Long Juvenile Soybean Flowering Responses under Very Short Photoperiods
Bibliographic record
Abstract
Long juvenile (LJ) soybean [ Glycine max (L.) Merr.] lines exhibit delayed flowering under short photoperiods. Two loci, J and E6 , have been reported to control this response. The objectives of this work were to compare phenology of E6E6 and e6e6 isolines across a range of photoperiods, to determine the genetic control of the LJ trait during the introgression of e6 into an early maturity background, and to compare e6e6 and jj lines in short photoperiods. Flowering time of ‘Paraná’ ( E6E6 ) and its LJ isoline ‘Paranagoiana’ ( e6e6 ) was observed in photoperiods of 3 to 16 h. Both lines flowered late (about 100 d) in a 16 h photoperiod. Paraná flowered in less than 30 d in 6, 8, 10, and 12 h photoperiods. Paranagoiana responded to decreases in photoperiod from 12 to 4 h with earlier flowering, although always flowered a minimum of 5 d later than Paraná. The LJ trait in Paranagoiana was introgressed into OT94‐47 with selection for late flowering under 12 h photoperiods. From the initial cross to the third backcross, F 2 populations exhibited a 15:1 early:late flowering ratio in 12 h photoperiods. A similar 15:1 ratio was observed in a cross between OT94‐47 and LJ PI 159925. In comparisons, under 3 to 12 h photoperiods, Paranagoiana and PI 159925 flowered similarly and later than Paraná. It appears that the LJ lines may have a 5 d juvenile period but flowering delays greater than 5 d are likely due to photoperiod responses to very short photoperiods (≥5 h).
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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 | 0.001 |
| Science and technology studies | 0.001 | 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".