Rapid and efficient production of the <i>Pyrenophora tritici-repentis</i> teleomorph
Bibliographic record
Abstract
Laboratory conditions were identified for efficient production of the teleomorph of Pyrenophora tritici-repentis, causal agent of tan spot of wheat. Ascopcarp density (pseudothecia/cm2) and timing of ascospore maturity and discharge were determined for the fungus incubated on green or senescent maize leaves under various light regimes at 15 °C. The most rapid ascospore maturity (20 days) and discharge (26 days) occurred in a 12-h photoperiod on green leaves. However, incubation in continuous darkness increased ascocarp density. Rapid and efficient ascospore production was obtained by incubating the fungus on senescent leaves in continuous darkness for 12 days followed by a 12-h photoperiod. This resulted in ascospore discharge in 29 days from a high density of pseudothecia. Further, 95% of pseudothecia sampled contained mature ascospores at the time of first discharge. The maximum ascospore discharge height observed was 8.8 cm. Pseudothecial neck development was positively phototropic.Key words: Drechslera, ascomycete, loculascomycete, tan spot, ascospore, pseudothecium
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".