Fig. 3.

Locations of Ny-1 (Szajko et al. 2007), Ry _chc (Sato et al. 2006; Mori et al. 2011) and Ny-Smira genes for PVY resistance on potato chromosome IX. Genetic linkage map of the cv. Sárpo Mira haplotype bearing the PVY resistance gene Ny-Smira was constructed on the basis of SM × MP progeny (Jupe 2012). A segment of Tomato-EXPEN 2000 map (SGN) is shown as a bridge between maps of cv. Rywal (Szajko et al. 2007) and 98H20-50 (Sato et al. 2006). To enable comparison, markers in parentheses GP41 and Ry186 are added on the basis of information from other sources: Tomato-EXPEN 1992 map (SGN) and Mori et al. (2011), respectively. Markers common between maps are underlined. On the left of each map, cumulative genetic distances are given in cM