Abstract
Seed-setting rate, yield components and grain quality traits of 169 accessions from an exotic rice germplasm were tested under high temperatures from 40 °C to 45 °C for 6 h during the daytime at the vegetative and reproductive stages, respectively. The results showed that heat stress significantly decreased the seed-setting rate of all the accessions, but the heat stress effects varied among accessions. Based on the decreases in seed-setting rate at high temperatures, N22 was the most tolerant, followed by AUS17, M9962, SONALEE and AUS16. Moreover, the reductions in seed-setting rate and yield under heat stress were more serious at the vegetative stage (45 d before heading) than at the booting stage (15 d before heading). In addition, heat stress also affected grain quality, especially by conferring chalkiness to most of the accessions, but SONALEE did not change much. The heat-tolerant accessions identified here and the phenotype protocols developed could be used in future genetic studies and breeding programmes focused on heat tolerance.
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Claims 8
Claim · model-written summary
Heat stress significantly decreased seed-setting rate across all rice accessions, with varying effects among accessions.
- Taxon
- rice
Oryza sativae1 - Treatment
- heat stresse0
- Outcome
- seed-setting ratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat stress significantly decreased the seed-setting rate of all the accessions, but the heat stress effects varied among accessions”
e1“exotic rice germplasm”
Claim · model-written summary
N22 was the most heat tolerant accession based on seed-setting rate decrease.
- Taxon
- riceOryza sativae1
- Material
- N22e0
- Outcome
- most tolerante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Based on the decreases in seed-setting rate at high temperatures, N22 was the most tolerant, followed by AUS17, M9962, SONALEE and AUS16”
e1“exotic rice germplasm”
Claim · model-written summary
AUS17, M9962, SONALEE and AUS16 followed N22 in heat tolerance.
- Taxon
- riceOryza sativae1
- Outcome
- followed by AUS17, M9962, SONALEE and AUS16e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N22 was the most tolerant, followed by AUS17, M9962, SONALEE and AUS16”
e1“exotic rice germplasm”
Claim · model-written summary
Heat stress reduced seed-setting rate more at the vegetative than booting stage.
- Taxon
- riceOryza sativae1
- Organ / stage
- vegetative stagee0
- Treatment
- heat stresse0
- Outcome
- seed-setting ratee0
- Direction
- more seriouse0
- Comparator
- booting stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reductions in seed-setting rate and yield under heat stress were more serious at the vegetative stage (45 d before heading) than at the booting stage (15 d before heading)”
e1“exotic rice germplasm”
Claim · model-written summary
Heat stress reduced yield more at the vegetative than booting stage.
- Taxon
- riceOryza sativae1
- Organ / stage
- vegetative stagee0
- Treatment
- heat stresse0
- Outcome
- yielde0
- Direction
- more seriouse0
- Comparator
- booting stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reductions in seed-setting rate and yield under heat stress were more serious at the vegetative stage (45 d before heading) than at the booting stage (15 d before heading)”
e1“exotic rice germplasm”
Claim · model-written summary
Heat stress caused chalkiness in most accessions.
- Taxon
- riceOryza sativae1
- Organ / stage
- graine0
- Treatment
- heat stresse0
- Outcome
- chalkinesse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat stress also affected grain quality, especially by conferring chalkiness to most of the accessions”
e1“exotic rice germplasm”
Claim · model-written summary
SONALEE grain quality changed little under heat stress.
- Taxon
- riceOryza sativae1
- Material
- SONALEEe0
- Treatment
- heat stresse0
- Outcome
- grain qualitye0
- Direction
- did not change muche0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat stress also affected grain quality, especially by conferring chalkiness to most of the accessions, but SONALEE did not change much”
e1“exotic rice germplasm”
Claim · model-written summary
The identified heat-tolerant accessions and phenotype protocols could be used in future genetic studies and breeding.
- Taxon
- riceOryza sativae1
- Outcome
- future genetic studies and breeding programmes focused on heat tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The heat-tolerant accessions identified here and the phenotype protocols developed could be used in future genetic studies and breeding programmes focused on heat tolerance.”
e1“exotic rice germplasm”
The same questions in other papers
heat · quality: grain · Oryza sativa (rice)Positive and negative results
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- negative
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- positive
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See all 195 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.