Disease Scoring and Evalution for Late Leaf Spot Resistance with Yield and Yield Components in Groundnut (Arachis hypogaea L.)
Prachi Jain *
Department of Genetics and Plant Breeding, S.V. Agricultural College, Tirupati, India.
M. Sreevalli Devi
Department of Genetics and Plant Breeding, Agricultural Research Station, Perumallapalle, India.
K. John
Department of Genetics and Plant Breeding, Regional Agricultural Research Station, Tirupati, India.
P. Arunasri
Department of Plant Pathology, S.V. Agricultural College, Tirupati, India.
*Author to whom correspondence should be addressed.
Abstract
Groundnut (Arachis hypogaea L.) is an important oil seed crop being adversely affected by foliar fungal disease viz., late leaf spot. The objective of this study is to identify genotypes with high yield and yield component traits along with resistance to late leaf spot disease (LLS). Based on the per se performance, the genotypes viz., TCGS-2485, TCGS-2493, TCGS-2498, TCGS-2501, TCGS-2500, TCGS-2528, TCGS-2486, TCGS-2520, TCGS-2502 and TCGS-2519 were found to be promising genotypes and these genotypes could be further utilized as parents for improvement of yield and its related characters in the breeding programmes. By analysing the LLS disease score at 75 DAS and 90 DAS, five advance breeding lines viz., TCGS-2501, TCGS-2528, TCGS-2500, TCGS-2519 and TCGS-2526 were classified under resistant at 75 DAS and moderately resistant at 90 DAS and showed less disease severity along with superior performance in most of the yield contributing traits. Hence, these advance breeding lines could be utilized as donors in LLS resistance breeding programmes of groundnut.
Keywords: Late leaf spot, foliar fungal disease, advanced breeding lines and groundnut