E Version définitive du manuscrit publié dans / Final version of the manuscript published in : The Journal of Agricultural Science, 2011, DOI: 101017/S0021859611000438 Manuscrit d’auteur / Author manuscript Manuscrit d’auteur / Author manuscript Manuscrit d’auteur / Author manuscript CROPS & SOILS RESEARCH PAPER * To whom all correspondence should be addressed. E-mail: bhwu@ibcas.ac.cn Application of a SUGAR model to analyse sugar accumulation in peach cultivars that differ in glucose-fructose ratio Short title: Analysis of sugar accumulation in peaches B. H. WU 1,* , B. QUILOT 2 , M. GÉNARD 3 , S. H. LI 1 , J. B. ZHAO 4 , J. YANG 1 AND Y. Q. WANG 1 1 Institute of Botany, Chinese Academy of Sciences, 100093 Beijing, China 2 UR1052, Génétique et Amélioration des Fruits et Légumes, INRA, BP 94, 84143 Montfavet, France 3 UR1115 Plantes et Systèmes de culture Horticoles, INRA, F-84000 Avignon, France 4 Institute of Forestry and Fruit, Beijing Academy of Agriculture and Forestry Sciences, 100094 Beijing, China (Received 7 June 2010, revised 25 November 2010 & 23 February 2011, accepted 24 March 2011) SUMMARY A SUGAR model, which was established to predict the partitioning of carbon into sucrose, glucose, fructose and sorbitol in fruit mesocarp of peach cultivars (Prunus persica (L.) Batch) with normal glucose:fructose ratio (G:F) of 0.8–1.5, was evaluated and extended for peach cultivars with a high G:F ratio of 1.5–7.8. The extended model (SUGARb) is more generic and assumes a high G:F ratio to be due to preferential transformation of sorbitol into glucose, preferential utilization of fructose, or