2024, Vol. 7, Issue 10, Part G

author(s)
Sai Rekha Kadirimangalam, Anurag Mathew, Rachana Bagudam and Kiranmayee Bangaru

abstract
Calcium is an important secondary macronutrient which can affect the yield of groundnut. This experiment was aimed to determine the response of genotypes for different dates of gypsum application viz., no gypsum - control (T1), 30 days DAS (T2), 45 DAS (T3), 60 DAS (T4), 30+60 DAS (T5). Analysis of variance revealed significant difference between genotypes for all the traits; significant treatment effect for the traits, single plant yield and number of pods per plant; significant genotype x treatment effect for the traits namely single plant yield, number of pods per plant, 100-pod weight and 100-kernel weight. Highest mean performance for traits single plant yield, number of pods per plant, 100-pod weight and 100-kernel weight was recorded under 30 DAS (T2) and grey relation analysis also projected 30 DAS (T2) as the best treatment. GT-biplot analysis and ranking of genotypes based on SPY under different treatments expressed ICGV 02266 as the best genotype. ICGV 06040 showed high concentration of calcium in kernels under 30 DAS (T2) treatments. Results from this study clearly demonstrated that gypsum application had influence on groundnut yield and its related traits. Gypsum applied at 30 DAS (T2) was anticipated as the best treatment to enhance yield in groundnut. The best genotype identified ICGV 02266 identified as best calcium absorbers and could be used in further breeding program.