Figure 3From: Validation of reference genes for gene expression analysis in chicory (Cichorium intybus) using quantitative real-time PCRDetermination of the optimal number of reference genes calculated by geNorm. Determination of the optimal number of reference genes for accurate normalisation of gene expression. Average pairwise variations Vn/Vn+1 are calculated between the normalisation factors NFn and NFn+1 to indicate whether inclusion of extra reference gene adds to the stability of the normalisation factor.Back to article page