Metabolite and enzyme correlations. Visualization of Spearman’s correlations between the rate of metabolite production (nmol g FW-1 min-1) and the enzymatic capacities during peach fruit development for the 77 ‘standard-fructose-to-glucose-ratio’ genotypes. The square color corresponds to the correlation value as shown in the legend: blue represents a negative correlation, and red represents a positive correlation. The white squares correspond to non-significant correlations (P value >0.01). Abbreviations: PGM, phosphoglucomutase; F16BPase, fructose-1,6-bisphosphatase; SuSy, sucrose synthase; FK, fructokinase; UGPase, UDP-glucose pyrophosphorylase; HK, hexokinase; SPS, sucrose phosphate synthase; SDH, sorbitol dehydrogenase; SO, sorbitol oxidase; PFK, ATP-phosphofructokinase; NI, neutral invertase; AI, acid invertase.