Abstract
Three sets of field experiments were conducted between 2006 and 2008 at Africa Rice Center (AfricaRice) research station, Togoudo, Benin to evaluate the effect of drought on some rice (Oryza spp.) traits according to their drought-tolerance levels. Three genotype types — interspecific lines (202) adapted to upland conditions, introgression lines (set of overlapping chromosome segment substitution lines) (60) made for lowland conditions, and O. glaberrima Steud. (211 accessions) — were evaluated. There was a consistent negative effect of drought on plant height and grain yield across genotypes’ drought-tolerance levels and also across genotype types. Plant height (up to 20.9 cm reduction) and grain yield (up to 1700.8 kg/ha reduction) were more reduced for sensitive genotypes than for moderately tolerant (maximum reductions of 14.9 cm and 1509.5 kg/ha) and tolerant genotypes (maximum reductions of 14.0 cm and 972.8 kg/ha). Flowering (start, 50%, and 100%) and maturity were consistently delayed across genotype types and tolerance levels. Mean delays of 6.5, 21.8, and 9.4 days were observed for start, 50%, and 100% flowering, respectively. Maturity was also delayed, with consistency across genotype types. However, no clear picture of the drought effect on flowering and maturity was observed in terms of differences among drought-tolerance levels. The effects of drought on the number of tillers and on leaf temperature were not consistent. Plant height and grain yield showed the clearest differences between genotype-tolerance levels in the genetic material evaluated. The study identified genotypes 151-3-8, 104-3-5, 116-2-4, 117-2-6, MPL-15-3, MPL-202-3, SEN-L21-2, SENL-10-1, SENL-17-2, SENL-26-3, TOG5691, TOG6679 and TOG5591 as with higher grain yield potential than the parents and checks used in the experiments.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Drought reduced plant height more in sensitive rice genotypes than in moderately tolerant and tolerant genotypes (up to 20.9 cm).
- Material
- sensitive genotypese1
- Treatment
- droughte0
- Outcome
- Plant heighte1
- Direction
- more reducede1
- Value
- 20.9 cme1
- Comparator
- moderately tolerante1
- Setting
- Africa Rice Center (AfricaRice) research station, Togoudo, Benine2
OryzaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e1“Plant height (up to 20.9 cm reduction) and grain yield (up to 1700.8 kg/ha reduction) were more reduced for sensitive genotypes than for moderately tolerant (maximum reductions of 14.9 cm and 1509.5 kg/ha) and tolerant genotypes (maximum reductions of 14.0 cm and 972.8 kg/ha)”
e2“Africa Rice Center (AfricaRice) research station, Togoudo, Benin”
Claim · model-written summary
Drought reduced grain yield more in sensitive rice genotypes than in moderately tolerant and tolerant genotypes (up to 1700.8 kg/ha).
- Material
- sensitive genotypese1
- Treatment
- droughte0
- Outcome
- grain yielde1
- Direction
- more reducede1
- Value
- 1700.8 kg/hae1
- Comparator
- moderately tolerante1
- Setting
- Africa Rice Center (AfricaRice) research station, Togoudo, Benine2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e1“Plant height (up to 20.9 cm reduction) and grain yield (up to 1700.8 kg/ha reduction) were more reduced for sensitive genotypes than for moderately tolerant (maximum reductions of 14.9 cm and 1509.5 kg/ha) and tolerant genotypes (maximum reductions of 14.0 cm and 972.8 kg/ha)”
e2“Africa Rice Center (AfricaRice) research station, Togoudo, Benin”
Claim · model-written summary
Drought delayed start of flowering by a mean of 6.5 days in rice.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e3“Flowering (start, 50%, and 100%) and maturity were consistently delayed across genotype types and tolerance levels”
e4“Mean delays of 6.5, 21.8, and 9.4 days were observed for start, 50%, and 100% flowering”
Claim · model-written summary
Drought delayed 50% flowering by a mean of 21.8 days in rice.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e3“Flowering (start, 50%, and 100%) and maturity were consistently delayed across genotype types and tolerance levels”
e4“Mean delays of 6.5, 21.8, and 9.4 days were observed for start, 50%, and 100% flowering”
Claim · model-written summary
Drought delayed 100% flowering by a mean of 9.4 days in rice.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e3“Flowering (start, 50%, and 100%) and maturity were consistently delayed across genotype types and tolerance levels”
e4“Mean delays of 6.5, 21.8, and 9.4 days were observed for start, 50%, and 100% flowering”
Claim · model-written summary
Drought delayed maturity in rice across genotype types.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e5“Maturity was also delayed, with consistency across genotype types”
Claim · model-written summary
No clear drought effect on flowering and maturity differed among drought-tolerance levels in rice.
- Outcome
- drought effect on flowering and maturitye6
- Qualifier
- differences among drought-tolerance levelse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e6“However, no clear picture of the drought effect on flowering and maturity was observed in terms of differences among drought-tolerance levels”
Claim · model-written summary
Drought effects on the number of tillers and on leaf temperature were not consistent in rice.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e7“The effects of drought on the number of tillers and on leaf temperature were not consistent”
Claim · model-written summary
Plant height and grain yield showed the clearest differences between genotype-tolerance levels.
- Outcome
- Plant height and grain yielde1
- Qualifier
- the clearest differences between genotype-tolerance levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e1“Plant height and grain yield showed the clearest differences between genotype-tolerance levels in the genetic material evaluated”
Claim · model-written summary
Thirteen rice genotypes had higher grain yield potential than the parents and checks used.
- Material
- 151-3-8, 104-3-5, 116-2-4, 117-2-6, MPL-15-3, MPL-202-3, SEN-L21-2, SENL-10-1, SENL-17-2, SENL-26-3, TOG5691, TOG6679 and TOG5591e1
- Outcome
- grain yield potentiale1
- Direction
- highere1
- Comparator
- the parents and checkse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of drought on some rice (Oryza spp.) traits”
e1“The study identified genotypes 151-3-8, 104-3-5, 116-2-4, 117-2-6, MPL-15-3, MPL-202-3, SEN-L21-2, SENL-10-1, SENL-17-2, SENL-26-3, TOG5691, TOG6679 and TOG5591 as with higher grain yield potential than the parents and checks used in the experiments”