Abstract
For genotype’s performance across diverse environments, where genotype x environment (GE) interaction
occurs, a selection criterion that takes GE interaction into consideration does not exist. However, an output
obtained by using proper methods help the breeder to asses which genotypes are more stable. Twenty selected
genotypes of spring wheat were evaluated across thirty one different locations in Pakistan for stability parameter
of grain yield. GE interaction was highly significant that indicated the influence of environments on grain yield. On
the basis of Safety – First Rules proposed by Kent, M.E (5), genotypes such as V-97046, 97B2210 V-98059 and
V-97052 were found as stable genotypes with respect to wheat yield (T.ha-1). Moreover, the genotypes performing
similar response pattern over the environments and the environments over all genotypes were grouped by using,
Ward’s fusion strategy of hierarchical classifying technique (cluster analysis) on wheat GE interaction data
