Fifty-five Indian mustard genotypes comprising forty-five hybrids and ten parental genotypes along with a two checks viz., NRCHB-506 and DMH-1 were evaluated for stability parameters of morphological and biochemical characters over the three different environments. Pooled analysis of variance over three environments showed that the genotypic variance when tested against G × E were significant for all the eight characters when tested against pooled deviation effect was significant for all the traits except protein content. | Assessment of genotype environment interaction and stability analysis in Indian Mustard Brassica juncea L.