|
Full Length Research Paper
|
|
Genotype x Environment
interaction for quality traits in durum wheat cultivars
adapted to different environments
M. Taghouti1,
F. Gaboun1, N. Nsarellah2, R. Rhrib1,
M. El-Haila1, M. Kamar1, F.
Abbad-Andaloussi1 and S. M. Udupa3*
1Institut
National de la Recherche Agronomique (INRA), B.P. 415,
Rabat, Morocco.
2Institut
National de la Recherche Agronomique (INRA), B.P. 589,
Settat, Morocco.
3ICARDA-INRA
Cooperative Research Project, International Center for
Agricultural Research in the Dry Areas (ICARDA), B.P. 6299,
Rabat, Morocco.
*Corresponding author. E-mail:
S.Udupa@cgiar.org
Abbreviations: SDS,
Sodium dodecyl sulfate; AMMI, additive main effects
and multiplicative interaction; PCA, principal
component analysis; PC, protein content; TW,
test weight.
Accepted
11 February, 2010 |
|
|
|
Abstract |
|
|
The quality
traits of durum wheat are important for the utilization by
the industries. These traits may be influenced by genotype
and interaction of genotype and environment (GxE). To In
this study, we evaluate the effects of genotype, environment
and genotype x environment interaction on quality traits
such as vitreousness, SDS sedimentation test, yellow pigment
index, protein content and test weight, twelve Moroccan
durum wheat cultivars representing a range of agronomic
adaptation were tested in five locations representing a
range of environments induring three growing seasons, on
quality traits such as vitreousness, SDS sedimentation test,
yellow pigment index, protein content and test weight of
twelve Moroccan durum wheat cultivars representing a range
of agronomic adaptation and quality characteristics.
Theseasons. The results indicated significant effects of
genotype, environment and GxE for all the quality traits.
The extent of these effects differed; for SDS sedimentation
volumes, yellow pigment and test weight, the component of
variation due to genotype was larger than due to the
environment, indicating the greater influence of genotypes
on these traits. However, for vitreousness and protein
content, the effect of environment was higher than the
effect due to genotypes. Thus, these traits are controlled
greatly by environmental effects than genetics. The
variation due to GxE was higher than that of genotype for
vitreousness and test weight, indicating high GxE
interaction effect and less genotypic stability for these
traits. For protein content, where the environmental effect
was greater than that of genotype and GxE effect, multiple
environmental trials are necessary in order to determine
protein content of a cultivar. For other traits, preliminary
evaluations can be done in one environment and good
performing ones can be selected for multiple environmental
trials.
Key words: Durum wheat, grain quality traits, GxE
interaction. |
|
