Abstract
Plasmodiophora brassicae, the cause of clubroot of crucifers, is an increasingly important pathogen of canola (Brassica napus) in Alberta, Canada. In response, clubroot-resistant canola genotypes are being deployed to help reduce yield losses. Two experiments were conducted to examine the effect on P. brassicae virulence of repeated exposure of a population and single-spore isolate of the pathogen to the same host. The first experiment examined changes in the index of disease over five cycles of infection on seven Brassica hosts (European Clubroot Differential [ECD] 02, ECD 04, ECD 05, ECD 15, '45H26', '45H29', and 08N823R). The second experiment tested the virulence of five cycled populations ('45H29', 08N823R, ECD 05, and ECD 15) and three cycled single-spore isolates ('45H29', 08N823R, and ECD05) on four resistant canola genotypes ('73-77', '73-67', VT-SD-09, and '9558C'). The results from these experiments clearly demonstrate the ability of both single-spore isolates and populations of P. brassicae to rapidly erode the resistance present in the two canola genotypes, '45H29' and 08N823R. Although the index of disease increased on these two genotypes, the four resistant canola genotypes remained resistant to all the cycled populations and single-spore isolates in the second experiment. These results underscore the importance of crop rotation in the management of clubroot in Alberta.
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Claims 4
Claim · model-written summary
Cycled P. brassicae isolates and populations eroded resistance in two canola genotypes.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Material
- '45H29' and 08N823Re0
- Treatment
- single-spore isolates and populations of P. brassicaee0
- Interactor
- P. brassicae
.jpg?width=60)
Plasmodiophora brassicaee0pathogen - Outcome
- resistancee0
- Direction
- erodee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
.jpg?width=500)
Verbatim
e0“both single-spore isolates and populations of P. brassicae to rapidly erode the resistance present in the two canola genotypes, '45H29' and 08N823R.”
Claim · model-written summary
Disease index increased on the two canola genotypes.
- Taxon
- canolaBrassica napus var. napuse0
- Interactor
- Plasmodiophora brassicaePlasmodiophora brassicaet0pathogen
- Outcome
- index of diseasee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although the index of disease increased on these two genotypes, the four resistant canola genotypes remained resistant to all the cycled populations and single-spore isolates in the second experiment.”
t0“Plasmodiophora brassicae”
Claim · model-written summary
Four resistant canola genotypes remained resistant to cycled populations and isolates.
- Taxon
- canolaBrassica napus var. napuse0
- Interactor
- Plasmodiophora brassicaePlasmodiophora brassicaet0pathogen
- Outcome
- remained resistante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the four resistant canola genotypes remained resistant to all the cycled populations and single-spore isolates in the second experiment.”
t0“Plasmodiophora brassicae”
Claim · model-written summary
The authors emphasized crop rotation for clubroot management in Alberta.
- Taxon
- canolaBrassica napus var. napuse1
- Interactor
- Plasmodiophora brassicaePlasmodiophora brassicaee2pathogen
- Outcome
- crop rotatione0
- Setting
- Albertae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results underscore the importance of crop rotation in the management of clubroot in Alberta.”
e1“pathogen of canola (Brassica napus) in Alberta, Canada”
e2“Plasmodiophora brassicae, the cause of clubroot of crucifers”
The same questions in other papers
Plasmodiophora brassicae · disease · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.