|YELLAREDDYGARI, S.K.R - NORTH DAKOTA STATE UNIVERSITY|
|BROWN, CHARLES - U.S. DEPARTMENT OF AGRICULTURE (USDA)|
|QUICK, RICHARD - U.S. DEPARTMENT OF AGRICULTURE (USDA)|
|HAMLIN, LAUNA - WASHINGTON STATE UNIVERSITY|
|GUDMESTAD, NEIL - NORTH DAKOTA STATE UNIVERSITY|
Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/3/2018
Publication Date: 7/1/2018
Citation: Yellareddygari, S., Brown, C.R., Whitworth, J.L., Quick, R.A., Hamlin, L.L., Gudmestad, N.C. 2018. Assessing potato cultivar sensitivity to tuber necrosis caused by Tobacco rattle virus. Plant Disease. 102(7):1376-1385. https://doi.org/10.1094/PDIS-12-17-1918-RE.
Interpretive Summary: Assessing potato cultivar sensitivity to tuber necrosis caused by Tobacco rattle virus S.K.R. Yellareddygari, Charles R. Brown, Jonathan L. Whitworth, Richard A. Quick, Launa L. Hamlin, and Neil C. Gudmestad. Interpretive Summary Potato tubers infected with Tobacco rattle virus (TRV) can develop necrotic tissue manifest as brown arcs and rings, reducing the tuber quality and increasing economic loss. Little is known about potato varieties sensitivity to these symptoms. Sixty three varieties representing all market-types were planted in naturally infested field trials in North Dakota and Washington. Results showed that there were three categories of symptoms; sensitive (developed symptoms), insensitive (no symptoms), and moderately sensitive/insensitive. The North Dakota data showed that nine varieties; Superior, Centennial Russet, Rio Colorado, Bintje, Lelah, Russian Banana, Ciklamen, Oneida Gold, and Gala were rated as insensitive to TRV tuber necrosis. Washington data showed only four varieties were moderately sensitive or moderately insensitive, with the remainder being sensitive. Results will help growers determine which varieties can be planted and grown without the risk of virus symptoms when planted into a field with a history of TRV associated tuber necrosis.
Technical Abstract: Assessing potato cultivar sensitivity to tuber necrosis caused by Tobacco rattle virus S.K.R. Yellareddygari, Charles R. Brown, Jonathan L. Whitworth, Richard A. Quick, Launa L. Hamlin, and Neil C. Gudmestad. Technical Abstract Tobacco rattle virus (TRV) causes economically important corky ring spot disease in potato. Chemical control is difficult due to the soilborne nature of TRV transmitting vector and identifying natural host resistance against TRV is considered as the best control measure. The present study is aimed at investigating the sensitivity of sixty three cultivars representing all market-types (evaluated at ND and WA over two years) for TRV-induced tuber necrosis and severity. This paper also investigates the cultivar and location interaction (using mixed-effects model) for TRV-induced necrosis. TRV-induced tuber necrosis (P < 0.0001) and severity (P < 0.0001) were significantly different among cultivars evaluated separately at ND and WA trials. Mixed-effects model results of pooled data (ND & WA) demonstrated that cultivar and location interaction had a significant effect (P = 0.03) on TRV-induced necrosis. Based on the virus-tuber induced necrosis data from both years/locations, cultivars were categorized into sensitive, insensitive and moderately sensitive/insensitive groups. Based on data from ND, ten cultivars, including Bintje, Centennial Russet, Ciklamen, Gala, Lelah, Oneida Gold, POR06V12-3, Rio Colorado, Russian Banana, and Superior were rated as insensitive to TRV-induced tuber necrosis. Similar trials assessing TRV sensitivity among cultivars were conducted in WA resulted in a number of differences in sensitivity rankings compared to ND trials. A substantial shift in sensitivity of some potato cultivars to TRV-induced tuber necrosis was observed between the two locations. Four cultivars, Centennial Russet, Oneida Gold, Russian Banana, and Superior ranked as insensitive for ND trials were ranked as sensitive for WA trials. These results will help growers in making individual or coordinated decisions for the management of TRV-induced tuber necrosis under field and storage conditions.