Maize is a major grain crop that is widely adaptable to many agro-ecologies across the world. The goal of the study was to see how adaptable and stable open pollinated maize varieties are in terms of grain yield and yield-related features in the Western Guji Zone's mid-altitude areas. Different genotypes perform differently in each location, which may be used to boost production. Six open pollinated maize varieties were transported from Bako National Maize Research Center and planted in RCBD with three replications at Yabello Pastoral and Dryland Agriculture Research Center's Galana and Abaya sub sites for three years. The results of the analysis of variance revealed that there was a substantial yield difference between genotypes. Gibe-2 had the greatest average grain production of 5.85 t/ha, followed by Kulani with 5.63 t/ha across years and locations, according to the combined analysis of variance. Kulani was found to be the most stable of all the varieties, whereas Gibe 2 was shown to be the most unstable. Kulani's and ABO-additive Bako's main and multiplicative interaction stability values (ASVs) were both near to zero (0.08 and 0.27, respectively), but Gibe 2's ASV was significantly higher (1.62) and deviated from zero. As a result, Kulani was stable and high yielding across settings, whereas Gibe 2 was high yielding in a single environment (unstable). So, and Kulani were recommended for cultivation in the Galana and Abaya districts of southern Oromia, as well as regions with comparable agro ecologies, while Gibe 2 was recommended for the Galana district.

Bread wheat (Triticum aestivum L.) is the most important cereal occupying a protruding position among major food crops in the world in terms of acreage and production and is an important cereal crop which is receives the most attention of specialists in plant breeding and production in the world wide in general and in Ethiopia in particular. This experiment was conducted on five bread wheat varieties Mandoyo, Mada-Walabu, Sofumar, Dure and Sanate against local check at Bule hora woreda to identify and recommend high yielder, insect pest tolerant, and stable varieties. The experiment was carried out in a Randomized Complete Block Design (RCBD), with three replications. Yield and yield related parameters were analyzed using SAS statistical software version 9.0. Most of yields and yield related components were significantly different between the varieties at 5% probability level. Based on the mean separation, the highest average grain yield was recorded from Sanate variety 3926.3 kg/ha while, the lowest average yield (2753.2 kg/ha) was recorded from Local check. From total analysis Sanate variety had a yield advantage over the check (Local). Therefore, we suggest that, farmers, state farms and other private bread wheat producers located at the study areas and with similar agro ecologies are recommended to use Sanate variety to increase bread wheat yield.