Genetics of Resistance to Stagonospora Nodorum Blotch of Hexaploid Wheat
Bibliographic record
Abstract
The genetic control of resistance to Stagonospora nodorum blotch (SNB), caused by Stagonospora nodorum (Berk.) E. Castell. and E.G. Germano, an important foliar and head disease of wheat ( Triticum aestivum L.) in many parts of the world, was investigated in five hexaploid winter wheat and one hexaploid spring wheat genotypes. F 1 plant reaction and segregation data for resistance to a single Saskatchewan isolate of S. nodorum from various combinations of F 2 , random inbred line and doubled haploid (DH) populations of each resistant × susceptible cross indicated that single recessive genes controlled resistance in winter wheat genotypes ‘Red Chief’, ‘Hadden’, ‘Missouri Queen’, ‘Coker 76‐35’ and 81IWWMN 2095, and in spring wheat line 86ISMN 2137. All disease tests were performed on plants at the three‐leaf stage under controlled environmental conditions. Tests of F 1 , F 2 , F 2:3 , and DH populations from resistant × resistant crosses indicated that these six genotypes carried the same gene. The chromosomal location of this gene was determined by cytogenetic analysis with ‘Chinese Spring’ monosomic and ditelosomic lines. Tests of F 1 and F 2 plants from crosses between Red Chief and Chinese Spring monosomic and ditelosomic lines indicated that the gene shared by these hexaploid wheat genotypes is located on the long arm of chromosome 3A.
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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 | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".