Stability analysis of wheat (Triticumaestivum L.emThell) genotypes under different eco-systems R. K. Gupta 1 * and Rashmi Nigam 2 1 Department of Genetics and Plant Breeding, J.V. College, Baraut (Baghpat) U.P., India 2 Department of Plant Pathology, J. V. College, Baraut (Baghpat) U.P., India *Email: rajeshkumargupta.jvc@gmail.com Abstract Stability analysis of 15 different genotypes of wheat was evaluated in three environments. The three environments were artificial created by changing the dates of sowing i.e. timely sown, late sown and very late sown condition, irrigation and fertilizer levels. Observation were recorded for ii characters viz; Days to heading, days to maturity, plant height, peduncle length, No. of productive tillers per plant, spike length, No. of spikelets per spike, No. of grains per spike, 1000- rain weight, grain yield per plant and harvest index. Mean performance between genotypes and environments were significant indicating substantial variability among genotypes and environments for all the characters except peduncle length and spike length. Combined effect of genotypes and environment was significant for all the traits except peduncle length and spike length. The linear effect of environment for stability was significant for the characters but interaction of genotypes into linear environmental effect was highly significant for all the characters except spike length and peduncle length. The estimated value showed deviation pooled over the entire environment exhibited that all the characters were highly significant except peduncle length and spike length. Pooled analysis of variance was highly significant differences among the genotypes and environment for all the traits except for peduncle length and spike length for all three environments. Key words: Stability, irrigation, tillers, environment. Paper cited: Gupta, R.K. and Nigam, R. (2018). Stability analysis of Wheat (Triticumaestivum L.emThell) Genotypes under different Eco-systems. South Asian Journal of Food Technology and Environment, 4(2): 717-721. Introduction Wheat is the dominant grain of world commerce. It constitutes the major food for millions and millions of people on this planet; occupying the foremost position among the cereal crops of the world. Among the cereals, wheat accords a place of pride because of vast acreage covered in its cultivation, its nutritional value and its association with some of the earliest and most important civilization of the world. The performance of a variety is the function of its genotypes and environmental factors. Therefore, there is needed to make efforts in stabilizing their varietal performance under varying environmental and management conditions. The failure of a genotype to give differential phenotype performance when tested under different environment is the relaxation of the genotype environment interaction. It reduced association between phenotypic and genotypic value may cause selection from one environment to performance poorly in other, forcing plant breeder to examine phenotypic stability. The breeder’s objective should be to produce genotypes that are better adapted over range of environment. In order, to evolve the stable and highly desirable variety of wheat for different eco- system. Therefore, genotypes testing under different environment for yield and few quality traits has been found to be highly effective and useful (Gupta et al., 2009, Ahmad et al., 2001 & 2004; Gill et al., 1984; Rajput, 1984; Kishore et al., 1988; Ahmad and Kumar, 1989; Singh and Ahmad, 1991; Zakerin, 1993). There are a number of models (Finley and Wilkinson, 1963; Eberhart and Russell, 1966; Perkins and Jinks, 1968) based on different parameters which have better resolving power among the genotypes for testing stability. Materials and Methods The experimental material consisted 15 genotypes of wheat i.e. HD2329, PBW343, South Asian J. Food Technol. Environ., 4(2): 717-721 (2018) ISSN 2394-5168(Print), 2454- 6445(online) www.sweft.in South Asian J. Food Technol. Environ., 4(2): 717-721 (2018) [717]