Comparative virulence of chlorosis-inducing races of<i>Pyrenophora tritici-repentis</i>
Why this work is in the frame
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Bibliographic record
Abstract
The fungal pathogen Pyrenophora tritici-repentis (Died.) Drechs. causes tan spot, an important foliar disease of wheat worldwide. To date, five races of this pathogen have been described. We report the existence of a sixth race and compare the chlorosis symptoms produced by various isolates of P. tritici-repentis representing different races. Isolate Alg-H2, collected in eastern Algeria, has a virulence pattern that combines those of races 3 and 5. Thus, we propose that this isolate be classified in a new race, designated race 6. Isolate 92-171R5, collected on the Manitoba—Saskatchewan border, possesses the same virulence pattern as race 5 isolates but is much less aggressive based on the size of the lesions and the extent of the chlorosis it causes. Ptr ToxB was purified from Alg-H2 culture filtrate, following essentially the same protocol as reported earlier for its purification from race 5 isolate Alg 3-24. The presence of a toxic principle, with the same specificity as Ptr ToxB, was also demonstrated in 92-171R5 culture filtrate.
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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 it