Abstract
Mohammadi, M., and R. Karimizadeh. 2012. Insight into heat tolerance and grain yield improvement in wheat in warm rainfed regions of Iran. Crop Breeding Journal 2(1): 1-8. Terminal heat and drought are the main constraints for wheat production in the vast and diverse semi-tropical rainfed regions of Iran. High temperature stress during wheat’s reproductive stage is particularly detrimental, reducing both individual kernel weight and kernel number. Identification of adapted genotypes can improve grain yield and its stability under heat stress conditions. Selection to improve grain yield and adaptation to abiotic stress is difficult, making the use of indirect selection for grain yield attractive to plant breeders. Experimental results in diverse environments have indicated remarkable variation for canopy temperature and a significant negative correlation with grain yield, particularly in warmer environments. There is also evidence that adapted wheat genotypes are able to maintain high individual kernel weight despite heat stress. Two recently released wheat cultivars for warm rainfed regions of Iran have shown high grain weight and cooler canopy temperature under different environmental conditions. Therefore, it is concluded that plump grain and cooler canopy temperature are essential traits for the adaptation of wheat genotypes in warm rainfed regions of Iran.
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Claims 6
Claim · model-written summary
Canopy temperature varied markedly across environments.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- canopy temperaturee0
- Direction
- remarkable variatione0
- Setting
- diverse environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experimental results in diverse environments have indicated remarkable variation for canopy temperature”
t0“wheat”
Claim · model-written summary
Canopy temperature correlated negatively with grain yield, especially in warmer environments.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- negativee0
- Qualifier
- warmer environmentse0
- Setting
- warmer environmentse0
Not reportedOrgan / stageComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant negative correlation with grain yield, particularly in warmer environments.”
t0“wheat”
Claim · model-written summary
Adapted wheat genotypes maintained high individual kernel weight despite heat stress.
- Taxon
- wheatTriticum aestivume0
- Material
- adapted wheat genotypese0
- Outcome
- individual kernel weighte0
- Direction
- highe0
- Qualifier
- despite heat stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adapted wheat genotypes are able to maintain high individual kernel weight despite heat stress.”
Claim · model-written summary
Two released wheat cultivars had high grain weight under varied conditions.
- Taxon
- wheatTriticum aestivume0
- Material
- Two recently released wheat cultivarse0
- Outcome
- grain weighte0
- Direction
- highe0
- Setting
- warm rainfed regions of Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two recently released wheat cultivars for warm rainfed regions of Iran have shown high grain weight and cooler canopy temperature under different environmental conditions.”
Claim · model-written summary
The same two cultivars had cooler canopy temperature under varied conditions.
- Taxon
- wheatTriticum aestivume0
- Material
- Two recently released wheat cultivarse0
- Outcome
- canopy temperaturee0
- Direction
- coolere0
- Setting
- warm rainfed regions of Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two recently released wheat cultivars for warm rainfed regions of Iran have shown high grain weight and cooler canopy temperature under different environmental conditions.”
Claim · model-written summary
The authors identify plump grain and cooler canopy temperature as essential adaptation traits.
- Taxon
- wheatTriticum aestivume0
- Outcome
- plump grain and cooler canopy temperature are essential traitse0
- Setting
- warm rainfed regions of Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plump grain and cooler canopy temperature are essential traits for the adaptation of wheat genotypes in warm rainfed regions of Iran.”