Genotype by Environmental Interaction on Grain Quality of Bread Wheat (<i>Triticum aestivum </i>L.) Genotypes at Southern Ethiopia

Information on the nature and magnitude of genotype by environment interaction that affects performance genotypes is essential to enhance quality improvement wheat. This study was conducted at five locations in southern Ethiopia using 4 replications randomized complete block design evaluate its effect grain bread wheat genotypes. The objective this determine x (GEI) production for some traits (grain protein content (GPC), gluten (GLTN), zeleny index (LI), TKW HLW). In twenty were conducted. Combined analysis variance showed highly significant differences (P < 0.001) among environments, their interactions all included study. GEI indicated not consistent over environments; performed well but poorly other locations. (40.20%), (29.89%) (14.55%) made contribution total treatment SS HLW which major variation due trait. For GPC, GEI, a 34.61%, 17.32% 13.59% respectively. ZI, (51.10%), (18.84%) (11.24%) observed. trait, high environment. GLTN, (33.31%), (28.14%) (14.10%) made. contributed as less Unsimilar proportional from G, E observed 40.32%, 26.35% 12.72% G Almost similar recorded tested numerically with lowest (12.64%) Bore highest (13.81%) A/Sorra. (60.33) Hidase, Zeleny Index (69.36ml) Wane, (14.38%) (33.24%) ETBW8407, (83.55) Shorima obtained. (46.34) old variety Kubsa, (56.99ml) Alidoro, conten (12.34%) PBW-34, (27.00%) PBW-34 again (74.83) Kubsa variations these across location, year-to-year factors such rainfall, temperature disease growing season.