Evaluation of improved lines of tomato for yield performance and disease resistance under open field conditions

Abstract

Field experiments were conducted in 2007 and 2008 at AVRDC – The World Vegetable Center’s-Regional Center for South Asia in Hyderabad, India to evaluate 30 improved lines of tomato for yield performance and field tolerance/resistance against Tomato leaf curl virus and Peanut bud necrosis virus. In 2007, yield ranged from 27.92 to 83.74 t/ha, while in 2008 it ranged from 62 to 80 t/ha. Lines DR2-1 (BL1173), DR-4 (BL1176), and NC 3220 X 57-27-3 were found to be high yielding and stable throughout the two-year period. Significant negative correlation was reported between disease severity index (Tomato leaf curl virus and Peanut bud necrosis virus) and yield. Low Peanut bud necrosis virus disease severity was recorded in lines DR2-1 (BL1173) (20 and 0.0%) and NC 3220 × 57-27-3 (23.3 and 0.0%) of and lower ToLCV disease severity in DR-4 (BL1176) (6.7 and 0.0%) and NC 3220 × 20- 21-5 (22.2 and 0.0%) against.