TITLE:
Multi-Environment Evaluation and Genotype × Environment Interaction Analysis of Sorghum [Sorghum bicolor (L.) Moench] Genotypes in Highland Areas of Ethiopia
AUTHORS:
Amare Seyoum, Zigale Semahegn, Amare Nega, Sewmehone Siraw, Adane Gebreyohannes, Hailemariam Solomon, Tokuma Legesse, Kidanemaryam Wagaw, Temesgene Terresa, Solomon Mitiku, Yirgalem Tsehaye, Moges Mokonen, Wakjira Chifra, Habte Nida, Alemu Tirfessa
KEYWORDS:
G × E Interaction, Additive Main Effect and Multiplicative Interaction (AMMI), Genotype and Genotype by Environment (GGE), Genotypes & Stability
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.11 No.12,
December
9,
2020
ABSTRACT: Sorghum [Sorghum
bicolor (L.) Moench] is a high-yielding, nutrient-use efficient, and
drought tolerant crop that can be cultivated on over 80 per cent of the world’s
agricultural land. However, a number of biotic and abiotic factors are limiting
grain yield increase. Diseases (leaf and grain) are considered as one of the
major biotic factors hindering sorghum productivity in the highland and
intermediate altitude sorghum growing areas of Ethiopia. In addition, the yield
performance of crop varieties is highly influenced by genotype × environment (G
× E) interaction which is the major focus of researchers while generating
improved varieties. In Ethiopia, high yielding and stable varieties that
withstand biotic stress in the highland areas are limited. In line with this,
the yield performance of 21 sorghum genotypes and one standard check were
evaluated across 14 environments with the objectives of estimating magnitude G × E interaction for grain yield
and to identify high yielder and stable genotypes across environments. The
experiment was laid out using Randomized Complete Block Design with three
replications in all environments. The combined analysis of variance across
environments revealed highly significant differences among environments,
genotypes and G × E interactions of grain yield suggesting further analysis of
the G × E interaction. The results of the combined AMMI analysis of variance
indicated that the total variation in grain yield was attributed to
environments effects 71.21%, genotypes effects 4.52% and G × E interactions
effects 24.27% indicating the major sources of variation. Genotypes 2006AN7010
and 2006AN7011 were high yielder and they were stable across environments and
one variety has been released for commercial production and can be used as
parental lines for genetic improvement in the sorghum improvement program. In
general, this research study revealed the importance of evaluating sorghum
genotypes for their yield and stability across diverse highland areas of
Ethiopia before releasing for commercial production.