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The additive main effects and multiplicative interaction (AMMT) model for seed yield of 60 varieties of sesame per plant detected significant effects of the genotypes (17.87% sum of squares (SS)), environments (14.15% SS) and genotype × environment interaction (67.99% SS). The model also extracted two significant interaction principal component analysis (IPCA) with a total of 79.9% SS and 67.8% corresponding degrees of freedom. Genotype TMV-7 (17.308 g/plant) followed by N-8 (13.994 g/plant) had the highest average yield which was much greater than the grand mean (10.976 g/plant) and declared as area specific adapted genotypes. Environments El, E2 and E4 were unfavorable while E3 is the most suitable as indicated by high mean value of IPCA 1 and low value of IPCA 2. Introduction Sesame (Sesamum indicum L.) is one of the most ancient oilseed crops, commonly known as Til in India and used by human beings from ancient times. The genus Sesamum (2n = 26) is a member of Pedaliaceae which contains 16 genera and 36 species, most of which occur in Africa (Ashri 2007). Laurentin and Karlovsky (2006) studied 32 sesame accessions which were collected from five geographical regions representing the proposed diversity centers and found that there is very high genetic diversity among sesame collections from those regions. Kobayasi (1981) reported that about 36 species of sesame are said to exist and most of them are located in Africa, with a few in India. Bedigian et al. (2003) considered East Africa and India as early origins for sesame. Chemical composition of seed shows that it contains 42 63% oil, 22 25% protein, 13.5% carbohydrate and 5% ash (Tunde-Akintunde and Akintunde 2004 and Elleucha et al. 2007). The presence of sesamin and sesaminol lignans in its nonglycerol fraction contributed to oxidative stability and antioxidative activity of sesame oil (Wu 2007). Most abundant fatty acids present in sesame oil include: oleic acid (43%), linoleic acid (35%), palmitic acid (11%) and stearic acid (7%) contributing toward 96% of total fatty acids (Elleucha et al. 2007). India holds a premier position in the global oilseed’s scenario accounting for 29% of the total area and 26% of production. In India, sesame is cultivated in 17.138 lakh hectare with a production of 7.84 lakh tonnes and productivity of 457 kg /ha. Madhya Pradesh contributes 19.71 and 23.68% share of country’s area (3.80 lakh ha) and production (1.94 lakh tonnes), respectively with productivity of 511 Kg/ha (DACNET, 2016-17) to improve the production and productivity of sesame in India evaluating different genotypes across different environments or the G × E interaction study might be important for supplying area specific or widely adapted improved seeds. Genotype by environment interaction (G × E interaction) refers to the deviation in performance of any attributes of genotypes within the various growing environments across *Author for correspondence: <bhagwat237@gmail.com>.

Ammi analysis of genotype × environment interaction and stability of sesame genotypes