1. F 3 Population VBSD Expected scores Number of lines Quantiles the scores Expected scores Vascular Browning Score Number of lines a 3 3 Quantiles the scores Vascular Browning Score Supplementary Fig. 1 Histogram and normal-scores plot of a) VBSD, b) VBS, c) LS, d) VBSD and e) % survival in F3 families. Arrows reflects mean value of parental controls; solid = MCU-5, dotted = Siokra 1-4. VBS b

2. F 3 Population LS Quantiles the scores Expected scores Leaf symptom Score Number of lines LSWTD Quantiles the scores Expected scores Leaf symptoms weighted for death Number of lines 3 3 c d Supplementary Fig. 1 Continued

3. F 3 Population % Survival Quantiles the scores Expected scores Percent survival Number of lines 3 e Supplementary Fig. 1 Continued