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Population genomics of parallel evolution in gene expression and gene sequence during ecological adaptation

Rivas, María José; Saura, María; Pérez-Figueroa, Andrés; Panova, Marina; Johansson, Tomas LU ; André, Carl; Caballero, Armando; Rolán-Alvarez, Emilio; Johannesson, Kerstin and Quesada, Humberto (2018) In Scientific Reports 8(1).
Abstract

Natural selection often produces parallel phenotypic changes in response to a similar adaptive challenge. However, the extent to which parallel gene expression differences and genomic divergence underlie parallel phenotypic traits and whether they are decoupled or not remains largely unexplored. We performed a population genomic study of parallel ecological adaptation among replicate ecotype pairs of the rough periwinkle (Littorina saxatilis) at a regional geographical scale (NW Spain). We show that genomic changes underlying parallel phenotypic divergence followed a complex pattern of both repeatable differences and of differences unique to specific ecotype pairs, in which parallel changes in expression or sequence are restricted to a... (More)

Natural selection often produces parallel phenotypic changes in response to a similar adaptive challenge. However, the extent to which parallel gene expression differences and genomic divergence underlie parallel phenotypic traits and whether they are decoupled or not remains largely unexplored. We performed a population genomic study of parallel ecological adaptation among replicate ecotype pairs of the rough periwinkle (Littorina saxatilis) at a regional geographical scale (NW Spain). We show that genomic changes underlying parallel phenotypic divergence followed a complex pattern of both repeatable differences and of differences unique to specific ecotype pairs, in which parallel changes in expression or sequence are restricted to a limited set of genes. Yet, the majority of divergent genes were divergent either for gene expression or coding sequence, but not for both simultaneously. Overall, our findings suggest that divergent selection significantly contributed to the process of parallel molecular differentiation among ecotype pairs, and that changes in expression and gene sequence underlying phenotypic divergence could, at least to a certain extent, be considered decoupled processes.

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organization
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Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
8
issue
1
publisher
Nature Publishing Group
external identifiers
  • scopus:85055907473
ISSN
2045-2322
DOI
10.1038/s41598-018-33897-8
language
English
LU publication?
yes
id
5d11a291-74ac-4e25-b99b-b00f03835a2e
date added to LUP
2018-11-14 14:24:34
date last changed
2019-02-20 11:35:50
@article{5d11a291-74ac-4e25-b99b-b00f03835a2e,
  abstract     = {<p>Natural selection often produces parallel phenotypic changes in response to a similar adaptive challenge. However, the extent to which parallel gene expression differences and genomic divergence underlie parallel phenotypic traits and whether they are decoupled or not remains largely unexplored. We performed a population genomic study of parallel ecological adaptation among replicate ecotype pairs of the rough periwinkle (Littorina saxatilis) at a regional geographical scale (NW Spain). We show that genomic changes underlying parallel phenotypic divergence followed a complex pattern of both repeatable differences and of differences unique to specific ecotype pairs, in which parallel changes in expression or sequence are restricted to a limited set of genes. Yet, the majority of divergent genes were divergent either for gene expression or coding sequence, but not for both simultaneously. Overall, our findings suggest that divergent selection significantly contributed to the process of parallel molecular differentiation among ecotype pairs, and that changes in expression and gene sequence underlying phenotypic divergence could, at least to a certain extent, be considered decoupled processes.</p>},
  articleno    = {16147},
  author       = {Rivas, María José and Saura, María and Pérez-Figueroa, Andrés and Panova, Marina and Johansson, Tomas and André, Carl and Caballero, Armando and Rolán-Alvarez, Emilio and Johannesson, Kerstin and Quesada, Humberto},
  issn         = {2045-2322},
  language     = {eng},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {Population genomics of parallel evolution in gene expression and gene sequence during ecological adaptation},
  url          = {http://dx.doi.org/10.1038/s41598-018-33897-8},
  volume       = {8},
  year         = {2018},
}