Inducing male sterility in <i>Brassica napus</i> L. by a sulphonylurea herbicide, tribenuron‐methyl
Bibliographic record
Abstract
Abstract A sulphonylurea herbicide, tribenuron‐methyl, methyl 2‐[[[[(4‐methoxy‐6‐methyl‐1,3,5‐triazin‐2‐yl) methylamino] carbonyl] amino] sulphonyl] benzoate, was used to induce male sterility in rapeseed. Application of 0.2 μg tribenuron‐methyl per plant at the bolting stage with the longest floral bud <2 mm and repeated 15 days afterwards, resulted in 94.5–100% plants being male sterile in six different breeding lines, but combined with low phytotoxicity. However, excessive double application of the chemical (>0.2 μg per plant) did have some significant impact on rapeseed, including stunting, fading leaves and petals, reduction in the size of floral parts and a shortened duration of flowering. The percentage of hybrid seeds from ‘84004‘ treated with 0.2 μg × 2 tribenuron‐methyl per plant and pollinated by a male parent ‘Huaye’ was 92.7%, which met the hybridity requirement in China. The results suggest that tribenuron‐methyl could be used as an efficient chemical hybridizing agent.
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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".