LD on chromosomes 4H and 5H. LD matrix of spring (above the diagonal) and winter (below the diagonal) European barley varieties, as measured by r2 (colour coded by magnitude). Markers along the x-axis follow the same order as those indicated on the y-axis. Horizontal and vertical white blocks represent uncalculated data, due to invariant genotypes at these loci. Genetic map positions are from the consensus map of Varshney et al , after integration of additional markers where necessary. The scarcity of anchor markers close to HvPHYC in the 'Dicktoo' × 'Morex' genetic map  for integration into the consensus map, resulted in incorrect estimations of map position. Therefore, HvPHYC has been positioned 2 cM proximal to VRN-H1, as described by Szűcs et al .