Introgression of Resistance to Cabbage Seedpod Weevil to Canola from Yellow Mustard
Bibliographic record
Abstract
The cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), is an insect pest of major economic importance in the production of canola ( Brassica napus L. and B. rapa L.) in Europe and North America. Studies were conducted to test intergeneric germplasm, produced by crossing Sinapis alba L. (yellow mustard) × B. napus and then backcrossing progeny to the B. napus parent, as potential sources of resistance to the weevil. Of 230 intergeneric genotypes evaluated in field trials in 2001, 18 had an average of fewer than 0.05 weevil exit holes per pod, a level of resistance selected as conferring appropriate resistance and used for further testing. Subsequent tests confirmed several genotypes that evidently carried genes for resistance to C. obstrictus from the S. alba parent. In field assessments, mean exit holes per pod in the common commercial variety, B. napus cv. Q2, ranged from approximately 2.5 to 8.3 times more than those observed in the resistant lines. Some genotypes appeared to exhibit both antixenotic and antibiotic resistance to C. obstrictus , as indicated by fewer eggs laid per pod and larval development that was significantly lengthened in the resistant germplasm compared with the B. napus check. Introgression produced several genotypes with resistance to cabbage seedpod weevil that can now be crossed with agronomically superior B. napus germplasm; when the weevil‐resistant canola is available to producers it can comprise an important component in the integrated management of this pest, resulting in substantial reductions in insecticide use in this crop.
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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".