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Adaptative shift linked to climate change in a major sahelian crop

Vigouroux Yves, Gérard Bruno, Kapran Issoufou, Mamadou Aïssata, Sagnard Fabrice, Deu Monique, Chantereau Jacques, Ndjeunga Jupiter, Mariac Cédric, Pham Jean Louis, Bezançon Gilles. 2005. Adaptative shift linked to climate change in a major sahelian crop In : Abstracts of Plant and Animal Genomes XIIIth Conference, San Diego, CA (USA), January 15-19, 2005. s.l. : s.n., Résumé Plant and Animal Genomes Conference. 13, San Diego, États-Unis, 15 Janvier 2005/19 Janvier 2005.

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Résumé : Several trends indicate an increasing in average temperature at the world scale. If climate impacts plant and animal phenology, the consequences of such rapid climatic change on plant adaptation have rarely been investigated. Sahelian countries have experience a significant climatic shift to drier climate in the last 30 years. However, it is yet unclear if plant rapidly adapted to such climatic shift. One of the major cereal crops in Sahelian country is pearl millet. Pearl millet contributed to food security in the whole Sahelian region and cover more than 60% of the cultivated area in Niger. In this study, we analyzed samples collected in the exact same village across Niger in 1976 and 2003. Comparison of morphological traits in a common garden experiment shows a significant shift in adaptative traits: shorter cycle, reduction in plant and ear size. However, not noticeable change in term of gene diversity is observed. These results suggest a rapid adaptation of crops to climate change. This adaptation may mitigate climatic change impact; however such adaptation will also limit yield potential locally. (Texte intégral)

Classification Agris : F30 - Génétique et amélioration des plantes

Auteurs et affiliations

  • Vigouroux Yves, IRD (FRA)
  • Gérard Bruno, ICRISAT (NER)
  • Kapran Issoufou, INRAN (NER)
  • Mamadou Aïssata, INRAN (NER)
  • Sagnard Fabrice, CIRAD-FORET-UPR Ressources génétiques (MLI)
  • Deu Monique, CIRAD-AMIS-UMR PIA (FRA)
  • Chantereau Jacques, CIRAD-CA-UPR Agrobiodiversité en savane (FRA)
  • Ndjeunga Jupiter, ICRISAT (NER)
  • Mariac Cédric, IRD (FRA)
  • Pham Jean Louis, IRD (FRA)
  • Bezançon Gilles, IRD (FRA)

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Source : Cirad - Agritrop

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