured in species-specific patterns that reflect their recent evolutionary history and have an impact on their ecology and evolution, hundreds of generations after their formation. Using two contrasting approaches that yielded largely congruent results, epigenome scans pinpointed epiloci under divergent selection that correlate with eco-environmental variables, mainly related to water availability and temperature. The stable epigenetic divergence in this group is largely responsible for persistent ecological differences, which then set the stage for species-specific genetic patterns to accumulate in response to further selection and/or drift. Our results strongly suggest a need to expand our current evolutionary framework to encompass a complementary epigenetic dimension when seeking to understand population processes that drive phenotypic evolution and adaptation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
selection, polyploidy, hybridization, evolution, adaptation, epigenetics
in
Molecular Biology and Evolution
volume
27
issue
11
pages
2465 - 2473
publisher
Oxford University Press
external identifiers
  • wos:000283118000005
  • scopus:77958138570
ISSN
0737-4038
DOI
10.1093/molbev/msq150
language
English
LU publication?
yes
id
747bbabc-042a-43f0-9f95-dbffd3d019d2 (old id 1720693)
date added to LUP
2010-12-09 12:38:48
date last changed
2018-07-08 03:02:30
@article{747bbabc-042a-43f0-9f95-dbffd3d019d2,
  abstract     = {Epigenetic information includes heritable signals that modulate gene expression but are not encoded in the primary nucleotide sequence. We have studied natural epigenetic variation in three allotetraploid sibling orchid species (Dactylorhiza majalis s.str, D. traunsteineri s.l., and D. ebudensis) that differ radically in geography/ecology. The epigenetic variation released by genome doubling has been restructured in species-specific patterns that reflect their recent evolutionary history and have an impact on their ecology and evolution, hundreds of generations after their formation. Using two contrasting approaches that yielded largely congruent results, epigenome scans pinpointed epiloci under divergent selection that correlate with eco-environmental variables, mainly related to water availability and temperature. The stable epigenetic divergence in this group is largely responsible for persistent ecological differences, which then set the stage for species-specific genetic patterns to accumulate in response to further selection and/or drift. Our results strongly suggest a need to expand our current evolutionary framework to encompass a complementary epigenetic dimension when seeking to understand population processes that drive phenotypic evolution and adaptation.},
  author       = {Paun, Ovidiu and Bateman, Richard M. and Fay, Michael F. and Hedrén, Mikael and Civeyrel, Laure and Chase, Mark W.},
  issn         = {0737-4038},
  keyword      = {selection,polyploidy,hybridization,evolution,adaptation,epigenetics},
  language     = {eng},
  number       = {11},
  pages        = {2465--2473},
  publisher    = {Oxford University Press},
  series       = {Molecular Biology and Evolution},
  title        = {Stable Epigenetic Effects Impact Adaptation in Allopolyploid Orchids (Dactylorhiza: Orchidaceae)},
  url          = {http://dx.doi.org/10.1093/molbev/msq150},
  volume       = {27},
  year         = {2010},
}