Functional-structural plant modeling to support complex trait phenotyping: case of rice early vigour and drought tolerance using ecomeristem model

Luquet Delphine, Rebolledo Maria Camila, Soulie Jean-Christophe. 2012. Functional-structural plant modeling to support complex trait phenotyping: case of rice early vigour and drought tolerance using ecomeristem model. In : Plant growth modeling, simulation, visualization and applications. Proceedings PMA12 : The Fourth International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications, Shanghai, China, 31 October-3 November 2012. Kang Meng Zhen (ed.), Dumont Yves (ed.), Guo Yan (ed.). Piscataway : IEEE, 270-277. ISBN 978-1-4673-0068-1 International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications (PMA12). 4, Shanghai, Chine, 31 Octobre 2012/3 Novembre 2012.

Résumé : Early vigour and drought tolerance are essential for rice (Oryza sativa L .) crop establishment and final yield in rainfed, vegetative drought prone environments. However, recently, a negative linkage between these complex traits was pointed out within the rice genetic diversity, making the seedling performance under drought dependent on complex, dynamic trade-offs among several elemental traits difficult to separate experimentally. This study explored the way Ecomeristem, a FSPM of rice morphogenesis and phenotypic plasticity, can support the analysis of the genetic and environmental control of traits underlying rice genetic diversity in terms of early vigour and drought tolerance. Once validated, the model was calibrated for 176 genotypes within a diversity panel studied in a drought phenotyping, greenhouse experiment. Model parameters controlling early vigour were heritable and thus relevant for genetic studies. Parameters reproduced the negative linkages pointed out experimentally among vigour and drought tolerance traits and clustered genotypes consistently according to experimental results. The need to improve model formalisms regarding C assimilation and gas exchanges is pointed out. Opportunities and limits to support the phenotyping and genetic study of complex traits and the exploration of rice ideotypes for drought prone environments are discussed.

Classification Agris : U10 - Informatique, mathématiques et statistiques
F62 - Physiologie végétale - Croissance et développement
F50 - Anatomie et morphologie des plantes
F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Luquet Delphine, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-2543-7140
• Rebolledo Maria Camila
• Soulie Jean-Christophe, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-2904-9548

Source : Cirad - Agritrop (https://agritrop.cirad.fr/566407/)

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