Abstract
The soybean cyst nematode ( Heterodera glycines Ichinohe) is the main yield limiting pathogen of soybean [ Glycine max (L.) Merr.] in the USA. Resistant cultivars are the most efficient management tool today. Our research studied the physiological basis of yield differences between H. glycines ‐susceptible and H. glycines ‐resistant cultivars developed from the Hartwig, PI 88788, and Peking sources of resistance at two locations in Iowa during 2005 and 2006. Supplementing resistance with chemical control may improve soybean yield and/or nematode control, so nematicide application {aldicarb[2‐methyl‐2 (methylthio) propionaldehyde O ‐(methylcarbamoyl) oxime]} was included as an experimental factor. Aldicarb increased total plant biomass by 9% during R1–R5 soybean growth stages, but there was no increase in seed yield. Yields of the resistant cultivars were greater than those of the susceptible cultivars, except for the Peking source. Compared with the susceptible cultivars, cultivars with H. glycines resistance from PI 88788 had a 13% increase in yield associated with a 15% increase in growth during R1–R5. In cultivars with resistance from Hartwig, a 6% increase in yield was associated with a 4% increase in R1–R5 duration and increased seed‐set efficiency. This work demonstrates that yield increases due to resistance to H. glycines can be attained by different physiological mechanisms associated with the different resistance sources and probably are controlled by different genes. This opens the possibility of pyramiding genes conferring resistance by different mechanisms.
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Claims 8
Claim · model-written summary
Aldicarb increased soybean biomass by 9% during R1–R5.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- R1–R5 soybean growth stagese1
- Treatment
- Aldicarbe1
- Outcome
- total plant biomasse1
- Direction
- increasede1
- Value
- 9%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“Aldicarb increased total plant biomass by 9% during R1–R5 soybean growth stages”
Claim · model-written summary
Aldicarb did not increase soybean seed yield.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Aldicarbe1
- Outcome
- seed yielde1
- Direction
- no increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“Aldicarb increased total plant biomass by 9% during R1–R5 soybean growth stages, but there was no increase in seed yield.”
Claim · model-written summary
Resistant cultivars yielded more than susceptible cultivars except for the Peking source.
- Taxon
- soybeanGlycine maxe0
- Material
- resistant cultivarse1
- Outcome
- Yieldse1
- Direction
- greatere1
- Qualifier
- except for the Peking sourcee1
- Comparator
- susceptible cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“Yields of the resistant cultivars were greater than those of the susceptible cultivars, except for the Peking source.”
Claim · model-written summary
PI 88788 resistance was associated with 13% greater yield than susceptible cultivars.
- Taxon
- soybeanGlycine maxe0
- Material
- PI 88788e1
- Interactor
- H. glycines
Heterodera glycinese1pathogen - Outcome
- yielde1
- Direction
- increasee1
- Value
- 13%e1
- Comparator
- susceptible cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“Compared with the susceptible cultivars, cultivars with H. glycines resistance from PI 88788 had a 13% increase in yield associated with a 15% increase in growth during R1–R5.”
Claim · model-written summary
PI 88788 resistance was associated with 15% greater growth during R1–R5.
- Taxon
- soybeanGlycine maxe0
- Material
- PI 88788e1
- Interactor
- H. glycinesHeterodera glycinese1pathogen
- Outcome
- growthe1
- Direction
- increasee1
- Value
- 15%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“Compared with the susceptible cultivars, cultivars with H. glycines resistance from PI 88788 had a 13% increase in yield associated with a 15% increase in growth during R1–R5.”
Claim · model-written summary
Hartwig resistance was associated with a 6% increase in yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“In cultivars with resistance from Hartwig, a 6% increase in yield was associated with a 4% increase in R1–R5 duration and increased seed‐set efficiency.”
Claim · model-written summary
Hartwig resistance was associated with a 4% increase in R1–R5 duration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“In cultivars with resistance from Hartwig, a 6% increase in yield was associated with a 4% increase in R1–R5 duration and increased seed‐set efficiency.”
Claim · model-written summary
Hartwig resistance was associated with increased seed-set efficiency.
- Taxon
- soybeanGlycine maxe0
- Material
- Hartwige1
- Outcome
- seed‐set efficiencye1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.]”
e1“In cultivars with resistance from Hartwig, a 6% increase in yield was associated with a 4% increase in R1–R5 duration and increased seed‐set efficiency.”
The same questions in other papers
aldicarb · yield · Glycine max (soybean)Results differ
2 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
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See all 14 papers →aldicarb · growth · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.