QTL^epi heat map for metabolic and morphological traits. QTL^epi heat map showing the positions of the QTL^epi and the overlap with QTL^epi for morphological traits divided over the five chromosomes. The morphological traits were described previously (Kooke et al. 2015). The thin black lines in the second row indicate the marker positions in cM. (Trait) Metabolite number or morphological trait, (P) phenotype group, (L) leaf, (F) flower, (M) morphology. The legend on the right indicates the QTL LOD score between −5 (red) and 5 (blue).