Selection for Resistance to Rice Sheath Blight Through Number of Infection Cushions and Lesion Type

Abstract

Individual plants from the first through third backcrosses of the rice sheath blight-resistant cultivar Tetep to the susceptible cultivar Lemont were selected for low infection cushion counts and for resistant-type lesions in the greenhouse. Replicated progeny field tests of selfed plants from each generation were conducted. Correlations between individual backcross plants, rated for number of infection cushions and lesion type, and disease ratings of their field-tested progeny were relatively low but resistance levels were maintained (.)