Field evaluation of bacterial wilt resistant lines and identification of promising bacterial wilt resistant varieties for Coastal region

Abstract

Cultivation of brinjal in Coastal regions of India is severely affected by bacterial wilt disease caused by Ralstonia solanacearum. In this study, recombinant inbred lines were developed and screened for bacterial wilt resistance. Seventeen promising resistant lines were evaluated in the field for two years and the results indicated these lines were resistant to bacterial wilt. Lines 262-4, 5-12-1, 66-8-1, 205-1, 12-2-4 and 28-8-5 were promising among the purple types (0 to 4 % wilt and yield 0.51 to 0.93 kg/ plant). Among the green types, lines 5-8-1, 93-8-1 and 92-3-7 were promising (0 to 5 % wilt and yield 0.64 to 0.79 kg/ plant). Demonstration of eight lines in farmer’s field indicated that lines 262-4, 5-12-1, 205-1, 5-8-1 and 12-2-4 were least infected (3 to 17 %). Based on these studies, four purple lines 262-4, 5-12-1, 66-8-1 and 205-1 were released as bacterial wilt resistant brinjal varieties in the State of Goa.