Abstract
The responses of yield and yield components of 24 advanced bread wheat genotypes to pre- and post-anthesis drought stress conditions were studied at Ardabil Agricultural Research Station during the 1997-2000 cropping seasons. Results showed that genotypes produced signif icantly lower spikes No./m 2 , seeds No./spike and grain yield under prethan in post-anthesis drought stress conditions. However, an average of 1,000 kernel weight of genotypes under pre-anthesis was higher than under non-stress and postanthesis drought stress conditions. Selection based on TOL and SSI identified the drought tolerant genotypes with low grain yield. However, selection based on MP, G MP and STI identif ied drought tolerant genotypes with a high yield. G enotypes No. 13, 14 and 21 were determined as desirable genotypes based on their high grain yield under non-stress, preanthesis and post-anthesis drought stress conditions. The interaction eff ect of genotype x year was signif icant f or membrane stability and membrane damage, however, the interaction eff ect of genotypes × stages of measurement (booting and heading) were not signif icant. On the basis of these results, genotypes No. 13, 14 and 21 with low membrane damage were also identified as drought tolerant genotypes. It can be concluded that the laboratory test can be an usef ul tool in a breeding program f or improving drought tolerance in wheat.
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Claims 9
Claim · model-written summary
Pre-anthesis drought reduced spikes, seeds per spike, and yield relative to post-anthesis drought.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- prethane0
- Outcome
- spikes No./m 2 , seeds No./spike and grain yielde0
- Direction
- lowere0
- Comparator
- post-anthesis drought stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes produced signif icantly lower spikes No./m 2 , seeds No./spike and grain yield under prethan in post-anthesis drought stress conditions”
t0“Wheat”
Claim · model-written summary
Pre-anthesis drought gave higher thousand kernel weight than non-stress or postanthesis drought.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- pre-anthesise0
- Outcome
- 1,000 kernel weighte0
- Direction
- highere0
- Comparator
- non-stress and postanthesis drought stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an average of 1,000 kernel weight of genotypes under pre-anthesis was higher than under non-stress and postanthesis drought stress conditions”
t0“Wheat”
Claim · model-written summary
TOL and SSI selected drought-tolerant genotypes with low yield.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- drought tolerant genotypes with low grain yielde0
- Comparator
- TOL and SSIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selection based on TOL and SSI identified the drought tolerant genotypes with low grain yield”
t0“Wheat”
Claim · model-written summary
MP, G MP and STI selected drought-tolerant genotypes with high yield.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- drought tolerant genotypes with a high yielde0
- Comparator
- MP, G MP and STIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection based on MP, G MP and STI identif ied drought tolerant genotypes with a high yield”
t0“Wheat”
Claim · model-written summary
Genotypes 13, 14 and 21 were desirable for high grain yield across conditions.
- Taxon
- WheatTriticum aestivumt0
- Material
- G enotypes No. 13, 14 and 21e0
- Outcome
- high grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“G enotypes No. 13, 14 and 21 were determined as desirable genotypes based on their high grain yield under non-stress, preanthesis and post-anthesis drought stress conditions”
t0“Wheat”
Claim · model-written summary
Genotype by year interaction was significant for membrane stability and damage.
- Taxon
- WheatTriticum aestivumt0
- Material
- genotypee0
- Outcome
- membrane stability and membrane damagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction eff ect of genotype x year was signif icant f or membrane stability and membrane damage”
t0“Wheat”
Claim · model-written summary
Genotype by measurement stage interaction was not significant.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- booting and headinge0
- Outcome
- interaction eff ecte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction eff ect of genotypes × stages of measurement (booting and heading) were not signif icant”
t0“Wheat”
Claim · model-written summary
Genotypes 13, 14 and 21 had low membrane damage and were drought tolerant.
- Taxon
- WheatTriticum aestivumt0
- Material
- genotypes No. 13, 14 and 21e0
- Outcome
- low membrane damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes No. 13, 14 and 21 with low membrane damage were also identified as drought tolerant genotypes”
t0“Wheat”
Claim · model-written summary
The laboratory test was judged useful in wheat drought-tolerance breeding.
- Taxon
- wheatTriticum aestivume0
- Outcome
- usef ul toole0
- Comparator
- breeding programe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“laboratory test can be an usef ul tool in a breeding program f or improving drought tolerance in wheat”