The application of the multivariate analysis method for some traits in wheat under drought stress
In order to evaluate the relationship between yield and some relevant traits and estimation of the most effective traits on grain yield, a split-plot experiment based on completely randomized block design with four replications was carried out in 2006-2007 in the research field of Islamic A...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
University of Belgrade - Faculty of Agriculture, Belgrade
2015-01-01
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Series: | Journal of Agricultural Sciences (Belgrade) |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-8109/2015/1450-81091504407M.pdf |
Summary: | In order to evaluate the relationship between yield and some relevant traits
and estimation of the most effective traits on grain yield, a split-plot
experiment based on completely randomized block design with four replications
was carried out in 2006-2007 in the research field of Islamic Azad University
of Karaj. The irrigation schemes scheduled as main plots included the
following: (T1) 40% moisture depletion throughout the growing season
(control); (T2) 60% moisture depletion throughout the growing season; (T3)
80% moisture depletion throughout the growing season; (T4) no irrigation
during the stem elongation stage and continuing with adequate irrigation to
the end of the growing season; (T5) no irrigation from the stem elongation
stage to the end of the growing season; (T6) no irrigation at flowering and
continuing with adequate irrigation to the end of the growing season; (T7) no
irrigation from flowering to the end of the growing season; and (T8) no
irrigation from the milk stage to the end of the growing season; and 2 wheat
cultivars [Marvdasht (V1), Chamran (V2)] as sub-plots. According to the
results of simple correlation, the grain yield exhibited the most positive
correlation with biomass (0.877), number of infertile spikelets (0.876) and
harvest index (0.855). The results of step-wise regression showed that, in
the absence of drought stress, biomass and harvest index had respectively the
most important effects on the grain yield but both exhibited different
results under drought stress. Path analysis results showed that the most
important effect on the grain yield in the total tested treatments was
related to the biomass, justifying a total of 87% of grain yield variations,
72% of which is the direct effect of this trait on grain yield. |
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ISSN: | 1450-8109 2406-0968 |