Grain yield of wheat (Triticum aestivum L.) under long-term heat stress is sink-limited with stronger inhibition of kernel setting than grain filling

2018 ◽  
Vol 205 (1) ◽  
pp. 22-32 ◽  
Author(s):  
Birgit W. Hütsch ◽  
Dana Jahn ◽  
Sven Schubert
Keyword(s):  
Triticum Aestivum ◽  
Heat Stress ◽  
Grain Yield ◽  
Grain Filling ◽  
Triticum Aestivum L

scholarly journals Effect of long-term heat stress on grain yield, pollen grain viability and germinability in bread wheat (Triticum aestivum L.) under field conditions

Heliyon ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. e07096
Author(s):  
J.E. Shenoda ◽  
Marwa N.M.E. Sanad ◽  
Aida A. Rizkalla ◽  
S. El-Assal ◽  
Rania T. Ali ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Heat Stress ◽  
Grain Yield ◽  
Bread Wheat ◽  
Triticum Aestivum L ◽  
Pollen Grain ◽  
Field Conditions

scholarly journals Effect of Heat Stress on Inter-relationship of Physiological and Biochemical Traits with Grain Yield in Wheat (Triticum aestivum L.)

2020 ◽  
pp. 19-29
Author(s):  
Amrita Kumari ◽  
R. D. Ranjan ◽  
Chandan Roy ◽  
Awadesh Kumar Pal ◽  
S. Kumar
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Flag Leaf ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Seedling Stage ◽  
Biochemical Traits ◽  
Highly Correlated ◽  
Complex Phenomena ◽  
Physiological And Biochemical

Heat stress, particularly the stress appears at the time of flowering to grain filling stages causing severe yield loss in wheat. Heat tolerance is complex phenomena that include adjustment in morphological, physiological and biochemical traits of the crop. Present investigation was carried out to understand the effect of terminal heat stress on different traits of wheat. The experiment was conducted in three dates of sowing as timely sown, late sown and very late sown to expose the crop to heat stress at later stages of the crop growth. Significant genetic variations for all the traits evaluated under three conditions indicated the presence of variability for the traits. Trait association analysis revealed that flag leaf chlorophyll content and MSI at seedling stage; MDA at reproductive stage had direct relationship with grain yield. While under very late sown condition MDA and RWC at seedling stages were found to be highly correlated with grain yield. It indicates that MDA, RWC at seedling stage and days to booting, days to milking plays important role in very late sown condition that can be used as selection criteria in breeding programme.

scholarly journals Cell membrane stability- an important criterion for selection of heat tolerant genotypes in wheat (Triticum aestivum L.)

2017 ◽  
Vol 9 (4) ◽  
pp. 1894-1900
Author(s):  
Anzer Ul Islam ◽  
Ashok K. Chhabra ◽  
Satyaveer S. Dhanda ◽  
Renu Munjal
Keyword(s):  
Heat Stress ◽  
Cell Membrane ◽  
Grain Yield ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Membrane Stability ◽  
Filling Rate ◽  
Cell Membrane Stability ◽  
Grain Filling Rate ◽  
Heat Tolerant

Cell membrane stability, grain filling rate, grain filling duration, canopy temperature and grain yield were used to evaluate performance of 100 diverse bread wheat (Triticum aestivum L.) genotypes under timely sown and late sown heat stress conditions for two cropping season. The genotypes differed significantly for all the traits show-ing considerable variation for improvement of characters. The genotypes WH1165 had significant high grain yield (14.6* g and 11.4g) and (11.3* g and 11.4* g) followed by cell membrane stability under timely sown and heat stress conditions, respectively indicating potential tolerance against heat stress. Correlation coefficients revealed that cell membrane stability (0.451**) and (0.639**) in timely sown and in late sown conditions, respectively were the most important trait followed by grain filling rate (0.882** and 0.744**) under timely sown and late sown conditions respec-tively. Results revealed that bread wheat genotypes which had high value of cell membrane stability had high grain yield showed potential photorespiration and high grain filling rate under heat stress condition. Twenty two genotypes WH1021, WH1155, VL803, WH787, NW1014, Raj3765, HD1869, 2042, WH1124, HD2285, WH1133, HUW234, 4066, Sonak, UP2425, UP2473, PBW503, PBW373, PBW533, SGP13, HD2643 and WH789 were identified as heat tolerant genotypes based on their relative performance in yield components, grain yield and heat susceptibility indi-ces. These genotypes were found to be ideal candidates to be used in developing heat tolerant wheat varieties. Canopy temperature, membrane thermostability and grain filling rate have also shown strong correlation with grain yield. Because of this association, these traits constitute the best available ‘tool’ for genetic improvement of wheat suitable for cultivation under heat stressed environments. Thus, these could be used as indirect selection criteria for developing heat tolerant wheat genotypes that would provide sufficient yields to meet the ever increasing wheat demand.

Evaluation of the CERES and EPIC models for predicting spring wheat grain yield over time

1993 ◽  
Vol 73 (3) ◽  
pp. 713-719 ◽  
Author(s):  
A. P. Moulin ◽  
H. J. Beckie
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Simulation Models ◽  
Triticum Aestivum L ◽  
Crop Rotations ◽  
Wheat Grain ◽  
Reasonable Accuracy ◽  
Over Time

The EPIC and CERES simulation models were used to predict spring wheat (Triticum aestivum L.) grain yield from long-term (1960–1989) crop rotations at Melfort, Saskatchewan. Although both models simulated annual yields poorly, they predicted long-term mean yields with reasonable accuracy. Key words: Spring wheat, Triticum aestivum L., yield, models, CERES, EPIC

Variability in Winter Wheat (Triticum aestivum L.) Grain Yield Response to Nitrogen Fertilization in Long-Term Experiments

2020 ◽  
Vol 51 (3) ◽  
pp. 403-412
Author(s):  
Peter Omara ◽  
Lawrence Aula ◽  
Jagmandeep S. Dhillon ◽  
Fikayo Oyebiyi ◽  
Elizabeth M. Eickhoff ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Triticum Aestivum L ◽  
Yield Response ◽  
Long Term Experiments

scholarly journals Molecular investigations on grain filling rate under terminal heat stress in bread wheat (Triticum aestivum L.)

2013 ◽  
Vol 12 (28) ◽  
pp. 4439-4445 ◽  
Author(s):  
Ch Girish ◽  
P ra ◽  
ey ◽  
Rane Jagadish ◽  
Sareen Sindhu ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Heat Stress ◽  
Bread Wheat ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Filling Rate ◽  
Grain Filling Rate ◽  
Terminal Heat Stress
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