Figure 2From: Novel candidate genes influencing natural variation in potato tuber cold sweetening identified by comparative proteomics and association mappingCorrelation between mean protein spot intensity and reducing sugar content (RSC) in 40 cultivars without cold treatment. (A) Representative pattern of tuber proteins obtained by 2D-PAGE. Numbered arrows point to the five spots with significant correlation between mean spot intensity and RSC (Table 1). (B-F) Correlation plots of the logarithmic values of mean spot intensity versus RSC. Plots B, C, D, E and F correspond to spots 1, 2, 3, 4 and 5, respectively. Framed numbers indicate potato cultivars listed in Additional file 1: Table S1.Back to article page