Comparison of the Tm-2 and Sw-5 clusters between Solanum lycopersicum Heinz 1706 and S. tuberosum clone DM and identification of the Ph-3 locus in the tomato genome. (A) Physical mapping position of NB-LRR gene clusters close to the physical Ph-3 locus, based on marker information derived from [15, 16]. (B) Phylogenetic analysis performed using the maximum likelihood method, based on the general time reversible model, for homologous sequences of the Tm-2 and Sw-5 clusters. Cartoon potatoes and tomatoes at the end of the branches indicate the origin of the sequence. Bootstrap values (100 replicates) are indicated above branches. (C) Schematic representation of hypothesised gene duplication events that occurred in the tomato and potato genomic region of Tm-2 and Sw-5 clusters. NB-LRR genes are depicted as boxes, and the colors relate to (B).