NapierLafontaineHu2020

Référence

Napier, J.D., de Lafontaine, G., Hu, F.S. (2020) Exploring genomic variation associated with drought stress in Picea mariana populations. Ecology and Evolution, 10(17):9271-9282. (Scopus )

Résumé

Predicted increases in drought and heat stress will likely induce shifts in species bioclimatic envelopes. Genetic variants adapted to water limitation may prove pivotal for species response under scenarios of increasing drought. In this study, we aimed to explore this hypothesis by investigating genetic variation in 16 populations of black spruce (Picea mariana) in relation to climate variables in Alaska. A total of 520 single nucleotide polymorphisms (SNPs) were genotyped for 158 trees sampled from areas of contrasting climate regimes. We used multivariate and univariate genotype-by-environment approaches along with available gene annotations to investigate the relationship between climate and genetic variation among sampled populations. Nine SNPs were identified as having a significant association with climate, of which five were related to drought stress response. Outlier SNPs with respect to the overall environment were significantly overrepresented for several biological functions relevant for coping with variable hydric regimes, including osmotic stress response. This genomic imprint is consistent with local adaptation of black spruce to drought stress. These results suggest that natural selection acting on standing variation prompts local adaptation in forest stands facing water limitation. Improved understanding of possible adaptive responses could inform our projections about future forest dynamics and help prioritize populations that harbor valuable genetic diversity for conservation. © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd

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@ARTICLE { NapierLafontaineHu2020,
    AUTHOR = { Napier, J.D. and de Lafontaine, G. and Hu, F.S. },
    JOURNAL = { Ecology and Evolution },
    TITLE = { Exploring genomic variation associated with drought stress in Picea mariana populations },
    YEAR = { 2020 },
    NOTE = { cited By 0 },
    NUMBER = { 17 },
    PAGES = { 9271-9282 },
    VOLUME = { 10 },
    ABSTRACT = { Predicted increases in drought and heat stress will likely induce shifts in species bioclimatic envelopes. Genetic variants adapted to water limitation may prove pivotal for species response under scenarios of increasing drought. In this study, we aimed to explore this hypothesis by investigating genetic variation in 16 populations of black spruce (Picea mariana) in relation to climate variables in Alaska. A total of 520 single nucleotide polymorphisms (SNPs) were genotyped for 158 trees sampled from areas of contrasting climate regimes. We used multivariate and univariate genotype-by-environment approaches along with available gene annotations to investigate the relationship between climate and genetic variation among sampled populations. Nine SNPs were identified as having a significant association with climate, of which five were related to drought stress response. Outlier SNPs with respect to the overall environment were significantly overrepresented for several biological functions relevant for coping with variable hydric regimes, including osmotic stress response. This genomic imprint is consistent with local adaptation of black spruce to drought stress. These results suggest that natural selection acting on standing variation prompts local adaptation in forest stands facing water limitation. Improved understanding of possible adaptive responses could inform our projections about future forest dynamics and help prioritize populations that harbor valuable genetic diversity for conservation. © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd },
    AFFILIATION = { Department of Plant Biology, University of Illinois, Urbana, IL, United States; Department of Integrative Biology, The University of Texas at Austin, Austin, TX, United States; Canada Research Chair in Integrative Biology of Northern Flora, Université du Québec à Rimouski, Rimouski, QC, Canada; Department of Geology, University of Illinois, Urbana, IL, United States; Department of Biology, Washington University, St. Louis, MO, United States; Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, United States },
    AUTHOR_KEYWORDS = { Alaska; drought; genotype–environment associations; local adaptation; Picea mariana },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1002/ece3.6614 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088976579&doi=10.1002%2fece3.6614&partnerID=40&md5=104c4cdd0bf349a0b878fab8458f0eba },
}

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