Phenotyping of sesame (Sesamum indicum L.) genotypes for powdery mildew resistance

Abstract

Present Investigation is conducted with thirty sesame genotypes for screening of powdery mildew disease. All the thirty genotypes were raised during Rabi season and infector row method was followed to obtained uniformity in disease reaction. After 45-60 DAS genotypes were scored for powdery mildew using 0-9 scale. Based on the PDI score, thirty genotypes were classified into Resistant (10), moderately resistant (13) and Susceptible (7) categories. From thirty genotypes, VRI-1 showed highly resistant reaction and Rama showed highly susceptible reaction. No genotypes found to be immune in response. Resistant genotypes can be utilized in breeding programme for development of resistant varieties and it can be utilized for identification of marker by crossing it with the susceptible genotype.