International Journal of Research Studies in Agricultural Sciences (IJRSAS) Volume 5, Issue 7, 2019, PP 37-43 ISSN No. (Online) 2454–6224 DOI: http://dx.doi.org/10.20431/2454-6224.0507004 www.arcjournals.org International Journal of Research Studies in Agricultural Sciences (IJRSAS) Page | 37 Analysis of Genotype by Environmental Interaction and Stability for Grain Yield of Faba Bean (Vicia Faba L.) Genotypes in West and Kellem Wollega Zones of Western Oromia Dereje Abera * , Biru Alemu, Tashome Gutu Oromia Agricultural Research Inistitute (OARI), Haro Sabu Agricultural Research Center, P.O.Box 10, Kellem Wollega, Dambi Dollo, Ethiopia. 1. INTRODUCTION Faba bean (Vicia faba L.) is an important pulse crop grown in highlands of Ethiopia, where the soil and weather are considered to be congenial for better growth and development of the crop. The crop shares the largest area under pulses production in Ethiopia [1]. Faba bean is a crop of manifold merits in the economy of the farming communities in the highlands of Ethiopia and serves as income and source of food to farmers, earns foreign exchange to country, and plays a significant role in soil fertility restoration in crop rotation through fixation of atmospheric nitrogen. The crop is mainly produced in Tigray, Gondar, Gojjam, Wollo, Wollega, Shoa and Gamo-Gofa regions of Ethiopia [5]. Nevertheless, faba bean production in Ethiopia is constrained by stress like water logging, low yielding indigenous cultivars [1] and other stresses like diseases [2]. Correspondingly, the yield potential of faba bean has not been exploited in West and Kelem Wollega Zones of Western Oromia which might be attributed due to low yielding local cultivar usage by farmers and disease stresses prevalence in the locality. In order to uplift the production and productivity of the crop; screening of faba bean genotypes that withstands major production constraints in the area is crucial. Therefore, the study was conducted to identify and develop stable and high yielding varieties that are tolerant to major faba bean diseases in the study areas of West and Kelem Wollega Zones and other areas having similar agro-ecologies 2. MATERIALS AND METHODS 2.1. Description of the Study Area A field experiment was conducted at Haro Sabu Agricultural Research Center sub-sites (Badesso and Mata) for three (2015-2017) consecutive main cropping seasons and one extra site (Lalo Asabi). The Abstract: A field experiment was conducted on fourteen faba bean genotypes at Haro Sabu Agricultural Research Center sub-sites during 2015-2017 main cropping season with the objective to evaluate and select high yielding and stable genotype over test environments that are tolerant to major faba bean diseases. Randomized complete block design with three replications with net plot size of 1.6m x3m was used. Pooled ANOVA declared significant difference among evaluated genotypes for plant height, number of pods per plant, hundreds seed weight and grain yield. All observed agronomic traits excluding days to flowering and days to maturity showed significant differences across the testing environments. On the other hand, genotype by environment interaction had significant effect on number of pods per plant and grain yield. Stability parameters were estimated by employing AMMI stability Value, Genotype selection Index and explained by GGE biplot. The total variation of 45.55%, 6% and 22.51% were contributed by environment, genotypes and genotype by environment interaction for grain yield, respectively. G10 (16.74Qt/ha) and G12 (16.32Qt/ha) were identified for their better yield performance with yield advantage of 5.42 and 2.77%, respectively over the best standard check (Shalo=15.88Qt/ha). G10 and G12 had better mean value of thousand seed weight viz. 76.78 gram (G10) and 73.90 gm (G12) over Shalo (62.87 gram). AMMI biplot, ASV, GSI and GGE Biplot further confirmed that G10 and G12 were most stable and widely adapted genotypes. Therefore, the identified genotypes (G10 and G12) were suggested to be released as new varieties for West and Kelem Wollega Zones and areas with similar agro-ecology. Keywords: Faba bean, Stability, Yield *Corresponding Author: Dereje Abera, Oromia Agricultural Research Inistitute (OARI), Haro Sabu Agricultural Research Center, P.O.Box 10, Kellem Wollega, Dambi Dollo, Ethiopia.