Fig. 2From: A major QTL controlling apple skin russeting maps on the linkage group 12 of ‘Renetta Grigia di Torriana’Distribution of unique co-segregating marker loci on the RGT (a) and GD (b) parental maps. Black bars represent either SNP or SSR markers. Linkage group (LG) number is indicated on the top of each LG. Genetic distance in cM is shown on the left rulerBack to article page