Abstract:
To evaluate genotype × environment interaction (GEI
) of grapevine, 20 genotypes of
grapevines with Russian origin were evaluated at on
e location in Urmia and four locations
in Takestan (two locations under full irrigation an
d two locations under drought stress).
This research was performed in a randomized complet
e block design with three
replications and three vines in each plot, in 2012-
2013 season. Data on fruit yield (kg/vine)
of the grapevine genotypes grown at different test
locations were recorded and subjected
to stability analysis by nonparametric methods. Res
ult of the combined ANOVA revealed
that variances due to genotypes, environments, and
genotype-environment interactions
were highly significant. Significant genotypic vari
ance indicated genetic diversity among
genotypes yield. The highest S
i
(1)
and S
i
(2)
mean absolute rank was observed for genotypes
Ramfi TCXA, Apozoski Ramfi, X45 and Anapiski Ramfli
, indicating the high instability
of these genotypes. Among the individual Z values,
it was found that genotypes Ramfi
TCXA, Uzbakestan Moscat, Bli Ramfi, Apozoski Ramfi
and Anapiski Ramfli were
significantly stable relative to the others, of whi
ch the Z
i
(1)
and Z
i
(2)
values were greater
than the table
χ
2
(0.05, 1)
(3.84). The genotypes Skieve and Gezgiski Ramfi ran
ked the first
and second, respectively, according to S
i
(3)
, while, according to S
i
(6)
, genotypes Skieve and
Uzbakestan Moscat ranked the first and second, resp
ectively. Genotypes Uzbakestan
Moscat, Bli Ramfi and Kishmish Ramfi Azos, respecti
vely, had the highest stability and
lowest changes in different environments and were r
ecommendable as stable genotypes in
different areas
.
But, it should be noted that yield of these genoty
pes was moderate
.
Genotype Muscat had a high yield and moderate stabi
lity. As a result, these genotypes
(Uzbakestan Moscat, Bli Ramfi, Skieve, Muscat and K
ishmish Ramfi Azos) indicated
greater resistance to environmental fluctuation and
, therefore, increasing specificity of
adaptability to low yielding environments.
Keywords:
Adaptation, Biplot, Multi-environmental trials, Ran
king, Stability Analysis.
