Exploiting genetic variation for lime-induced iron-deficiency chlorosis in groundnut (Arachis hypogaea)

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