Rapid and Effective Germination Methods for Overcoming Seed Dormancy in Annual Canarygrass
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Dormancy in pedigreed Phalaris seed can lead to unsatisfactory germination in seed testing. The objective was to determine the effectiveness of recommended germination methods in overcoming seed dormancy in annual canarygrass ( P. canariensis L.). In 2003, ‘CDC Maria’ was grown at two locations in Saskatchewan, Canada. At maturity, panicles were harvested and stored at –20°C. Four replications of 50 seeds were used in each experiment. Hulled and hand dehulled seed were (i) stored at 23°C for 0 to 16 wk before germinating at 23°C, (ii) germinated at 15 to 30°C (with and without light), (iii) allowed to imbibe water at 23°C for up to 96 h, (iv) treated with pricking, hydrogen peroxide (H 2 O 2 ), gibberellic acid (GA), ethephon (2‐chloroethylphosphonic acid), potassium nitrate (KNO 3 ), chilling, and heating before germinating at 23°C, and (v) treated with KNO 3 , heating, and chilling before germinating (with and without light) at 15°C, 15/25°C (16/8h), and 20/30°C (16/8h). Mean germination was tested to be significantly different ( P = 0.05) from 95% germination by t tests. The after‐ripening period required to overcome primary dormancy in hulled seed was 8 to 10 wk longer than in dehulled seed. Hulled seed developed deeper secondary dormancy compared with dehulled seed, particularly at 20 and 25°C, with neither displaying <95% germination at 15°C or >10% at 30°C. Dehulled seed imbibed sufficient water to initiate germination 2 d faster than hulled seed. Applications of H 2 O 2 and GA overcame dormancy in dehulled seed, while none of the treatments overcame hulled seed dormancy. Dehulled and hulled seed displayed unsatisfactory germination, regardless of treatment or light regime, when germinated under an alternating temperature regime of 20/30°C. We recommend (i) hand dehulling seed, (ii) treating hulled seed with 0.01 M KNO 3 , or (iii) treating hulled seed with heat (3 d at 30°C) before germinating at 15°C for 10 d in darkness on top of blotters to overcome seed dormancy rapidly and effectively in annual canarygrass.
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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 | 0.001 | 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 | 0.001 |
| 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 it