Linkage map of Vitis vinifera Italia × Big Perlon. Linkage groups are numbered according to . For each linkage group, the parental maps are shown on the left (Italia) and right (Big Perlon) and the consensus map is in the centre. Markers common between parental and consensus maps are indicated by lines. Distorted markers have an asterisk showing the level of distortion (* = P ≤ 0.1, ** = P ≤ 0.05, *** = P ≤ 0.01; **** = P ≤ 0.005; ***** = P ≤ 0.001; ****** = P ≤ 0.0005; ******* = P ≤ 0.0001). Underlined markers are EST-based markers analyzed in the progeny Moscato bianco × Vitis riparia and mapped for synteny in the maps of Italia and Big Perlon. Distances of markers from the top are indicated on the left in cM Kosambi.