Abstract
The effects of these dwarfing genes at the sd1 locus, d18-k (kotaketamanishiki dwarf) and d12 (yukara dwarf) on the chilling tolerance at the seedling stage of rice plants (Oryza sativa L.) were investigated. We used isogenic lines developed by backcrosses, and artificial or natural dwarf mutants, together with their parental varieties, i.e., ‘Fujiminori’ and ‘Shiokari’ and ‘Tamanishiki’. Chilling treatments at 2°C without illumination for three, four and five d were conducted at the 1- and/or 2-leaf stages. The chilling tolerances of the lines were evaluated by survival percentages 22 d after the treatments. The isogenic lines of the dwarfing genes at the sd1 locus showed lower survival percentages than their respective parental varieties in the 3-or 4-day treatments at the 1-leaf stage. The survival percentages of ‘Kotaketamanishiki’ and the isogenic line of ‘Shiokari’ were higher than those of their respective parental varieties through all the treatments. Fukei 71 containing d12 showed lower survival percentages than ‘Fujiminori’ in the 3- and 4-day treatments at the 1-leaf stage. It is inferred from the results in the present study that the dwarfing genes at the sd1 locus and d12 lower the chilling tolerance at the seedling stage whereas d18-k enhances it.
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Claims 6
Claim · model-written summary
Isogenic sd1-locus dwarf lines had lower chilling survival than their parental varieties in 3- or 4-day treatments at the 1-leaf stage.
- Taxon
- Rice
Oryza sativat0 - Material
- isogenic linese0
- Organ / stage
- 1-leaf stagee0
- Treatment
- Chilling treatments at 2°C without illuminatione1
- Gene
- sd1e0
- Outcome
- survival percentagese0
- Direction
- lowere0
- Comparator
- their respective parental varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isogenic lines of the dwarfing genes at the sd1 locus showed lower survival percentages than their respective parental varieties in the 3-or 4-day treatments at the 1-leaf stage”
e1“Chilling treatments at 2°C without illumination for three, four and five d”
t0“Chilling Injury at Seedling Stage in Rice”
Claim · model-written summary
Kotaketamanishiki had higher chilling survival than its parental variety across all treatments.
- Taxon
- RiceOryza sativat0
- Material
- Kotaketamanishikie0
- Treatment
- Chilling treatments at 2°C without illuminatione1
- Gene
- d18-ke2
- Outcome
- survival percentagese0
- Direction
- highere0
- Comparator
- their respective parental varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The survival percentages of ‘Kotaketamanishiki’ and the isogenic line of ‘Shiokari’ were higher than those of their respective parental varieties through all the treatments”
e1“Chilling treatments at 2°C without illumination for three, four and five d”
e2“d18-k (kotaketamanishiki dwarf)”
t0“Chilling Injury at Seedling Stage in Rice”
Claim · model-written summary
The isogenic line of Shiokari had higher chilling survival than its parental variety across all treatments.
- Taxon
- RiceOryza sativat0
- Material
- isogenic line of ‘Shiokari’e0
- Treatment
- Chilling treatments at 2°C without illuminatione1
- Outcome
- survival percentagese0
- Direction
- highere0
- Comparator
- their respective parental varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The survival percentages of ‘Kotaketamanishiki’ and the isogenic line of ‘Shiokari’ were higher than those of their respective parental varieties through all the treatments”
e1“Chilling treatments at 2°C without illumination for three, four and five d”
t0“Chilling Injury at Seedling Stage in Rice”
Claim · model-written summary
Fukei 71 carrying d12 had lower chilling survival than Fujiminori in 3- and 4-day treatments at the 1-leaf stage.
- Taxon
- RiceOryza sativat0
- Material
- Fukei 71e0
- Organ / stage
- 1-leaf stagee0
- Treatment
- Chilling treatments at 2°C without illuminatione1
- Gene
- d12e0
- Outcome
- survival percentagese0
- Direction
- lowere0
- Comparator
- Fujiminorie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fukei 71 containing d12 showed lower survival percentages than ‘Fujiminori’ in the 3- and 4-day treatments at the 1-leaf stage”
e1“Chilling treatments at 2°C without illumination for three, four and five d”
t0“Chilling Injury at Seedling Stage in Rice”
Claim · model-written summary
The sd1-locus and d12 dwarfing genes lower chilling tolerance at the seedling stage.
- Taxon
- RiceOryza sativat0
- Organ / stage
- seedling stagee0
- Gene
- sd1 locus and d12e0
- Outcome
- chilling tolerancee0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is inferred from the results in the present study that the dwarfing genes at the sd1 locus and d12 lower the chilling tolerance at the seedling stage whereas d18-k enhances it”
t0“Chilling Injury at Seedling Stage in Rice”
Claim · model-written summary
The d18-k dwarfing gene enhances chilling tolerance at the seedling stage.
- Taxon
- RiceOryza sativat0
- Organ / stage
- seedling stagee0
- Gene
- d18-ke0
- Outcome
- chilling tolerancee0
- Direction
- enhancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is inferred from the results in the present study that the dwarfing genes at the sd1 locus and d12 lower the chilling tolerance at the seedling stage whereas d18-k enhances it”
t0“Chilling Injury at Seedling Stage in Rice”
The same questions in other papers
light · survival · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
cold · survival · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.