Fig. 3. Greenhouse evaluation of late blight resistance of breeding lines derived from potato x Solanum bulbocastanum somatic hybrids. The plants were challenged with Phytophthora infestans isolate US930287. Photos were taken 10 d after inoculation. A, a resistant line WTS1269–3; B, a susceptible line WTS1258–4; C, a resistant line 4H5124–2; D, a susceptible line 4H5133–6.