Characterization of virulence and PCR-DGGE profiles of <i>Fusarium avenaceum</i> from western Canadian Prairie Ecozone of Saskatchewan
Bibliographic record
Abstract
Fusarium avenaceum isolates causing fusarium head blight (FHB) in wheat were collected from the Canadian Prairies and Mixed Wood Plains Ecozones. A total of 91 isolates were grouped into 15 phenotypes and 10 VCGs which formed seven ITS rDNA phylogenetic clades and three EF-1α PCR-DGGE groups. Variation in virulence within F. avenaceum isolates ranged from high to avirulent on wheat. In general, virulent isolates demonstrated greater host range and geographic distribution, while avirulent isolates had a limited spread. Virulent isolates demonstrated greater heat tolerance, colour plasticity and growth rate compared with avirulent isolates. Overall, data indicate that pathogen dynamics and outbreaks might be influenced by the abundance ratio of virulent/avirulent isolates related to climate characteristics of each agro-region. The characterization of F. avenaceum ‘sensu lato’ isolates, obtained from western and eastern ecozones, provided baseline information on the variation that exists for this FHB-causing species. Combined with environmental or ecological information, this knowledge could establish a consistent, long-term management of the pathogen.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 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".