2016, VOLUME 3 ISSUE 3Pages: 600-605
Disease progression in potato germplasm from different reaction groups against potato virus Y in relation to environmental factors
Ata-ul-Haq, Yasir Iftikhar, Muhammad Irfan Ullah, Mustansar Mubeen*, Qaiser Shakeel, Faheema Bakhtawar and Iram Bilqees
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Germplasm of 10 potato varieties/lines were screened out against PVY. Out of 10, five (Tota-704, FD 71-1, FSD WHITE, FD 8-1, FD 76 24) were found susceptible, three (FD 74-41, FD 74-50 and N-96-25) moderately susceptible and two (Kuruda and SH 216 A) moderately resistant varieties. The mean incidence of PVY was 61%. ELISA confirmed virus in the samples from all varieties showing moderately yellow to yellow color in the ELISA plate. There was significant correlation between PVY and maximum, minimum temperature and relative humidity. Disease severity was maximum in the range of 20–29°C for maximum temperature, 5–6°C for minimum temperature in all three groups of Varieties. 82–83% relative humidity favors the disease severity.
Fig.: Disease progression in susceptible varieties against PVY in Sargodha.