Abstract
The screening of 114 groundnut (Arachis hypogaea L.) genotypes (61 advanced breeding lines and 53 releasedcultivars) was undertaken in the screening plots to identify the iron-efficient genotypes tolerant to lime-induced ironchlorosis.The crop was grown and the intensity of chlorosis of top five leaves was rated for visual chlorotic rating(VCR) score on a 1-5 scale and the percentage of plants showing deficiency symptoms at 10, 20, 30 and 65 daysafter emergence during the cropping season. The tolerant genotypes had shown significantly lower VCR, higher SoilPlant Analysis Development (SPAD) chlorophyll meter reading and chlorophyll values, active Fe, and high yieldcompared to the sensitive ones. The correlation of visual chlorosis range with SPAD, chlorophyll and available ironcontent along with the mineral nutrients like, Fe, Zn, Mn, K, and P clearly identified the groundnut genotypes astolerant, moderately tolerant and sensitive to iron chlorosis. Based on various parameters, out of 114 genotypes, 22were grouped as tolerant, 48 moderately tolerant, 32 normal and 12 sensitive. Maximum variability was obtained ingroundnut genotypes for Fe and fodder weight.
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