ISHS Acta Horticulturae 584: VI International Symposium on Computer Modelling in Fruit Research and Orchard Management
COMPARISON OF PEACH GENOTYPES USING AN ECOPHYSIOLOGICAL MODEL. APPLICATION TO FRUIT DRY MASS GROWTH |
| Authors: | B. Quilot, M. Génard, F. Lescourret, J. Kervella |
| Keywords: | fruit growth, ecophysiology, variations, genotypes, peach, modeling |
| Abstract:
Fruit mass is a complex character resulting from many processes under the control of both genome and environment. To reduce complexity a decomposition of such a complex character into ‘sub-characters’ appears relevant. For this aim, we used an ecophysiological model of peach fruit growth in dry mass. It simulated carbon partitioning at the shoot bearing fruit level. We characterized the fruit growth of a peach cultivar, a related wild species of low agronomic value and one of their hybrid offspring. Experimental measurements showed great genotypic variability of fruit mass at maturity, fruit growth and source activity. From the measurements we identified the model parameters for each genotype. The model allowed simulation of functioning of the genotypes and accounted for genotypic variation of fruit growth. The model was used to identify the main processes explaining fruit growth variability among the genotypes studied. Finally, we discussed the use of this approach to perform a QTL analysis of the main processes stemming from models rather than of a complex character. | |
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