Abstract:
The goal of this research was to assess the stability and yield performance of 150 durum
wheat genotypes in multi
-
environment trials in two locatio
ns (Diyarbakir and Kiziltepe),
in 2011
-
2012, and 2012
-
2013 growing seasons. The trials were designed by Lattice
Experimental Design with two replications (incomplete block design). The AMMI
(Additive Main Effects and Multiplicative Interaction) and GEI (Ge
notype×Environment
Interaction) analysis were used in the study to estimate GEI effects on grain yield, because
of plant breeders’ great interest
in these models for breeding programs. AMMI
evaluation indicated that genotypes made the most important contri
butions to treatments
Sum of Squares (59.8%), environments (3.5%), and GEI (36.7%), respectively, suggesting
that grain yield had been affected by environment. IPCA 1 and IPCA 2 axes (Principal
Component) were significant as
P
< 0.01 and explained 63.8 and
36.2%, respectively.
Results showed that Kiziltepe 2013 was more stable and high yielding, meanwhile
Diyarbakir 2012 and Diyarbakir 2013 environments were unstable and low yielding.
According to stability variance, usually the province lines were more prod
uctive and
stable than some old cultivars and many landraces/genotypes. Moreover, genotype G24
was more effective in all environments. The GEI model according to AMMI analysis
suggested that this genotype can be considered as a candidate, due to extensive
adaptability and high performances in all environments.
Keywords:
AMMI, GGE biplot,
Rain fed wheat, Stability.
