A multi- locations field trial was conducted for two consecutive seasons 2017/2018 and 2018/2019 at three locations of Newhalfa irrigated scheme to estimate genotype by environment interaction for some growth attributes, yield and yield components of two wheat genotypes. A randomized complete block design with three replicates was used to lay out the field trial. Highly significant differences at the genotypes level, season x genotypes and season x location x genotypes levels for leaf area, number of spike lets per plant, grain yield per plant, straw weight, grain yield per m2 and harvest index was detected. Dry weight showed non â€“ significant differences at the genotypes and genotype x season interaction levels, whereas, the number of grains per plant showed non-significant difference at the genotypes level only. In addition, the results indicated that, the genotypic variances were greater than the environmental ones for yield and its components. From this study, it can be concluded that, sufficient genetic variability was available in the tested materials and selection of a desirable genotype of wheat, is to be made after it thoroughly tested for more than one year and at more than one location.
Keywords: Triticum, aestivum, Genotype x seasons, Genotype x locations, yield