Fig. 4

Phenotypic variation in the melon core collection. Distribution for eleven horticultural (a-i) and disease resistance (j-k) traits. a Mature fruit weight (kg). b Mature fruit width (cm). c Mature fruit length (cm). d Mature fruit length/width (L/D) ratio. e Soluble solids content (^oBrix). f Fruit surface type. 1, Smooth; 2, Grainy; 3, Finely wrinkled; 4, Deeply wrinkled; 5, Shallowly wavy; 6, Rare warts; 7, Numerous warts; 8, Lightly corked/netted; 9, Heavily corked/netted; 10, Vein tracts. g Fruit set earliness. 0, Very early; 1, Early; 2, Intermediate; 3, Late; 4, No female flowers at anthesis; 5, No male flowers at anthesis; 6, No flowers present. h Ovary pubescence type. 1, Spreading hairs (ssp. melo); 2, Appressed hairs (ssp. agrestis). i Sex expression. 1, Monoecious (male and female on same plant); 2, Andromonoecious (male/female and male on sample plant). j Resistance to cucurbit powdery mildew (CPM). 1, No evidence of disease; 4, Few colonies present, sporulation; 5, Scattered colonies, sporulation; 6, Numerous colonies, sporulation; 7, ~ 50% of adaxial surface covered with hyphae and spores, few colonies on abaxial surface, abundant sporulation; 8, > 50% of adaxial surface covered with hyphae and spores, scattered colonies on abaxial surface; abundant sporulation; petiole and internodes may be infected; 9, > 75% of adaxial surface covered with hyphae and spores, numerous or coalesced colonies on abaxial surface; heavy sporulation; petiole and internodes usually infected. k Resistance to Cucurbit yellow stunting disorder virus (CYSDV). 3, 20–30% foliage symptomatic; 4, 30–40% foliage symptomatic; 5, 40–50% foliage symptomatic; 6, 50–60% foliage symptomatic; 7, 60–70% foliage symptomatic; 8, 70–80% foliage symptomatic; 9, 80–90% foliage symptomatic; 10, > 90% foliage symptomatic. Trait descriptors are also provided in Supplementary note