Screening of Parents and Hybrids Resistant to Late Blight and Leaf Curl Virus Diseases in Tomato

The experimental material included 21 F1 hybrids (developed by half diallel fashion), 7 parents and standard check were all planted in randomized complete block design with three replications at Bihar Agriculture University, Sabour. Among the Pusa Rohini, Arka Vikash S. pimpinellifolium whereas, among crosses, Rohini × Vikash, H-86 showed highly resistant for per cent disease incidence coefficient of infection late blight ToLCV. Maximum heterosis over better parent desirable direction found (-48.61, -52.84), (-72.12, -76.42) Abha (-42.02, -50.35), (-61.35, -75.17) blight. Whereas PDI CI ToLCV was cross combinations namely, (-46.35, -65.08), (-77.50, -88.35) (-60.85, -64.32) (-86.95, -88.27) parent. identified as best specific combiners significantly shown Abha. Against (PDI CI) resistance, exhibited negative GCA effect.