Virulence Diversity in the Population of <i>Bipolaris sorokiniana</i>
Bibliographic record
Abstract
Spot blotch, caused by Bipolaris sorokiniana, is a damaging disease of barley in Canada, especially in the prairie region (Manitoba, Saskatchewan, and Alberta) where most of Canadian crops are produced. Considerable interaction between isolates of the pathogen and barley genotypes necessitates the evaluation of the virulence diversity in the B. sorokiniana population in order to deploy effective resistance against the pathogen. The virulence diversity of 127 B. sorokiniana isolates from Canada and other countries was evaluated on 12 barley genotypes. Different virulence patterns were detected across B. sorokiniana isolates and eight virulence groups were identified using qualitative analysis of the virulence data. Results indicate broader virulence diversity in the pathogen population in the eastern prairie region of Canada, especially in Manitoba, compared with that previously reported. One group of isolates collected from Manitoba displayed a virulence pattern which had not been reported previously. This group was moderately virulent on most differential lines, including American six-rowed barley genotypes considered to possess durable resistance against B. sorokiniana. Although the classical method of pathotype identification can be exploited to analyze interactions in the barley-B. sorokiniana pathosystem, the continuous range of infection phenotypes found suggests that a quantitative analysis of the complex interactions occurring may be warranted.
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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) | 0.000 | 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".