<i>Brassica</i>B-genome resistance to stem rot (<i>Sclerotinia sclerotiorum</i>) in a doubled haploid population of<i>Brassica napus</i>×<i>Brassica carinata</i>
Bibliographic record
Abstract
Abstract Stem rot (caused by Sclerotinia sclerotiorum) is an important fungal disease of canola (Brassica napus), causing significant yield losses worldwide. Sources of genetic resistance to this disease in B. napus are scarce; however, Brassica species carrying the B-genome have been reported to possess high levels of resistance to stem rot. In order to transfer resistance from B. carinata to B. napus, an interspecific cross of B. napus × B. carinata was carried out and a doubled-haploid (DH) population was developed from BC2S3 plants. Fifty-eight DH lines, of which two carried B-genome linkage groups, and nine accessions of the diploid and amphidiploid Brassica species were screened in a growth chamber for resistance to stem rot. The B. napus parent (‘Westar’) and all B. rapa and B. oleracea reference lines were susceptible to sclerotinia stem rot, while the B. carinata parent as well as the B. nigra and B. juncea reference lines were resistant to this disease. Significant variation for the response to sclerotinia stem rot was found in the DH lines. The two DH lines carrying B-genome chromosomes showed significant (P < 0.01) resistance compared to the species without B-genome chromosomes. However, some of the DH lines, in which no B-genome introgression was apparent, also showed good resistance to this disease. Broad-sense heritability was estimated to be H = 54% for S. sclerotiorum-induced lesion length in this population.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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".