Abstract
High‐oil corn ( Zea mays L.) produced with the TopCross grain production system is planted as a physical mixture (a TC Blend) containing 91% high‐yielding, male‐sterile hybrid (grain parent) seed and 9% pollinator seed. Field experiments were conducted at two locations in Ohio in 1999 and 2000 to determine if high‐oil corn (HOC) TC Blends are more sensitive to defoliation damage than their normal‐oil corn (NOC) hybrid counterparts consisting of 100% male‐fertile plants. Corn plants were 100% defoliated at V5 and 50 and 100% defoliated at V13. Defoliation similarly affected grain yield and oil concentration of HOC TC Blends and NOC hybrids. Complete defoliation at V13, averaged across years and hybrids, was the most damaging defoliation treatment, reducing grain yields 29%. Defoliation did not significantly alter grain oil concentration of HOC grain parents (74.5 g kg −1 ) or NOC (34.5 g kg −1 ). Defoliation caused similar responses in ear weights and oil concentrations in both components (the pollinator and the grain parent) of the HOC TC Blends. The lack of hybrid × defoliation interactions for ear yield components and various agronomic traits indicates that HOC TC Blends and their respective NOC counterparts responded similarly to early‐season defoliation over a range of environmental conditions. Guidelines for assessing early‐season leaf injury in conventional corn may be suitable for assessing leaf injury in HOC TC Blends.
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Claims 6
Claim · model-written summary
Defoliation similarly affected grain yield and oil concentration of high-oil TC Blends and normal-oil hybrids in Ohio.
- Material
- HOC TC Blendse1
- Treatment
- Defoliatione1
- Outcome
- grain yield and oil concentratione1
- Comparator
- NOC hybridse1
- Setting
- Ohioe2
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zea mays L.”
e1“Defoliation similarly affected grain yield and oil concentration of HOC TC Blends and NOC hybrids”
e2“Field experiments were conducted at two locations in Ohio in 1999 and 2000”
Claim · model-written summary
Complete defoliation at V13 reduced grain yields by 29% in Ohio field experiments.
- Treatment
- Complete defoliation at V13e3
- Outcome
- grain yieldse3
- Direction
- reducinge3
- Value
- 29%e3
- Setting
- Ohioe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zea mays L.”
e2“Field experiments were conducted at two locations in Ohio in 1999 and 2000”
e3“Complete defoliation at V13, averaged across years and hybrids, was the most damaging defoliation treatment, reducing grain yields 29%”
Claim · model-written summary
Defoliation did not significantly alter grain oil concentration of high-oil grain parents in Ohio.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zea mays L.”
e2“Field experiments were conducted at two locations in Ohio in 1999 and 2000”
e4“Defoliation did not significantly alter grain oil concentration of HOC grain parents”
Claim · model-written summary
Defoliation caused similar responses in ear weights and oil concentrations of both components of high-oil TC Blends.
- Material
- HOC TC Blendse5
- Organ / stage
- eare5
- Treatment
- Defoliatione5
- Outcome
- ear weights and oil concentrationse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zea mays L.”
e5“Defoliation caused similar responses in ear weights and oil concentrations in both components (the pollinator and the grain parent) of the HOC TC Blends”
Claim · model-written summary
Guidelines for assessing early-season leaf injury in conventional corn may be suitable for assessing leaf injury in high-oil TC Blends.
Verbatim
e0“Zea mays L.”
e7“Guidelines for assessing early‐season leaf injury in conventional corn may be suitable for assessing leaf injury in HOC TC Blends”
Claim · model-written summary
High-oil TC Blends and their NOC counterparts responded similarly to early-season defoliation.
- Material
- HOC TC Blendse6
- Treatment
- early‐season defoliatione6
- Outcome
- responded similarlye6
- Comparator
- their respective NOC counterpartse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zea mays L.”
e6“HOC TC Blends and their respective NOC counterparts responded similarly to early‐season defoliation”
The same questions in other papers
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See all 174 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.