Overview of microsynteny between the stress-response and PAV gene-rich 1.1 Mb melon genome fragment and its homologous sequence in cucumber ( Cucumis sativus ) and watermelon ( Citrullus lanatus ). Genes are represented by circles. Genes with the same biological function are shown in the same color. Colors represent either multi-copy genes (intra-specific) or syntenic genes (inter-specific): yellow circles, lipoxygenase genes; orange circles, TIR-NBS-LRR genes; dark green circles, GDSL lipases; dark blue circles, CC-NBS-LRR genes; black circles, downstream from the CC-NBS-LRR cluster, terpenoid cyclase genes. Grey lines represent one-to-one syntenic relations and serve only to better visualize the overall syntenic structure in the region. Gene ID numbers in red denote PAV genes. The cucumber and watermelon genome sequence and annotation was obtained from Phytozome  (data as of October 23rd 2012). Figure drawn to scale.