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Genotype-by-Environment Interaction of Maize Testcross Hybrids Evaluated for Grain Yield Using GGE Biplots

Date: June 23,2022 |Hits: 163 Download PDF How to cite this paper

Nigus Belay

Field crops Research Program, Ethiopian Institute of Agricultural Research, Holetta Research Center, Addis Ababa, Ethiopia.

*Corresponding author: Nigus Belay


Genotype-by-environment interaction (GEI) occurs when Performance of geno-types differs across environments because of the effect of the environment on trait expression. Information on GEI would guide breeding strategy for either specific or broad adaptation. The purposes of this study were to determine the GEI and grain yield stability of maize testcross hybrids across five environments in Ethiopia based on GGE biplot analysis. 86 maize testcross hybrids and two standard checks were evaluated in 8 × 11 alpha lattice design with two replications across 5 test environments in 2010. Combined analysis of variance showed that the effects of genotypes (G), environments (E) and GEI were significant for grain yield. Genotype, environment and GEI interaction explained 7.44%, 80.64% and 11.92% of the variation in grain yield, respectively. The GGE model showed that the first and second principal component axis accounted for 64.49% and 19.61% of variability, respectively. The pattern of GEI interaction was a crossover type as revealed by differential yield ranking of the genotypes across environments. Hybrid G23 was the best performer in environments E1, E2 and E3. Hybrid G33 was identified as best-performing with best specific adaptation in environment E4, while hybrid G66 and G73 had best adaptation in E5. Test environment E1 was identified as the ideal test environment for selecting superior hybrids. Hybrid G23 and G24 were high yielding and stable across environments and should be further evaluated in multi-environment trials to facilitate their registration and commercialization.


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How to cite this paper

Genotype-by-Environment Interaction of Maize Testcross Hybrids Evaluated for Grain Yield Using GGE Biplots

How to cite this paper: Nigus Belay. (2022) Genotype-by-Environment Interaction of Maize Testcross Hybrids Evaluated for Grain Yield Using GGE Biplots. International Journal of Food Science and Agriculture6(2), 216-227.

DOI: http://dx.doi.org/10.26855/ijfsa.2022.06.012

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