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Pré-Publication, Document De Travail Année : 2021

Multiple adaptive solutions to face climatic constraints: novel insights in the debate over the role of convergence in local adaptation

Badr Benjelloun
Institut national de la recherche agronomique [Maroc]
Laboratoire d'Ecologie Alpine
Kevin Leempoel
Laboratoire des Systèmes d'Information Géographique [Lausanne]
Frédéric Boyer
  • Fonction : Auteur
Institut national de la recherche agronomique [Maroc]
Sylvie Stucki
Laboratoire des Systèmes d'Information Géographique [Lausanne]
Ian Streeter
European Bioinformatics Institute [Hinxton]
Pablo Orozco-Terwengel
Cardiff University
Florian Alberto
  • Fonction : Auteur
Laboratoire d'Ecologie Alpine
Bertrand Servin
Génétique Physiologie et Systèmes d'Elevage
CV
Filippo Biscarini
Adriana Alberti
Genoscope - Centre national de séquençage [Evry]
Stefan Engelen
  • Fonction : Auteur
  • PersonId : 1322751
  • IdHAL : sengelen
Genoscope - Centre national de séquençage [Evry]
Alessandra Stella
  • Fonction : Auteur
Licia Colli
Università cattolica del Sacro Cuore [Milano]
Eric Coissac
Laboratoire d'Ecologie Alpine
Michael Bruford
Cardiff University
Paolo Ajmone-Marsan
Università cattolica del Sacro Cuore [Milano]
Riccardo Negrini
Università cattolica del Sacro Cuore [Milano]
Laura Clarke
  • Fonction : Auteur
European Bioinformatics Institute [Hinxton]
Paul Flicek
European Bioinformatics Institute [Hinxton]
Abdelkader Chikhi
  • Fonction : Auteur
Institut national de la recherche agronomique [Maroc]
Stéphane Joost
Laboratoire des Systèmes d'Information Géographique [Lausanne]
Pierre Taberlet
Laboratoire d'Ecologie Alpine
François Pompanon
Laboratoire d'Ecologie Alpine

Résumé

Abstract The extent to which genomic convergence shapes locally adapted phenotypes in different species remains a fundamental question in evolutionary biology. To bring new insights to this debate we set up a framework which aimed to compare the adaptive trajectories of two domesticated mammal species co-distributed in diversified landscapes. We sequenced the genomes of 160 sheep and 161 goats extensively managed along environmental gradients, including temperature, rainfall, seasonality and altitude, to identify genes and biological processes shaping local adaptation. Allele frequencies at adaptive loci were rarely found to vary gradually along environmental gradients, but rather displayed a discontinuous shift at the extremities of environmental clines. Of the more than 430 adaptive genes identified, only 6 were orthologous between sheep and goats and those responded differently to environmental pressures, suggesting different adaptive mechanisms in these two closely related species. Such diversity of adaptive pathways may result from a high number of biological functions involved in adaptation to multiple eco-climatic gradients, and provides more arguments for the role of contingency and stochasticity in adaptation rather than repeatability.

Domaines

Sciences du Vivant [q-bio]

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https://hal.inrae.fr/hal-04186277

Soumis le : mercredi 23 août 2023-15:52:18

Dernière modification le : samedi 27 avril 2024-03:09:38

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hal-04186277 , version 1 (23-08-2023)

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Badr Benjelloun, Kevin Leempoel, Frédéric Boyer, Sylvie Stucki, Ian Streeter, et al.. Multiple adaptive solutions to face climatic constraints: novel insights in the debate over the role of convergence in local adaptation. 2023. ⟨hal-04186277⟩

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