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Bread wheat (Triticum aestivum L.) is most important cereal crop inEthiopia. Lack of genotypes with wide stability across environments has beenone of the most important constraints of wheat production in the country. Fieldexperiments were conducted in Halaba and Bule, South Ethiopia, in 2016 and2017, in order to estimate grain yield stability and association amongstability parameters. Fifteen improved bread wheat genotypes were grown underrandomized complete block design with three replications. Mean yield for Halaba2016, Halaba 2017, Bule 2016 and Bule 2017 was 3.83, 1.89, 2.90 and 3.59tons/ha, respectively. Genotypes Lemu (3.25 tons/ha) and Mandoyu (3.18 tons/ha)had high mean yield, and low values of environmental variance (S2i),coefficient of variation (CVi), stability variance (δ2i), ecovalence(Wi) and deviation from regression (S2di). Genotypes Biqa (3.69tons/ha) and Shorima (3.66 tons/ha) had high mean yield, coefficient ofregression (bi) and coefficient of determination (R2i ≥ 0.94) aswell as low values of δ2i, Wi and S2di. Grain yield hadpositive rank correlation with bi (r = 0.75, p 2i (r =0.70, p  δ2i, Wi and S2diwas high (r ≥ 0.98, p , Mandoyu andHidase, and Biqa and Shorima would be recommended for wide adaption, and formore favorable environments, respectively. It could also be suggested that oneof Wi, δ2i, S2di and rank sum would be used for rankingof genotypes.

american journal of plant sciences

Genotype by Environment Interaction for Grain Yield and Association among Stability Parameters in Bread Wheat (&amp;lt;i&amp;gt;Triticum aestivum&amp;lt;/i&amp;gt; L.)