Abstract

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Multi-environment rice evaluation trials were conducted in eight environments across Northwest Ethiopia to select promising varieties that can be cultivated by farmers. Sixteen upland rice genotypes were planted in a randomized complete block design of three replications in each location. Data were analyzed using combined analysis of variance, Additive Main Effects and Multiplicative Interaction (AMMI) and GGE bi-plot analysis. The MMI analysis of variance for grain yield (kg ha-1) of 16 upland rice genotypes revealed that the main effects of genotypes (G) and environments (E) accounted for 53.8% and 26.8 % of the treatment SS, respectively. The G x E interaction also accounted for 19.4% of the treatment SS. The mean grain yield value of genotypes averaged over environments indicated that WAB450-1-B-P-462-HB (G11) had the highest (4085.8 kgha-1), followed by ARCCU3Fa11-L1P1-B-B-1 (G4) and ARCCU2Fa11-L2P1-B-B-1(G9) with grain yield of 3975.8 and 3853.3 kgha-1,respectively. As revealed by AMMI and GGE bi-plots, the genotype G11 was identified as specifically adapted to Fogera (Woreta areas). Following evaluation of candidate genotypes (G11, G4 and G9) and collecting farmers feedback , the National Variety Release Committee also recommended G11 as variety for cultivation in Fogera and other areas of similar cultivation conditions.

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