4 (3) 2020, JULY, 2020
Pages: 112-124
Studies on the genetic variability among wollega coffee (Coffea arabica L.) landrace in western Ethiopia
Author: Dawit Merga, Hussein Mohammed, Ashenafi Ayano
Category: Plant breeding
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Abstract:
The twenty six coffee genotypes (22 accessions with four standard checks) were tested during 2016 and 2017 cropping season using Randomized complete block design (RCBD) at Haru and Mugi Agricultural research sub-centers of Ethiopia to study the variability among Wollega Coffee. The combined analysis of variance revealed non significant difference among tested coffee genotypes in all traits although the difference among genotypes was significant for 7 and 6 of 8 traits at Mugi and at Haru, respectively. The difference between the two locations was not significantly different in all traits. Genotype x environmental interaction (GEI) was significant for all traits indicating inconsistency of performance of Coffee genotypes across the two locations. This manifested that the difficulty of developing widely adapted Coffee varieties maintaining similar in their organoleptic traits. Hence, in order to develop Coffee variety that is acceptable in organoleptic traits, it is momentous to focus on Coffee variety development for individual location. Clustering was performed using the average linkage clustering method. The 26 Coffee genotypes clustered in to four and three at Haru and at Mugi based on organoleptic traits respectively. The genetic distance analysis between all clusters at both locations showed highly significant difference indicating the existence of genetic variability among clustered genotypes. The current results revealed that the presence of genetic diversity among genotypes for most traits at individual location indicating the possibility of improvement for desired organoleptic traits.
Keywords: Variability, coffee , genotypes, organoleptic, cluster
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