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Investigating the Influence of Geometrical Traits on Light Interception Efficiency of Apple Trees: a Modelling Study with MAppleT

Liqi Han 1 Evelyne Costes 1, * Frédéric Boudon 2, 3 Thomas Cokelaer 3 Christophe Pradal 2, 3 David da Silva 4 Robert Faivre 5
* Corresponding author
1 AFEF - Architecture et Fonctionnement des Espèces Fruitières [AGAP]
UMR AGAP - Amélioration génétique et adaptation des plantes méditerranéennes et tropicales
3 VIRTUAL PLANTS - Modeling plant morphogenesis at different scales, from genes to phenotype
UMR AGAP - Amélioration génétique et adaptation des plantes méditerranéennes et tropicales, INRA - Institut National de la Recherche Agronomique, CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : MAppleT is an in silico functional-structural plant model that has been built for simulating architectural development of apple trees. It has the capability of representing tree growth within a virtual space where the development of individual organs depends on geometrical traits. The purpose of this research is to investigate the influence of apple trees x architectural variability on their light interception efficiency. The STAR, namely the silhouette to total area ratio, of leaves, was chosen to evaluate the level of such efficiency. The strategy is to integrate MAppleT with the light interception model provided by the fractalysis module of the VPlants software library. Target values of four major traits (internode length, leaf area, branching angle and top shoot diameter), are varied in range previously observed in a segregating population of apple hybrids. A sensitivity analysis based on polynomial and generalised additive models was performed for highlighting the most influential trait on light interception and suggesting the optimal combination(s) of traits leading to the highest STAR. The contribution of stochastic processes that pilot tree topology in MAppleT is also investigated in the sensitivity analysis. This study not only provides a time- and resource-saving alternative for data collection, but also sets a methodology for ideotype definition and further genetic improvement of apple trees.
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  • HAL Id : hal-00790650, version 1
  • PRODINRA : 182871

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Liqi Han, Evelyne Costes, Frédéric Boudon, Thomas Cokelaer, Christophe Pradal, et al.. Investigating the Influence of Geometrical Traits on Light Interception Efficiency of Apple Trees: a Modelling Study with MAppleT. International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications, Oct 2012, Shangai, China. pp.152-159. ⟨hal-00790650⟩

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