Abstract
Twenty winter wheat genotypes were evaluated under both post-anthesis drought stress and normal conditions in Ardabil Agricultural Research Station in two successive growing seasons 2005-2007 using Randomized Complete Block Design with three replications. Post-anthesis drought stress did not affect kernel number per spike. The rate of dry matter accumulation by kernels was considerably decreased by water deficit. Dry weight of vegetative organs decreased in grain filling period under stress and normal conditions, by contrast, in anthesis stage. But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition. The 1000GW and weight of kernels per spike were more severely reduced by water deficit. The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition. The negative correlation of ‘STI’ with ‘SSI’ indicated the efficiency of ‘STI’ as a selection criterion for identifying drought tolerant winter wheat genotypes with high yield potential.
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Claims 19
Claim · model-written summary
Post-anthesis drought stress did not affect wheat kernel number per spike.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Post-anthesis drought stresse0
- Outcome
- kernel number per spikee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-anthesis drought stress did not affect kernel number per spike.”
t0“wheat”
Claim · model-written summary
Water deficit considerably decreased the wheat kernel dry matter accumulation rate.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water deficite0
- Outcome
- rate of dry matter accumulation by kernelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of dry matter accumulation by kernels was considerably decreased by water deficit.”
t0“wheat”
Claim · model-written summary
Wheat vegetative organ dry weight declined in grain filling under both stress and normal conditions relative to anthesis.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- grain filling periode0
- Outcome
- Dry weight of vegetative organse0
- Direction
- decreasede0
- Qualifier
- under stress and normal conditionse0
- Comparator
- anthesis stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry weight of vegetative organs decreased in grain filling period under stress and normal conditions, by contrast, in anthesis stage.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 14 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 14e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 15 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 15e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 16 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 16e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 18 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 18e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 19 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 19e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Wheat genotype No 20 had a much higher dry matter translocation rate under drought stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- No 20e0
- Treatment
- drought stress conditione0
- Outcome
- rate of translocated dry mattere0
- Direction
- much highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But, the rate of translocated dry matter was much higher in genotypes No 14, No 15, No 16, No 18, No 19 and No 20 under drought stress condition.”
t0“wheat”
Claim · model-written summary
Water deficit more severely reduced wheat 1000GW and weight of kernels per spike.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water deficite0
- Outcome
- 1000GW and weight of kernels per spikee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1000GW and weight of kernels per spike were more severely reduced by water deficit.”
t0“wheat”
Claim · model-written summary
Wheat grain yield correlated positively with grain weight per spike.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- positive correlatione0
- Comparator
- grain weight per spikee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
Wheat grain yield correlated positively with 1000GW.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- positive correlatione0
- Comparator
- 1000GWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
Wheat grain yield correlated positively with remobilization of dry matter.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- positive correlatione0
- Comparator
- remobilization of dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
Wheat grain yield correlated positively with harvest index.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- positive correlatione0
- Comparator
- harvest indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
Wheat grain yield correlated positively with stress tolerance index (STI).
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- positive correlatione0
- Comparator
- stress tolerance index (STI)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
Wheat grain yield had a significant negative correlation with drought susceptibility index.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- negative correlatione0
- Comparator
- drought susceptibility index (SSI)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
The authors recommend selecting for high harvest index, grain weight per spike, 1000GW, dry matter remobilization and STI under stress.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive correlation of grain yield with grain weight per spike, 1000GW, remobilization of dry matter, harvest index and stress tolerance index (STI) and significant negative correlation of grain yield with drought susceptibility index (SSI) revealed that selection must be exercised for high harvest index, grain weight per spike, 1000GW, remobilization of dry matter and STI in stress condition.”
t0“wheat”
Claim · model-written summary
STI was negatively correlated with SSI in wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- ‘STI’e0
- Direction
- negative correlatione0
- Comparator
- ‘SSI’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative correlation of ‘STI’ with ‘SSI’ indicated the efficiency of ‘STI’ as a selection criterion for identifying drought tolerant winter wheat genotypes with high yield potential.”
Claim · model-written summary
The authors identify STI as an efficient selection criterion for drought tolerant high-yield wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- ‘STI’ as a selection criterione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative correlation of ‘STI’ with ‘SSI’ indicated the efficiency of ‘STI’ as a selection criterion for identifying drought tolerant winter wheat genotypes with high yield potential.”
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drought · yield · Triticum aestivum (wheat)Positive and negative results
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