Location: Small Grains and Potato Germplasm ResearchTitle: Foliar and tuber symptoms of U.S. potato varieties to multiple strains and isolates of Potato virus Y
|GRAY, STEWART - Retired ARS Employee|
Submitted to: American Journal of Potato Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/25/2020
Publication Date: 1/25/2021
Citation: Whitworth, J.L., Gray, S.M., Ingram, J.T., Hall, D.G. 2021. Foliar and tuber symptoms of U.S. potato varieties to multiple strains and isolates of Potato virus Y. American Journal of Potato Research. 98:93-103. https://doi.org/10.1007/s12230-020-09820-1.
Interpretive Summary: Potato virus Y (PVY) causes foliar symptom in a wide range of potato varieties. This virus can also cause damage to tubers in the form of ringspots and dead (necrotic) tissue on the surface and sometimes internally in the tuber. In this study, 67 potato varieties from five market classes (russets, chip, red skin, white skin, and specialty) were infected with up to five different strains of PVY using multiple isolates of each strain. The most severe foliage symptoms were associated with strain PVYO and the mildest symptoms were associated with the PVYN:O strain. Tuber necrosis was produced by some virus isolates in some cultivars in all five PVY strains tested (O, NTN, N:O, Nwi, NE-11). Knowledge of the symptoms associated with particular virus strains and potato varieties will help growers determine the amount of risk associated with PVY infections.
Technical Abstract: Potato virus Y (PVY) causes both foliar and necrotic tuber symptoms in a wide range of varieties. Knowledge of these symptoms in specific varieties will help managers determine the best course of action when plants are infected with PVY. Multiple isolates of PVY fromfive strains of PVY were used to infect potato varieties. Five market classes were represented and an overall total of sixty-seven potato varieties were used. Visual foliar ratings showed the most severe symptoms were associated with strain PVYO and the mildest symptoms were associated with PVYN:O. Tuber symptoms were not present in the red market class but were present and accounted for 38% of the symptoms in the chip class, 29% in the russet class, and 58% in the specialty/white class. Necrotic tuber symptoms were produced by some isolates in some cultivars in all five PVY strains O, NTN, N:O, Nwi, NE-11.