Response of Potato Cultivars to Five Isolates Belonging to Four Strains of Potato virus Y

• DOI: 10.1094/pdis-01-12-0018-re
• Publication Date: 2012-05-09T19:25:41Z
• Authors: Bihua Nie; Mathuresh Singh; Agnes Murphy; Andrew Sullivan; Conghua Xie; Xianzhou Nie
• Keywords: Potato virus Y

The responses of 14 potato cultivars to five Potato virus Y (PVY) isolates belonging four strains (ordinary [PVYO], tobacco veinal necrosis [PVYN], N:O group [PVYN:O], and nonrecombinant tuber necrotic [PVYNTN]) were studied in primary secondary infections. For the infection experiments, foliage symptoms monitored daily after mechanical inoculation with a PVY isolate until harvest; and, for regularly from plant emergence harvest. Tuber (namely, ringspots) checked at harvest monthly postharvest up 4 months. In both infections, varied significantly depending on cultivar strain or isolate. local lesions occurred inoculated leaves 'AC Chaleur', 'Eramosa', 'Goldrush', 'Jemseg', 'Katahdin', 'Ranger Russet', 'Yukon Gold' PVYO isolates, followed by systemic latterly emerged uninoculated leaves. contrast, plants 'CalWhite', 'La Rouge', 'Red LaSoda', 'Russet Burbank', Norkotah', 'Superior' did not exhibit any visible but developed mild severe mosaic isolates. all cultivars, near-symptomless was induced PVYN PVYN:O. PVYNTN except AC Chaleur, 'Cherokee', Yukon Gold, which necrosis. Necrotic ringspots observed tubers PVYNTN-infected Cherokee, Gold. also incited PVYN-Jg Cherokee. generally more than infections even though symptom types alter. As greenhouse, clear severity pattern (PVYO-FL > PVYO-RB PVYNTN-Sl PVYN:O-Mb58 PVYN-Jg) Eramosa, Goldrush, Jemseg, Katahdin, Ranger Russet, Gold field.