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Differential reaction of wheat cultivars to hot environments
Year:
1986
Source of publication :
Euphytica
Authors :
Shpiler, Lev
;
.
Volume :
35
Co-Authors:
Shpiler, L., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Blum, A., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Facilitators :
From page:
483
To page:
492
(
Total pages:
10
)
Abstract:
Ten to 20 spring wheat (Triticum aestivum L.) cultivars of Israeli origin were grown in three winter (normal) and two summer (abnormal) growing seasons. During the period of emergence to anthesis mean daily temperature was on the average 12°C higher and photoperiod was about 3 h longer in the summer than in the winter. Data was collected on the durations of the periods from emergence to double-ridge (GS1), double ridge to anthesis (GS2) and anthesis to grain maturation (GS3), as well as on yield and yield components. The duration of all developmental stages was reduced by high temperature. While the duration of GS2 was the most thermo-sensitive, it may also have been reduced by the longer summer photoperiod. The effect of photoperiod on GS2 could not be isolated, but the results were interpreted to show that the effect of photoperiod on the duration of GS2 was relatively small. The most heat-affected yield component was number of grains per spikelet and the least affected component was the number of spikes per plant. High temperature reduced grain weight via reduced grain growth duration and not grain growth rate. A general linear regression model of yield on its components revealed that while variation for number of spikes per plant had the greatest effect on yield variation among cultivars in the winter, variation for number of grains per spikelet and spikelets per spike were by far the most important in the summer. Grain weight was the least important component, in this respect, in all seasons. Varieties which sustained the highest yield in hot environments were able to maintain the longest duration of GS2 and the highest number of grain per spike. © 1986 Veenman B.V.
Note:
Related Files :
Development
Differentiation
grain yield components
heat resistance
Phenology
Stability
Triticum aestivum
Show More
Related Content
More details
DOI :
10.1007/BF00021856
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29405
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
Scientific Publication
Differential reaction of wheat cultivars to hot environments
35
Shpiler, L., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Blum, A., Department of Field Crops, The Volcani Center, ARO, POB 6, Bet Dagan, Israel
Differential reaction of wheat cultivars to hot environments
Ten to 20 spring wheat (Triticum aestivum L.) cultivars of Israeli origin were grown in three winter (normal) and two summer (abnormal) growing seasons. During the period of emergence to anthesis mean daily temperature was on the average 12°C higher and photoperiod was about 3 h longer in the summer than in the winter. Data was collected on the durations of the periods from emergence to double-ridge (GS1), double ridge to anthesis (GS2) and anthesis to grain maturation (GS3), as well as on yield and yield components. The duration of all developmental stages was reduced by high temperature. While the duration of GS2 was the most thermo-sensitive, it may also have been reduced by the longer summer photoperiod. The effect of photoperiod on GS2 could not be isolated, but the results were interpreted to show that the effect of photoperiod on the duration of GS2 was relatively small. The most heat-affected yield component was number of grains per spikelet and the least affected component was the number of spikes per plant. High temperature reduced grain weight via reduced grain growth duration and not grain growth rate. A general linear regression model of yield on its components revealed that while variation for number of spikes per plant had the greatest effect on yield variation among cultivars in the winter, variation for number of grains per spikelet and spikelets per spike were by far the most important in the summer. Grain weight was the least important component, in this respect, in all seasons. Varieties which sustained the highest yield in hot environments were able to maintain the longest duration of GS2 and the highest number of grain per spike. © 1986 Veenman B.V.
Scientific Publication
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