Density of SNPs in the cluster of R-genes across five melon cultivars. A Vertical colored lines mark the position where a SNP is detected in any of the following melon cultivars: CV: C-836, IQ: C-1012, PI: PI 161375, DHL: DHL92, PS: T-111 “Piel de Sapo”. Reference: DHL92 MELO3C004258-MELON3C004324 improved region. Blue lines: same nucleotide as in the reference; red lines: alternative nucleotide (two alleles); yellow lines: alternative nucleotide (one allele only). The “R-Genes” track shows the position of the TIR- and CC-NBS-LRR genes. B As in A, but only SNPs in the coding sequences of the R-genes are shown. Figure produced with SVAMP software.