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http://dx.doi.org/10.5423/RPD.2006.12.1.028

Seasonal Incidence of Potato virus f Infection on Potato Cultivars for the Double Crops in Korea  

Hahm Young-Il (National Institute of Highland Agriculture)
Lee Young-Gyu (National Institute of Highland Agriculture)
Publication Information
Research in Plant Disease / v.12, no.1, 2006 , pp. 28-31 More about this Journal
Abstract
One of major potato viruses is Potato virus Y (PVY) in Korea. In the southern part of Korea, potatoes have been grown as double crops in a year by using cv. 'Dejima' and 'Chubak' due to very short dormancy. However, they have caused a serious problem such as a rapid degeneration. It has been thought that the degeneration is affected by the high incidence of PVY in neighboring potato fields. Therefore, the investigation of factors causing the degeneration is very important in the production of healthy seed potato. In this study, the PVY reinfection rates of several potato varieties and the different seed sources of cv. 'Chubak' have been investigated. Results show that the lowest infection rate of PVY among four potato cultivars derived from minitubers is cv. 'Superior'. The others are in order of 'Dejima', 'Atlantic' and 'Chubak'. Also, the incidences of PVY differ significantly when several seed sources are examined. When the seed potatoes (G2, the progeny of microtuber) as spring potato crops are planted in area without potato field nearby, the infection rate of PVY is as low as that of microtubers. However, PVY incidence in the progenies of minitubers as fall potato crops largely increases. Therefore, the best way of potato production under double cropping system is to use the healthy seed potato produced in area without potato field and plant relatively resistant cultivar such as Dejima.
Keywords
Degeneration; PVY; Reinfection; Resistant cultivars;
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