Resistance and tolerance of Douglas‐fir seedlings to inoculation with the fungal root pathogen <i>Coniferiporia sulphurascens</i>
Bibliographic record
Abstract
Abstract Two‐year‐old interior Douglas‐fir seedlings in a greenhouse were artificially inoculated with Coniferiporia sulphurascens and grown for four years. The study population included 2,261 seedlings from 94 half‐sibling families distributed across four breeding zones. There was little mortality over the 4 years, but there was advanced stain internally at the root collar from infection by the fungus indicating host resistance/susceptibility. The breeding zones had no effect on stain incidence. The tallest trees had more staining, differing up to 30% incidence over the size range, and the families had at most ±6% incidence in stain from the average. Disease tolerance, assessed by height growth relative to controls, was affected by zone and family. The tallest families were the least tolerant, by at most 5% less than control tree height. There was little association between tolerance and resistance at the family level, meaning that both disease response mechanisms were likely separate. The most common response strategy at the family level was to combine higher resistance and tolerance, being about twice as common as lower resistance and tolerance trait combinations. Interior isolates of the fungus may have lower virulence than coastal isolates, which might help to explain the low genetic response to the fungus. Inoculum reduction versus tree breeding may be a better strategy for control of the disease for interior Douglas‐fir.
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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".