Effect of rice tungro virus on growth and yield components of rice cultivars possessing different levels of tolerance.

摘要

The effect of rice tungro virus (RTV) on growth and yield components of 3 rice cultivars (TN-1, IR 34 and Saket 4) were studied. TN 1 and IR 34 showed 100% infection by RTV, irrespective of growth stage at inoculation. RTV infection caused considerable damage to the susceptible cultivar TN 1 and the tolerant cultivar IR 34 by reduction in plant height, percentage of panicle bearing tillers, grain weight and grain yield while the resistant cultivar Saket 4 was not affected either in terms of growthcomponents or yield.