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Next generation of elevated [CO2] experiments with crops: A critical investment for feeding the future world

Ainsworth Elizabeth A., Beier Claus, Calfapietra Carlo, Ceulemans Reinhart, Durand-Tardif Mylène, Farquhar Graham D., Godbold Douglas L., Hendrey George R., Hickler Thomas, Kaduk Jörg, Karnosky David F., Kimball Bruce A., Körner Christian, Koorneef Maarten, Lafarge Tanguy. 2008. Next generation of elevated [CO2] experiments with crops: A critical investment for feeding the future world. Plant, Cell and Environment, 31 (9) : 1317-1324.

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Résumé : A rising global population and demand for protein-rich diets are increasing pressure to maximize agricultural productivity. Rising atmospheric [CO2] is altering global temperature and precipitation patterns, which challenges agricultural productivity. While rising [CO2] provides a unique opportunity to increase the productivity of C3 crops, average yield stimulation observed to date is well below potential gains. Thus, there is room for improving productivity. However, only a fraction of available germplasm of crops has been tested for CO2 responsiveness. Yield is a complex phenotypic trait determined by the interactions of a genotype with the environment. Selection of promising genotypes and characterization of response mechanisms will only be effective if crop improvement and systems biology approaches are closely linked to production environments, that is, on the farm within major growing regions. Free air CO2 enrichment (FACE) experiments can provide the platform upon which to conduct genetic screening and elucidate the inheritance and mechanisms that underlie genotypic differences in productivity under elevated [CO2]. We propose a new generation of large-scale, low-cost per unit area FACE experiments to identify the most CO2-responsive genotypes and provide starting lines for future breeding programmes. This is necessary if we are to realize the potential for yield gains in the future.

Mots-clés Agrovoc : changement climatique, dioxyde de carbone, plante de culture, rendement des cultures, projet de recherche, politique de développement, génétique

Classification Agris : E14 - Économie et politique du développement
F30 - Génétique et amélioration des plantes
A50 - Recherche agronomique

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Ainsworth Elizabeth A., USDA (USA)
  • Beier Claus, Technical University of Denmark (DNK)
  • Calfapietra Carlo, IBAF (ITA)
  • Ceulemans Reinhart, University of Antwerp (BEL)
  • Durand-Tardif Mylène, INRA (FRA)
  • Farquhar Graham D., Research School of Biological Sciences (AUS)
  • Godbold Douglas L., School of Environment and Natural Resources (GBR)
  • Hendrey George R., School of Earth and Environmental Science and The Graduate Center (USA)
  • Hickler Thomas, Geobotanisches institut (CHE)
  • Kaduk Jörg, University of Leicester (GBR)
  • Karnosky David F., University of Michigan (USA)
  • Kimball Bruce A., USDA (USA)
  • Körner Christian, University of Basel (CHE)
  • Koorneef Maarten, Max Planck Institut für Biogeochemie (DEU)
  • Lafarge Tanguy, CIRAD-BIOS-UPR Peuplements de riz (PHL)

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Source : Cirad - Agritrop (https://agritrop.cirad.fr/545829/)

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