AMMI analysis of genotype × environment interaction in bread wheat over rainfed and irrigated conditions
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2013, Vol 3, Issue 12
Abstract
In order to determine stable bread wheat accessions, field experiments were conducted with 20 genotypes for 4 consecutive years under two different irrigated and rainfed conditions. The experiment was laid out in a completely randomized block design with three replications in each environment. Combined analysis of variance showed highly significant differences for the GE interaction indicating the possibility of selection for stable entries. The results of additive main effect and multiplicative interaction (AMMI) analysis revealed that 10% of total variability was justified by the GE interaction which was 2.5 times more than that of genotypes. Ordination techniques displayed high differences for the interaction principal components (IPC1, IPC2 and IPC3), exhibiting that 83% of the GE sum of squares was justified by AMMI1, AMMI2 and AMMI3, i.e. 3.77 times more than that explained by the linear regression model displaying the relative efficiency of AMMI1 model in comparison with regression model. The results of AMMI model and biplot analysis indicated 3 stable genotypes with high grain yield and general adaptability tfor both rainfed and irrigated conditions.
Authors and Affiliations
Ezatollah Farshadfar, Bita Jamshidi, Azam Nazari
Keywords
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