Abstract
Rice production is usually reduced by water stress that can evenly occur during rice cycle in West Africa under bimodal rainfall pattern. In order to determine the effects of water stress on rice grain quality, experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire. The rice varieties CG14 (Oryza glaberrima), WAB56-104 (Oryza sativa), and NERICA1 (cross WAB56-104 x CG14) were sown at 25 × 25 cm spacing during the dry season cropping period of 2000, 2001 and 2002. Irrigation line (Boon irrigation) was used to supply water until flowering stage. Water was then supply manually from the milky stage of each variety to its full ripening stage. Physical (husking yield, milling recovery, and head rice ratio), chemical (amylose and proteins contents) and cooking parameters (cooking time, volume expansion, rice flour gelatinization temperature, consistency and viscosity) of the harvested grains were determined in the laboratory. The results showed a significant difference (p < 0.05) between all the parameters in comparison with the checks samples and stressed crop. In general, NERICA 1 showed better physical and cooking quality traits than its parents. Rice samples from plots subject to lower water availability during repining stage showed higher protein content for all varieties studied. Increase in the average protein content of stressed samples were 31, 11.8 and 13.3% times, respectively for NERICA 1, CG14 and WAB56 -104, where (using the protein content of check plots as 100%) NERICA 1 showed higher husking yield, total mean milling recovery and head rice ratio for samples collected on stressed plots than the glaberrima and the sativa samples recorded on similar plots. Finding showed that cooking properties that meet West African rice consumers' preferences for cooked rice were more improved for NERICA 1 than its parents in comparison with samples collected from stressed plots. It is concluded that moisture stress at ripening stage should be further investigated as potential indirect means of improving rice grain quality.
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Claims 9
Claim · model-written summary
NERICA 1 showed better physical and cooking quality traits than its parents.
- Taxon
- rice
Oryza sativae0 - Material
- NERICA 1e1
- Outcome
- physical and cooking quality traitse1
- Direction
- bettere1
- Comparator
- its parentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“In general, NERICA 1 showed better physical and cooking quality traits than its parents”
Claim · model-written summary
Stressed crop differed significantly (p < 0.05) from check samples for all parameters.
- Taxon
- riceOryza sativae0
- Treatment
- stressed crope2
- Outcome
- all the parameterse2
- Value
- p < 0.05e2
- Comparator
- checks samplese2
- Setting
- upland sitee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
e2“The results showed a significant difference (p < 0.05) between all the parameters in comparison with the checks samples and stressed crop”
Claim · model-written summary
Rice samples from plots with lower water availability during the repining stage showed higher protein content for all varieties studied.
- Taxon
- riceOryza sativae0
- Treatment
- lower water availability during repining stagee1
- Outcome
- protein contente1
- Direction
- highere1
- Comparator
- check plotse2
- Setting
- upland sitee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“Rice samples from plots subject to lower water availability during repining stage showed higher protein content for all varieties studied”
e2“Increase in the average protein content of stressed samples were 31, 11.8 and 13.3% times, respectively for NERICA 1, CG14 and WAB56 -104, where (using the protein content of check plots as 100%)”
e3“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
Claim · model-written summary
Stressed NERICA 1 samples showed an average protein content increase of 31 (as written) relative to check plots.
- Taxon
- riceOryza sativae0
- Material
- NERICA 1e2
- Treatment
- stressed samplese2
- Outcome
- protein contente2
- Direction
- Increasee2
- Value
- 31e2
- Qualifier
- using the protein content of check plots as 100%e2
- Comparator
- check plotse2
- Setting
- upland sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
e2“Increase in the average protein content of stressed samples were 31, 11.8 and 13.3% times, respectively for NERICA 1, CG14 and WAB56 -104, where (using the protein content of check plots as 100%)”
Claim · model-written summary
Stressed CG14 samples showed an average protein content increase of 11.8 (as written) relative to check plots.
- Taxon
- riceOryza sativae0
- Material
- CG14e2
- Treatment
- stressed samplese2
- Outcome
- protein contente2
- Direction
- Increasee2
- Value
- 11.8e2
- Qualifier
- using the protein content of check plots as 100%e2
- Comparator
- check plotse2
- Setting
- upland sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
e2“Increase in the average protein content of stressed samples were 31, 11.8 and 13.3% times, respectively for NERICA 1, CG14 and WAB56 -104, where (using the protein content of check plots as 100%)”
Claim · model-written summary
Stressed WAB56 -104 samples showed an average protein content increase of 13.3% relative to check plots.
- Taxon
- riceOryza sativae0
- Material
- WAB56 -104e2
- Treatment
- stressed samplese2
- Outcome
- protein contente2
- Direction
- Increasee2
- Value
- 13.3%e2
- Qualifier
- using the protein content of check plots as 100%e2
- Comparator
- check plotse2
- Setting
- upland sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
e2“Increase in the average protein content of stressed samples were 31, 11.8 and 13.3% times, respectively for NERICA 1, CG14 and WAB56 -104, where (using the protein content of check plots as 100%)”
Claim · model-written summary
NERICA 1 samples from stressed plots showed higher husking yield, total mean milling recovery and head rice ratio than the glaberrima and sativa samples from similar plots.
- Taxon
- riceOryza sativae0
- Material
- NERICA 1e1
- Treatment
- stressed plotse1
- Outcome
- husking yield, total mean milling recovery and head rice ratioe1
- Direction
- highere1
- Comparator
- the glaberrima and the sativa samples recorded on similar plotse1
- Setting
- upland sitee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“NERICA 1 showed higher husking yield, total mean milling recovery and head rice ratio for samples collected on stressed plots than the glaberrima and the sativa samples recorded on similar plots”
e2“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
Claim · model-written summary
NERICA 1 cooking properties meeting West African consumer preferences were more improved than those of its parents in samples from stressed plots.
- Taxon
- riceOryza sativae0
- Material
- NERICA 1e1
- Treatment
- stressed plotse1
- Outcome
- cooking properties that meet West African rice consumers' preferences for cooked ricee1
- Direction
- more improvede1
- Comparator
- its parentse1
- Setting
- upland sitee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice production is usually reduced by water stress”
e1“Finding showed that cooking properties that meet West African rice consumers' preferences for cooked rice were more improved for NERICA 1 than its parents in comparison with samples collected from stressed plots”
e2“experiments were conducted on upland site (on ferralsol) at the main AfricaRice research center at M'be, 30 km North of Bouaké, Côte d'Ivoire”
Claim · model-written summary
Moisture stress at the ripening stage should be further investigated as a potential indirect means of improving rice grain quality.
- Taxon
- riceOryza sativae0
- Organ / stage
- ripening stagee0
- Treatment
- moisture stress at ripening stagee0
- Outcome
- improving rice grain qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is concluded that moisture stress at ripening stage should be further investigated as potential indirect means of improving rice grain quality”
The same questions in other papers
soil water · quality: protein · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 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.