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VOL. 2, ISSUE 1 (2020)
Performance evaluation and grain yield stability of released upland rice (Oryza sativa L.) varieties at Southwestern part of Ethiopia, Jimma Zone
Authors
Tegegn Belete, Solomon Admasu
Abstract
In Ethiopia, rice is one of the most important
strategic food security crops and it becomes the source of income. In
Southwestern part of Ethiopia, especially in Jimma zone, lack of high yielding,
biotic and abiotic stress tolerant upland rice varieties were major problem for
the reduction of yield. The objective of the present study was to estimate the
magnitude of GEI and to identify high yielding and stable upland rice varieties
for Jimma zone and to recommend for large scale planting. A total of seven
(including one check) rice genotypes were evaluated in randomized complete
block design (RCBD) with three replications at Southwestern Ethiopia, Jimma
zone of Melko, Shebe and Kersa under main season conditions for two main
seasons (2021 to 2022). The combined ANOVA revealed significant variation among
G, E and GEI for mean grain yield of seven upland rice genotypes. The relative
contribution of E, G, and GEI indicated that environment was the most important
source of variation for grain yield performance. E, explained 68.14% of total
sum of square (SS) of grain yield, while GEI accounted for 20.73% and G
contributed 4.98%. The first 2 principal components (PC1 and PC2) were used to
create a 2-dimensional GGE bi-plot and explained 55.36 and 26.36 % of GGE sum
of squares, respectively with a total of 81.72% for yield variation. The GGE
biplot identified three rice growing mega-environments. The first mega
environment consisted of environments Melko 2022 (M22),Melko 2021 (M21) and
Kersa 2021 with the vertex genotype of Shaga (SHG) and Second mega environment
consists of Kersa 2022 (K22) with the vertex genotype of Nerica-4 (NE) and
third mega environment consists of Shebe 2021 and Shebe 2022 with the vertex
genotype of Wanzaye (WZ).Melko 2022 was ideal environment for rice evaluation
and rice variety,Shaga was found to be benchmark/ideal genotype and could be
used as check to evaluate the performance of other genotypes and also can be
recommended for wider cultivation in the tested locations and similar
agro-ecologies.
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Pages:41-45
How to cite this article:
Tegegn Belete, Solomon Admasu "Performance evaluation and grain yield stability of released upland rice (<i>Oryza sativa L.</i>) varieties at Southwestern part of Ethiopia, Jimma Zone". International Journal of Environmental and Ecology Research, Vol 2, Issue 1, 2020, Pages 41-45
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