Pearl millet genomic vulnerability to climate change in West Africa highlights the need for regional collaboration

Rhone Bénédicte, Defrance Dimitri, Berthouly-Salazar Cécile, Mariac Cédric, Cubry Philippe, Couderc Marie, Dequincey Anaïs, Assoumane Aichatou, Kane Ndjido Ardo, Sultan Benjamin, Barnaud Adeline, Vigouroux Yves. 2020. Pearl millet genomic vulnerability to climate change in West Africa highlights the need for regional collaboration. Nature Communications, 11:5274, 9 p.

Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/?term=PRJNA422966 / Url - jeu de données - Entrepôt autre : https://zenodo.org/record/3970815#.X5Aks-06_IU

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Climate change is already affecting agro-ecosystems and threatening food security by reducing crop productivity and increasing harvest uncertainty. Mobilizing crop diversity could be an efficient way to mitigate its impact. We test this hypothesis in pearl millet, a nutritious staple cereal cultivated in arid and low-fertility soils in sub-Saharan Africa. We analyze the genomic diversity of 173 landraces collected in West Africa together with an extensive climate dataset composed of metrics of agronomic importance. Mapping the pearl millet genomic vulnerability at the 2050 horizon based on the current genomic-climate relationships, we identify the northern edge of the current areas of cultivation of both early and late flowering varieties as being the most vulnerable to climate change. We predict that the most vulnerable areas will benefit from using landraces that already grow in equivalent climate conditions today. However, such seed-exchange scenarios will require long distance and trans-frontier assisted migrations. Leveraging genetic diversity as a climate mitigation strategy in West Africa will thus require regional collaboration.

Mots-clés Agrovoc : Cenchrus americanus, adaptation aux changements climatiques, facteur climatique, résistance aux facteurs nuisibles, adaptation physiologique, génomique, phytogénétique, atténuation des effets du changement climatique, diversité génétique (comme ressource), rendement des cultures, collaboration, mil à chandelle, caractéristique génomique

Mots-clés géographiques Agrovoc : Afrique occidentale

Mots-clés complémentaires : Vulnérabilité

Mots-clés libres : Climate change adaptation, African agriculture, Genomics, Pearl millet

Classification Agris : F30 - Génétique et amélioration des plantes
P40 - Météorologie et climatologie

Champ stratégique Cirad : CTS 6 (2019-) - Changement climatique

Auteurs et affiliations

• Rhone Bénédicte, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-4198-622X - auteur correspondant
• Defrance Dimitri, Université de Montpellier (FRA)
• Berthouly-Salazar Cécile, IRD (FRA)
• Mariac Cédric, IRD (FRA)
• Cubry Philippe, IRD (FRA)
• Couderc Marie, IRD (FRA)
• Dequincey Anaïs, Université de Montpellier (FRA)
• Assoumane Aichatou, Université Abdou Moumouni (NER)
• Kane Ndjido Ardo, ISRA (SEN)
• Sultan Benjamin, IRD (FRA)
• Barnaud Adeline, IRD (FRA) - auteur correspondant
• Vigouroux Yves, IRD (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596801/)

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