Abstract
The influence of temperature on development, dry matter production, grain yield, and grain yield components of a high yielding dwarf spring wheat ( Triticum aestivum L. em Thell ‘Yecora 70’) was studied at different stages of growth in the field. Crops were grown under conditions of high fertility and irrigation in northwest Mexico during 1972–73 and 1973–74. In each of four approximately 4‐week periods during the crop cycle, portions of the crop were enclosed in transparent chambers which were ventilated with cooled or heated air. Air temperatures inside the chambers averaged respectively, 1 to 2 C below or 2 to 7 C above air temperature outside. Development was retarded slightly by cooling and hastened considerably by heating. Total dry weight at maturity and grain yield were reduced by increased temperatures at any stage other than the first. The biggest effects were seen in the second and third periods (end of tillering to beginning of grain filling), where a 1 C rise in temperature was associated with a 4% reduction in grain yield. This was largely related to effects on grains/m 2 via changes in spikes/m 2 and grains/spikelet. Temperature increases during the fourth or grain‐filling period reduced kernel weight in some situations and had no effect in others. The relevance of these results to other temperature studies and to possible avenues for increasing grain yield in Yecora 70 is discussed.
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Claims 7
Claim · model-written summary
Cooling slightly retarded development.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- coolinge0
- Outcome
- Developmente0
- Direction
- retardede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Development was retarded slightly by cooling”
t0“Wheat”
Claim · model-written summary
Heating considerably hastened development.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- heatinge0
- Outcome
- hastened considerablye0
- Direction
- hastenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hastened considerably by heating”
t0“Wheat”
Claim · model-written summary
Increased temperature reduced total dry weight at maturity after the first period.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- increased temperaturese0
- Outcome
- Total dry weight at maturitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dry weight at maturity and grain yield were reduced by increased temperatures at any stage other than the first”
t0“Wheat”
Claim · model-written summary
Increased temperature reduced grain yield after the first period.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- increased temperaturese0
- Outcome
- grain yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dry weight at maturity and grain yield were reduced by increased temperatures at any stage other than the first”
t0“Wheat”
Claim · model-written summary
A 1 C temperature rise in periods two and three was associated with a 4% grain-yield reduction.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- 1 C rise in temperaturee0
- Outcome
- grain yielde0
- Direction
- reductione0
- Value
- 4%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 1 C rise in temperature was associated with a 4% reduction in grain yield”
t0“Wheat”
Claim · model-written summary
Higher temperature in grain filling reduced kernel weight in some situations.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Temperature increasese0
- Outcome
- kernel weighte0
- Direction
- reducede0
- Qualifier
- in some situationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature increases during the fourth or grain‐filling period reduced kernel weight in some situations”
t0“Wheat”
Claim · model-written summary
Higher temperature in grain filling had no effect on kernel weight in other situations.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Temperature increasese1
- Outcome
- kernel weighte1
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had no effect in others”
t0“Wheat”
e1“Temperature increases during the fourth or grain‐filling period reduced kernel weight in some situations and had no effect in others”
The same questions in other papers
processing · growth · Triticum aestivum (wheat)Positive and negative results
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See all 62 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.