The DELICAS project : model assisted phenotyping in sugarcane for the identification of marker-trait associations

Nibouche Samuel, Martiné Jean-François, Luquet Delphine, Gozé Eric, Rouan Lauriane, Costet Laurent, D'Hont Angélique, Soulie Jean-Christophe, Thong-Chane Audrey. 2010. The DELICAS project : model assisted phenotyping in sugarcane for the identification of marker-trait associations. In : Proceedings of Agro 2010 : the XIth ESA Congress, August 29th - September 3rd, 2010, Montpellier, France. Wery Jacques (ed.), Shili-Touzi I. (ed.), Perrin A. (ed.). Montpellier : Agropolis international, 541-542. ISBN 978-2-909613-01-7 ESA Congress. 11, Montpellier, France, 29 Août 2010/3 Septembre 2010.

Matériel d'accompagnement : 1 poster

Résumé : The ANR DELICAS project will address the problem faced in sugarcane for identifying molecular markers with a strong effect on traits of agronomic interest. The genetic control of cane and sugar yield traits in sugarcane typically involves numerous QTLs with small individual effects (Hoarau et al. 2002; Aitken et al. 2006). The lack of markers has been so far one of the most important constraints to a wider contribution of genomics to sugarcane breeding and for the development of marker assisted selection in this crop. Phenotypic traits for production potential interact strongly with the environment, and represent the outcome of multiple processes difficult to measure and to tag at the genetic level. Plant growth modelling can describe yield formation dynamically as a set of interactive equations using only a small number of genotypic parameters. The different parameters participating in phenotype expression can be considered as synthetic component traits, presumably controlled by fewer genes than the complex agronomic traits and can be expected to be closer to gene or QTL effects, in the sense that Genotype x Environment `noise' is reduced (Hammer et al. 2002, Dingkuhn et al. 2005). In such a `heuristic' approach, parameter variation among genotypes can be interpreted as an expression of allelic diversity, and analyzed accordingly in QTL or association studies. Model assisted phenotyping has been applied to maize (Reymond et al. 2003) or peach tree (Quilot et al. 2004). The DELICAS project, which associates the breeding company eRcane and Cirad, aims at identifying molecular markers associated with genes implied in the elaboration of sugarcane yield by using ecophysiological models. To achieve the objectives of the project, we will: (i) elaborate methods and tools for model assisted ecophysiological phenotyping of sugarcane, and (ii) phenotype a core collection with two ecophysiological models, Mosicas (Martine, 2003) and EcoMeristem (Luquet et al. 2006), and detect associations between genetic markers and model parameters.

Classification Agris : F30 - Génétique et amélioration des plantes
U10 - Informatique, mathématiques et statistiques
F01 - Culture des plantes

Auteurs et affiliations

• Nibouche Samuel, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0003-2675-1382
• Martiné Jean-François, CIRAD-PERSYST-UPR SCA (REU)
• Luquet Delphine, CIRAD-BIOS-UPR AIVA (FRA) ORCID: 0000-0002-2543-7140
• Gozé Eric, CIRAD-PERSYST-UPR SCA (FRA) ORCID: 0000-0001-9121-7835
• Rouan Lauriane, CIRAD-BIOS-UPR AIVA (FRA)
• Costet Laurent, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0003-3199-2885
• D'Hont Angélique, CIRAD-BIOS-UMR DAP (FRA)
• Soulie Jean-Christophe, CIRAD-BIOS-UPR AIVA (FRA) ORCID: 0000-0003-2904-9548
• Thong-Chane Audrey, eRcane (REU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/557318/)

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