Abstract: In multi location yielder trial selection of genotypes and determination testing site is important prerequisite for recommendation of genotypes for the production environment. Patten analysis was done up on 19 released bread wheat genotypes across 7 testing environments with objective of assessing the pattern response of genotypes across testing environment and identifying possible mega-environments. The trial was conducted in Randomized Completed Block Desigen (RCBD) having two replications. The pattern analysis showed that the environment captured large sum of square (78.3%) followed by the genotype by environment interaction (14.8%). The 19 bread wheat genotypes were classified into 9 genotypic cluster and 5 environmental clusters using the clustering analysis of the last cluster. The polygon view of the biplot analysis showed of the presence of two mega-environments. The testing environments were positively correlated except Atsella, 2013 and Adigolo, 2013 were negatively correlated.