Abstract
Abstract The climate change will contribute drought and temperature extremes to rice growing systems, especially when cultivated in equatorial regions. To evaluate opportunities to cultivate and breed drought‐tolerant rice, seven rice cultivars were evaluated in Rwanda for recurring morphological drought scores, grain yield and components, and quality characteristics. The cultivation conditions, that is site and drought treatment, impacted morphological drought scores, growth and yield attributes, while cultivar affected quality attributes. Thus, site showed a higher impact on grain yield and components than drought and cultivar, with generally a reduced grain yield at the low‐temperature site, as a result of low spikelet fertility. Morphological drought scores were generally increased by drought, while drought at the reproductive stage at the high‐temperature site was negative for yield and its components. The cultivars “Intsindagirabigega” and “Jyambere” were adapted to high‐temperature site conditions. The cultivar “Intsindagirabigega” had the highest amylose content, and “Mpembuke,” the highest antioxidant capacity. Thus, climate change with increased temperature and drought extremes may increase rice productivity in cool areas, while especially drought at reproductive stage will be detrimental in low altitude areas with high temperature. Cultivar variation indicated opportunities for selection and breeding of climate change tolerant rice cultivars which should be of immediate priority.
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Claims 12
Claim · model-written summary
Site and drought treatment impacted morphological drought scores, growth and yield attributes of rice.
- Taxon
- rice
Oryza sativat0 - Treatment
- site and drought treatmente1
- Outcome
- morphological drought scores, growth and yield attributese1
- Setting
- Rwandae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“site and drought treatment, impacted morphological drought scores, growth and yield attributes”
Claim · model-written summary
Rice cultivar affected quality attributes.
- Taxon
- riceOryza sativat0
- Material
- cultivare1
- Outcome
- quality attributese1
- Setting
- Rwandae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“cultivar affected quality attributes”
Claim · model-written summary
Site had a higher impact on grain yield and components than drought and cultivar.
- Taxon
- riceOryza sativat0
- Treatment
- sitee1
- Outcome
- grain yield and componentse1
- Direction
- highere1
- Comparator
- drought and cultivare1
- Setting
- Rwandae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“site showed a higher impact on grain yield and components than drought and cultivar”
Claim · model-written summary
Grain yield was generally reduced at the low-temperature site as a result of low spikelet fertility.
- Taxon
- riceOryza sativat0
- Outcome
- grain yielde1
- Direction
- reducede1
- Qualifier
- low spikelet fertilitye1
- Setting
- low‐temperature sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“with generally a reduced grain yield at the low‐temperature site, as a result of low spikelet fertility”
Claim · model-written summary
Morphological drought scores were generally increased by drought.
- Taxon
- riceOryza sativat0
- Treatment
- droughte1
- Outcome
- Morphological drought scorese1
- Direction
- increasede1
- Setting
- Rwandae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“Morphological drought scores were generally increased by drought”
Claim · model-written summary
Drought at the reproductive stage at the high-temperature site was negative for yield and its components.
- Taxon
- riceOryza sativat0
- Treatment
- drought at the reproductive stagee1
- Outcome
- yield and its componentse1
- Direction
- negativee1
- Setting
- high‐temperature sitee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“drought at the reproductive stage at the high‐temperature site was negative for yield and its components”
Claim · model-written summary
The cultivar Intsindagirabigega was adapted to high-temperature site conditions.
- Taxon
- riceOryza sativat0
- Material
- Intsindagirabigegae1
- Outcome
- adapted to high‐temperature site conditionse1
- Setting
- high‐temperature site conditionse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“The cultivars “Intsindagirabigega” and “Jyambere” were adapted to high‐temperature site conditions”
Claim · model-written summary
The cultivar Jyambere was adapted to high-temperature site conditions.
- Taxon
- riceOryza sativat0
- Material
- Jyamberee1
- Outcome
- adapted to high‐temperature site conditionse1
- Setting
- high‐temperature site conditionse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“The cultivars “Intsindagirabigega” and “Jyambere” were adapted to high‐temperature site conditions”
Claim · model-written summary
The cultivar Intsindagirabigega had the highest amylose content.
- Taxon
- riceOryza sativat0
- Material
- Intsindagirabigegae1
- Outcome
- amylose contente1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“The cultivar “Intsindagirabigega” had the highest amylose content”
Claim · model-written summary
The cultivar Mpembuke had the highest antioxidant capacity.
- Taxon
- riceOryza sativat0
- Material
- Mpembukee1
- Outcome
- antioxidant capacitye1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1““Mpembuke,” the highest antioxidant capacity”
Claim · model-written summary
Climate change with increased temperature and drought extremes may increase rice productivity in cool areas.
- Taxon
- riceOryza sativat0
- Treatment
- increased temperature and drought extremese1
- Outcome
- rice productivitye1
- Direction
- increasee1
- Setting
- cool arease1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“climate change with increased temperature and drought extremes may increase rice productivity in cool areas”
Claim · model-written summary
Cultivar variation indicates opportunities for selection and breeding of climate change tolerant rice cultivars, which should be of immediate priority.
- Taxon
- riceOryza sativat0
- Outcome
- selection and breeding of climate change tolerant rice cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“in Rwanda”
e1“Cultivar variation indicated opportunities for selection and breeding of climate change tolerant rice cultivars which should be of immediate priority”
The same questions in other papers
drought · yield · Oryza sativa (rice)Positive and negative results
75 papers in the same direction as this paper · 246 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- positive
321 papers more in this group
See all 325 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.