Deciphering Genotype × Environment Interaction of barley genotypes by AMMI and GGE analysis

Abstract:

AMMI analysis of 25 barley genotypes at 12 locations evaluation had observed the significant the effects to the tune of 50% 21.4% 3.71% by environment, interaction of genotype with environments and genotype respectively. Further the interaction effects were partitioned into six components which accounted for 90.8% of the total interactions sum of squares. The total share of first two components was of 58.9% which justified the use of PC1 and PC2 for plots. Out of 25 only G10, G12, G18, G7 genotypes had been identified by most of the measures defined on AMMI analysis. Mean vs stability analysis of GGE had observed genotypes G19, G22, G5, G7 had yields above the average values. The angle between the vector and the average environment axis reflected the representativeness of the environment, with a smaller angle of E4, E9 and E12 environments had indicated stronger representativeness. The elongated vectors of environments observed for E10, E06 and E12 explained their robust discriminative power. Genotypes like G16, G2, G17, G12 belonged close to environments E7, E8 would be good to identify for their sustainable high yield. Genotype G02 was located within the inner circle and considered to be optimal. The genotypes that exhibited close spatial closeness to the inner circle were G16, G12 and G23. A straight line angle between E6 and E12 suggested the opposite behaviour of evaluated genotypes at these two environments like of G16 with G22, G02 with G19, G23 with G5, G12 with G19.