Abstract
Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety. Resistance in Dollard was owing to nonpreference and antibiosis. This resistance to aphids appeared to explain a much lower incidence of virus in Dollard than in Wegener when these varieties were grown under field conditions at St. Paul, Minnesota. When the mosaic and pea stunt viruses were inoculated mechanically, Dollard was just as susceptible as Wegener. Breeding red clover for resistance to aphids may be a more successful approach than trying to breed for resistance to virus diseases.
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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 5
Claim · model-written summary
Dollard red clover is more resistant to the pea aphid than Wegener.
- Taxon
- Trifolium pratense
Trifolium pratensee1 - Material
- Dollarde1
- Interactor
- Macrosiphum pisie1pest
- Outcome
- resistant to the pea aphide1
- Direction
- more resistante1
- Comparator
- Wegenere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety”
Claim · model-written summary
Resistance in Dollard is owing to nonpreference and antibiosis.
- Taxon
- Trifolium pratenseTrifolium pratensee1
- Material
- Dollarde2
- Outcome
- Resistancee2
- Qualifier
- nonpreference and antibiosise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety”
e2“Resistance in Dollard was owing to nonpreference and antibiosis”
Claim · model-written summary
Aphid resistance appears to explain a much lower virus incidence in Dollard than in Wegener under field conditions.
- Taxon
- Trifolium pratenseTrifolium pratensee1
- Material
- Dollarde3
- Interactor
- viruse3pathogen
- Outcome
- incidence of viruse3
- Direction
- lowere3
- Comparator
- Wegenere3
- Setting
- field conditions at St. Paul, Minnesotae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety”
e3“This resistance to aphids appeared to explain a much lower incidence of virus in Dollard than in Wegener when these varieties were grown under field conditions at St. Paul, Minnesota”
Claim · model-written summary
Dollard was as susceptible as Wegener to mechanically inoculated mosaic and pea stunt viruses.
- Taxon
- Trifolium pratenseTrifolium pratensee1
- Material
- Dollarde4
- Treatment
- inoculated mechanicallye4
- Interactor
- mosaic and pea stunt virusese4pathogen
- Outcome
- susceptiblee4
- Direction
- just as susceptiblee4
- Comparator
- Wegenere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety”
e4“When the mosaic and pea stunt viruses were inoculated mechanically, Dollard was just as susceptible as Wegener”
Claim · model-written summary
Breeding red clover for aphid resistance may be more successful than breeding for virus resistance.
- Taxon
- red cloverTrifolium pratensee1
- Outcome
- breeding red clover for resistance to aphidse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Plants of the Dollard variety of red clover, Trifolium pratense L., were more resistant to the pea aphid, Macrosiphum pisi (Harris), than plants of the Wegener variety”
e5“Breeding red clover for resistance to aphids may be a more successful approach than trying to breed for resistance to virus diseases”
The same questions in other papers
inoculation · disease · Trifolium pratense (red clover)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.