Abstract
Rice is a major grain crop in numerous countries. In lowland areas, high iron levels in the soil severely hinder its cultivation. The current study explored high-yielding and Fe-toxicity-tolerant irrigated lowland rice (340 lines) among a population derived from a cross between Suakoko 8 and Bao Thai in Edozighi and Ibadan, Nigeria. In contrast to Ibadan, the soils in Edozighi contain a significant amount of iron. For the stated purpose, we carried out a two-year experiment using an alpha lattice design. The data showed significant differences between genotypes for the days to heading, plant height, number of tillers per plant, number of panicles per plant, panicle length, and grain yield. The results revealed that multiple characteristics had both direct and indirect effects on cultivated rice yields. There was a direct and positive influence on the number of days in the 50% heading period (0.31), a direct and negative effect on plant height (-0.94), a direct and positive effect on tiller and panicle numbers, and a direct but negative effect on panicle length (-0.56). The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading. The findings showed significant changes in yield and yield characteristics between genotypes. Grain yields ranged from 283 to 11,700 kg/ha in the absence of iron in the soil, contrary to 0 to 8230 kg/ha in soil with iron toxicity, with losses estimated between 6 and 94%, demonstrating the resulting disaster. In contrast to the elite parents and varieties used in this study, the ten top genotypes exhibited smaller losses in yield. The authors strongly recommend using these lines for further studies as donors or releasing them in farmer fields in Africa.
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Claims 18
Claim · model-written summary
Rice genotypes differed significantly in heading, plant height, tillering, panicles, panicle length and yield.
- Taxon
- Rice
Oryza sativat0 - Outcome
- significant differences between genotypes for the days to heading, plant height, number of tillers per plant, number of panicles per plant, panicle length, and grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant differences between genotypes for the days to heading, plant height, number of tillers per plant, number of panicles per plant, panicle length, and grain yield”
t0“Rice”
Claim · model-written summary
Days to 50% heading had a direct positive influence on rice yield of 0.31.
- Taxon
- RiceOryza sativat0
- Organ / stage
- number of days in the 50% heading periode0
- Outcome
- cultivated rice yieldse1
- Direction
- positivee0
- Value
- 0.31e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a direct and positive influence on the number of days in the 50% heading period (0.31)”
e1“cultivated rice yields”
t0“Rice”
Claim · model-written summary
Plant height had a direct negative effect on rice yield of -0.94.
- Taxon
- RiceOryza sativat0
- Organ / stage
- plant heighte0
- Outcome
- cultivated rice yieldse1
- Direction
- negativee0
- Value
- -0.94e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a direct and negative effect on plant height (-0.94)”
e1“cultivated rice yields”
t0“Rice”
Claim · model-written summary
Tiller number had a direct positive effect on rice yield.
- Taxon
- RiceOryza sativat0
- Organ / stage
- tillere0
- Outcome
- cultivated rice yieldse1
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a direct and positive effect on tiller and panicle numbers”
e1“cultivated rice yields”
t0“Rice”
Claim · model-written summary
Panicle number had a direct positive effect on rice yield.
- Taxon
- RiceOryza sativat0
- Organ / stage
- paniclee0
- Outcome
- cultivated rice yieldse1
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a direct and positive effect on tiller and panicle numbers”
e1“cultivated rice yields”
t0“Rice”
Claim · model-written summary
Panicle length had a direct negative effect on rice yield of -0.56.
- Taxon
- RiceOryza sativat0
- Organ / stage
- panicle lengthe0
- Outcome
- cultivated rice yieldse1
- Direction
- negativee0
- Value
- -0.56e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a direct but negative effect on panicle length (-0.56)”
e1“cultivated rice yields”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was adversely correlated with yield.
- Taxon
- RiceOryza sativat0
- Outcome
- yielde0
- Direction
- adverselye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was adversely correlated with panicle length.
- Taxon
- RiceOryza sativat0
- Outcome
- panicle lengthe0
- Direction
- adverselye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was adversely correlated with plant height.
- Taxon
- RiceOryza sativat0
- Outcome
- plant heighte0
- Direction
- adverselye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was positively correlated with number of panicles.
- Taxon
- RiceOryza sativat0
- Outcome
- number of paniclese0
- Direction
- positivelye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was positively correlated with tillers.
- Taxon
- RiceOryza sativat0
- Outcome
- tillerse0
- Direction
- positivelye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
Leaf bronzing score was positively correlated with days to heading.
- Taxon
- RiceOryza sativat0
- Outcome
- days to headinge0
- Direction
- positivelye0
- Comparator
- leaf bronzing scoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf bronzing score was adversely correlated with yield, panicle length, and plant height, while it was positively correlated with the number of panicles, tillers, and days to heading”
t0“Rice”
Claim · model-written summary
In soil without iron, rice grain yields ranged from 283 to 11,700 kg/ha.
- Taxon
- RiceOryza sativat0
- Outcome
- Grain yieldse0
- Value
- 283 to 11,700 kg/hae0
- Qualifier
- absence of iron in the soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields ranged from 283 to 11,700 kg/ha in the absence of iron in the soil”
t0“Rice”
Claim · model-written summary
Under iron toxicity, rice grain yields ranged from 0 to 8230 kg/ha.
- Taxon
- RiceOryza sativat0
- Outcome
- Grain yieldse1
- Value
- 0 to 8230 kg/hae0
- Qualifier
- soil with iron toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0 to 8230 kg/ha in soil with iron toxicity”
e1“Grain yields ranged”
t0“Rice”
Claim · model-written summary
Estimated rice yield losses under iron toxicity ranged from 6 to 94%.
- Taxon
- RiceOryza sativat0
- Treatment
- iron toxicitye1
- Outcome
- lossese0
- Direction
- lossese0
- Value
- 6 and 94%e0
- Comparator
- absence of iron in the soile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“losses estimated between 6 and 94%”
e1“soil with iron toxicity”
e2“absence of iron in the soil”
t0“Rice”
Claim · model-written summary
The ten top rice genotypes lost less yield than elite parents and varieties.
- Taxon
- RiceOryza sativat0
- Material
- ten top genotypese0
- Outcome
- losses in yielde0
- Direction
- smallere0
- Comparator
- elite parents and varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast to the elite parents and varieties used in this study, the ten top genotypes exhibited smaller losses in yield”
t0“Rice”
Claim · model-written summary
The authors recommend the top lines as donors for further study.
- Taxon
- RiceOryza sativat0
- Material
- these linese0
- Outcome
- using these lines for further studies as donorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The authors strongly recommend using these lines for further studies as donors or releasing them in farmer fields in Africa”
t0“Rice”
Claim · model-written summary
The authors recommend releasing the top lines in African farmer fields.
- Taxon
- RiceOryza sativat0
- Material
- these linese0
- Outcome
- releasing them in farmer fields in Africae0
- Setting
- Africae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The authors strongly recommend using these lines for further studies as donors or releasing them in farmer fields in Africa”
t0“Rice”
The same questions in other papers
iron atom · yield · Oryza sativa (rice)Results differ
13 papers in the same direction as this paper · 57 in the opposite direction
- negative
- positive
- positive
67 papers more in this group
See all 71 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.