Arabica coffee is an essential crop in the national economy of Ethiopia. There is little information available about the cup quality profile of Teppi coffee, despite several sites across the country having conducted research on the organoleptic properties of various coffee types. Therefore, an experiment was conducted to determine the quality attributes of the genotypes and correlate their inherited quality with morphological traits. The experiment was superimposed on five-year-old plants of 17 coffee genotypes during the 2018 cropping season at Teppi and Gemadro sites. Using the wet processing method, six kilograms of red coffee cherries were carefully harvested, processed, and sun dried to a moisture content of 10.5% to 11.0%. To obtain the necessary number of replications, each sample was divided into three, and three cups for each sample were prepared for the tasting sessions. Organoleptic quality attributes were scored using the standard established. The analysis of variance for aromatic quality, acidity, flavor, and overall cup quality showed a highly significant difference ( $P$ = 0.01) among the tested coffee genotypes. All of the organoleptic quality attributes evaluated showed a no significant correlation with morphological traits like body (r = −0.11) and hundred-bean weight and, flavor (r = −0.1) and bean thickness. However, there was a strong correlation between organoleptic quality attributes like flavor (r = 0.95 ${}^{\ast \ast }$ ) and acidity (r = 0.94 ${}^{\ast \ast }$ ), demonstrating that any organoleptic characteristic is an important element in beverage quality. It is challenging to simultaneously choose for cup quality and bean physical features because there were no significant correlations between organoleptic quality and these traits. In this study, genotype 3/8 showed outstanding performance across locations for all organoleptic quality attributes, which can be used in the Arabica coffee-breeding program.

Arabica coffee is a perennial cash crop and highly affected by biennial bearing which disturbs farmers’ annual income and world’s coffee industries. Developing nonbiennial bearing variety is prominent in addition to applying field management practices. This study was conducted from 2012 to 2020 in southwestern Ethiopia at Tepi and Gera to test the extent of genetic variability among Arabic coffee germplasm in biennial bearing and understand the influences of bienniality on advanced selection. The pooled analysis of variance revealed handiness of genetic variability in yield and biennial bearing. The moderate genotypic coefficient of variation (10–20%), heritability (30–50%), and high genetic advance as percentage of the mean (>20%) were manifested in yield and biennial bearing. Response to selection and selection efficiency were negatively affected by biennial bearing. Early selection excluded 30–40% of the top high yielders from advanced selection. Selection at four harvesting seasons revealed 90% and more selection efficiency. Thus, one has to be conscious of the alternate bearing nature of lines during advanced selection. Both T43/11 and T51/11 were among the top high yielders and showed low biennial bearing at Gera and Tepi. T33/11, T49/11, T55/11, and T61/11 showed very low biennial bearing at both locations. These are promising lines and could be recommended for further biennial bearing improvement breeding programs.

Coffee is the stimulant crop plant that belongs to the genus Coffea, in the family Rubiaceae. The yield variation and pattern of the crop varied within short geographic distance and thus attributed to low productivity and unpredictable production. The objective of this study was to determine the extent of genotype x environment interaction on yields of promising Teppi coffee genotype. In this study, seventeen Arabica coffee genotypes, representing coffee growing areas of Teppi, southwestern Ethiopia were evaluated at six environments. This study was conducted by using completely randomized block design with two replications. The extent of genotype x environment interaction was analyzed by using additive main effect and multiplicative interaction model and genotype main effect and genotype x environment interaction biplot analysis model. The analysis of variance for yield revealed the presence of highly significant differences (P < 0.01) within genotypes, environments and genotype by environment interaction. From the total sum of squares of genotype x environment interaction of yield, environment accounted for 51% while genotypic and GEI effects were 20.5% and 25.32%, respectively. Generally, genotypes with superior performance and suitable environments for coffee were identified. However, further researches have to target hybridization of those superior genotypes with elite lines in feature Arabica coffee breeding program.

Ethiopia is the center of origin and genetic diversity for Arabica coffee ( Coffea arabica L.). The country’s coffee sector relies on this genetic diversity to produce high‐quality coffee with unique flavor profiles. However, little is known about the quality of introduced lowland coffee genotypes. This study aimed to evaluate the quality of introduced lowland coffee genotypes in southwestern Ethiopia. Seven coffee entities, comprising five introduced lowland genotypes and two standard checks, were evaluated in a multilocation field trial conducted at Agaro, Teppi, and Gelesha over 3 years. The experimental design employed was a randomized complete block design (RCBD) with three replications. Quality parameters, including both physical characteristics and cup quality attributes, were analyzed at the Jimma Agricultural Research Centre, Coffee Quality and Processing Laboratory, using a completely randomized design (CRD) with three replications, following the washed processing method. Data on physical parameters (screen size, shape and make, odor, color, and raw quality) and cup quality attributes (aromatic intensity, aromatic quality, acidity, astringency, bitterness, body, flavor, overall, and total quality) were collected and analyzed. Significant genotypic variation ( p < 0.05) was observed across locations for all traits except screen size and odor. Location‐specific differences were noted, excluding bitterness in Teppi and color, aromatic intensity, and astringency in Gelesha. Key quality parameters such as acidity, bitterness, body, flavor, raw, and cup scored 7.50–8.50, 3.83–4.67, 7.50–8.50, 7.50–8.60, 35.67–39.00, and 46.83–53.43, respectively. Total quality scores ranged from 83.83 to 90.77 points, categorizing genotypes as very good and highly acceptable, with the Eb1 genotype exhibiting a distinct spicy character. Essential parameters such as yield, yield‐related attributes, and resistance to diseases and insect pests also need to be considered. Subsequently, genotypes can be recommended for production following evaluation by the National Variety Releasing Committee. Further research should investigate genotype–environment interactions and the biochemical composition of sensory traits to improve quality consistency in lowland agroecologies.