SUNLAB: a Functional-Structral Model for Genotypic and Phenotypic Characterization of the Sunflower Crop

Fenni Kang (1) , Veronique Letort (1) , Hugo Magaldi (1) , Paul-Henry Cournède (1, 2) , Jérémie Lecoeur (3)

1 MAS - Mathématiques Appliquées aux Systèmes - EA 4037
2 DIGIPLANTE - Modélisation de la croissance et de l'architecture des plantes
3 Syngenta France

A new functional-structural model SUNLAB for the crop sunflower (Helianthus annuus L.) is developed. It is dedicated to simulate the organogenesis, morphogenesis, biomass accumulation and biomass partitioning to organs in sunflower growth. It is adapted to model phenotypic response to diverse environment factors including temperature stress and water deficiency, and adapted to different genotypic variants. The model is confronted to experimental data and estimated parameter values of two genotypes "Melody" and "Prodisol" are presented. SUNLAB parameters seem to show genotypic variability, which potentially makes the model an interesting intermediate to discriminate between genotypes. Statistical tests on estimated parameter values suggest that some parameters are common between genotypes and others are genotypic specific. Since SUNLAB simulate individual leaf area and biomass as two state variables, an interesting corollary is that it also simulates dynamically the specific leaf area (SLA) variable. Further studies are performed to evaluate model performances with more genotypes and more discriminating environments to test and expand model's adaptability and usability

Mots clés: Sunflo; Greenlab; Sunflower; Functional-structural model; Specific Leaf Area; Genotypic variability

Domaines: Systèmes dynamiques [math.DS]; Biologie végétale

Fenni Kang, Veronique Letort, Hugo Magaldi, Paul-Henry Cournède, Jérémie Lecoeur. SUNLAB: a Functional-Structral Model for Genotypic and Phenotypic Characterization of the Sunflower Crop. 2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications, Oct 2012, Shanghai, China. pp.148-151. ⟨hal-00781183⟩