Natural variation and functional analysis of TaSD6 genes regulating seed dormancy in common wheat
Bibliographic record
Abstract
The bHLH transcription factor SD6 regulates rice seed dormancy. However, sequence variants of wheat SD6 homologs and their roles in seed dormancy remain unknown. Here, we cloned three wheat homologous genes of SD6 (named TaSD6-7A , TaSD6-7B , and TaSD6-7D ), and found that TaSD6-7A had abundant sequence variations, while TaSD6-7B and TaSD6-7D had no variation. Based on sequence variations in the promoter and coding regions of TaSD6-7A , we developed three molecular markers and verified their associations with seed dormancy in 160 wheat varieties. We further confirmed that the TaSD6-7 A + 1307-T allele positively regulated seed dormancy, but had no adverse effects on other important agronomic traits. Resequencing and phenotypic data indicated that the favorable haplotype TaSD6-7A HapII associated with high dormancy level was more common in landraces than in modern varieties. Additionally, we demonstrated the pyramid effects of TaSD6-7A with known dormancy-related genes in enhancing seed dormancy. Overall, this study provides novel genetic resources and molecular markers for improving PHS resistance of modern wheat varieties.
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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 | 0.000 | 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".