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    Seascape genomics reveals candidate molecular targets of heat stress adaptation in three coral species

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    mec.15857.pdf
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    17.85Mb
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    Description:
    Accepted Article
    Embargo End Date:
    2022-02-22
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    Type
    Article
    Authors
    Selmoni, Oliver cc
    Lecellier, Gaël
    Magalon, Hélène cc
    Vigliola, Laurent
    Oury, Nicolas
    Benzoni, Francesca cc
    Peignon, Christophe
    Joost, Stéphane cc
    Berteaux-Lecellier, Véronique
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2021-02-22
    Embargo End Date
    2022-02-22
    Submitted Date
    2020
    Permanent link to this record
    http://hdl.handle.net/10754/667637
    
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    Abstract
    Anomalous heat waves are causing a major decline of hard corals around the world and threatening the persistence of coral reefs. There are, however, reefs that had been exposed to recurrent thermal stress over the years and whose corals appeared tolerant against heat. One of the mechanisms that could explain this phenomenon is local adaptation, but the underlying molecular mechanisms are poorly known. In this work, we applied a seascape genomics approach to study heat stress adaptation in three coral species of New Caledonia (southwestern Pacific) and to uncover molecular actors potentially involved. We used remote sensing data to characterize the environmental trends across the reef system, and sampled corals living at the most contrasted sites. These samples underwent next generation sequencing to reveal single nucleotide polymorphisms (SNPs) of which frequencies associated with heat stress gradients. As these SNPs might underpin an adaptive role, we characterized the functional roles of the genes located in their genomic region. In each of the studied species, we found heat stress associated SNPs located in proximity of genes involved in pathways well-known to contribute to the cellular responses against heat, such as protein folding, oxidative stress homeostasis, inflammatory and apoptotic pathways and DNA damage-repair. In some cases, the same candidate molecular targets of heat stress adaptation recurred among species. Together, these results underscore the relevance and the power of the seascape genomics approach for the discovery of adaptive traits that could allow corals to persist across wider thermal ranges.
    Citation
    Selmoni, O., Lecellier, G., Magalon, H., Vigliola, L., Oury, N., Benzoni, F., … Berteaux-Lecellier, V. (2021). Seascape genomics reveals candidate molecular targets of heat stress adaptation in three coral species. Molecular Ecology. doi:10.1111/mec.15857
    Publisher
    Wiley
    Journal
    Molecular Ecology
    DOI
    10.1111/mec.15857
    10.1101/2020.05.12.090050
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1111/mec.15857
    ae974a485f413a2113503eed53cd6c53
    10.1111/mec.15857
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division

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