Abstract
The investigation was concerned with the effects of water stress on the yield and yield components of wheat grown under rainfed conditions in Rawalakot, Pakistan. A pot experiment was conducted with four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95, tested against five irrigation levels with drought imposed at different growth stages including control, terminal drought, post-anthesis drought, three irrigations and pre-anthesis drought. The parameters studied were flag leaf area, ear stalk length, number of grains per spike and grain yield per pot. Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress. The proportional reduction in yield was 40% with three irrigations and 98% in the case of pre-anthesis drought depending upon the extent and degree of stress. Results showed that wheat could withstand and tolerate drought only up to anthesis, after which water stress resulted in the complete failure of the crop. It could be deduced that the critical stage for moisture in wheat started 60 days after germination, and became more severe at 90 days, i.e. at the anthesis stage. Among the genotypes, Inqlab-91 was found to be more tolerant of drought and could thus be a good option for further testing and recommendation for rainfed areas.
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Claims 8
Claim · model-written summary
Water stress significantly reduced flag leaf area by 14%.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- water stresse0
- Outcome
- Flag leaf areae0
- Direction
- reductione0
- Value
- 14e0
- Setting
- Pakistant0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress”
t0“Yield and yield components of wheat subjected to water stress under rainfed conditions in Pakistan”
Claim · model-written summary
Water stress significantly reduced ear stalk length by 36%.
- Taxon
- wheatTriticum aestivume0
- Treatment
- water stresse0
- Outcome
- ear stalk lengthe0
- Direction
- reductione0
- Value
- 36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress”
t0“Yield and yield components of wheat subjected to water stress under rainfed conditions in Pakistan”
Claim · model-written summary
Three irrigations were associated with a 40% yield reduction.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- three irrigationse0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 40%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportional reduction in yield was 40% with three irrigations”
t0“wheat”
Claim · model-written summary
Pre-anthesis drought was associated with a 98% yield reduction.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- pre-anthesis droughte0
- Outcome
- yieldt0
- Direction
- reductione1
- Value
- 98%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“98% in the case of pre-anthesis drought”
t0“Yield and yield components of wheat subjected to water stress under rainfed conditions in Pakistan”
e1“The proportional reduction in yield was 40% with three irrigations”
Claim · model-written summary
Wheat tolerated drought only up to anthesis; later stress caused complete crop failure.
- Taxon
- wheatTriticum aestivume0
- Outcome
- complete failure of the crope0
- Qualifier
- after which water stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat could withstand and tolerate drought only up to anthesis, after which water stress resulted in the complete failure of the crop”
Claim · model-written summary
The moisture critical stage began 60 days after germination and grew more severe at 90 days.
- Taxon
- wheatTriticum aestivume0
- Outcome
- critical stage for moisturee0
- Value
- 60 dayse0
- Qualifier
- 90 days, i.e. at the anthesis stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“critical stage for moisture in wheat started 60 days after germination, and became more severe at 90 days, i.e. at the anthesis stage”
Claim · model-written summary
Inqlab-91 was the most drought tolerant genotype.
- Taxon
- wheatTriticum aestivumt0
- Material
- Inqlab-91e0
- Outcome
- tolerant of droughte0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inqlab-91 was found to be more tolerant of drought”
t0“wheat”
Claim · model-written summary
The authors identify Inqlab-91 for further testing and recommendation in rainfed areas.
- Taxon
- wheatTriticum aestivumt0
- Material
- Inqlab-91e0
- Outcome
- further testing and recommendation for rainfed arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inqlab-91 was found to be more tolerant of drought and could thus be a good option for further testing and recommendation for rainfed areas”
t0“wheat”
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