Virulence of isolates of Albugo Candida from western Canada to Brassica species
Bibliographic record
Abstract
Isolates of Albugo Candida, collected from different geographical locations in western Canada, were tested for virulence on a set of differentials from Brassica species to determine the variability and distribution of different races and pathotypes. Most isolates were classified as race 7 based on virulence to Brassica rapa accessions and these could be subdivided broadly into two pathotypes, 7A or 7V, on the basis of their virulence to B. rapa cvs. Torch and Reward. Some isolates were classified as race 2 based on virulence to Brassica juncea and these could also be subdivided into pathotypes, 2A or 2V, based on their virulence to B. juncea cvs. Burgonde and Cutlass. The predominant pathotype was 7V. Two isolates of race 7, 28-7 and 29-1, appeared to be less virulent as they were avirulent on all of the differentials except rapid-cycling B. rapa accession CrGCl-18. Race 7 was most prevalent in collections from Alberta and Manitoba. In British Columbia, pathotypes 2A, 2V, 7A, and 7V were commonly observed and about 50% of the sample collections were mixtures of races 2 and 7. A few single pustule isolates from the Peace River region of Alberta and British Columbia appear to be hybrid pathotypes combining virulence characteristics of pathotypes 2A or 2V with 7A or 7V. These isolates are pathogenic on both B. juncea and B. rapa cultivars.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".