Characterization of an alien source of resistance to Fusarium head blight transferred to Chinese Spring wheat<sup>1</sup>ECORC contribution #10-151.
Bibliographic record
Abstract
Very few sources of resistance to Fusarium head blight (FHB) of wheat have been identified. Thinopyrum elongatum (Host) D.R. Dewey (2n = 14, EE genome), a wild relative of wheat, carries resistance to FHB on the long arm of its chromosome 7E (7EL). In this report, a strain of Fusarium graminearum Schwabe, the principal causal agent of FHB, transformed to produce green fluorescent protein (GFP), was used to characterize the resistance carried by 7EL when expressed in the susceptible background of 'Chinese Spring' (CS) wheat. Inoculated spikelets of the addition line CS-7EL showed less infection than those of the parental line, CS. This was associated in CS-7EL with upregulation of many genes predicted to be involved in plant defence and downregulation of genes associated with salicylic-acid-induced defence. The difference between CS and CS-7EL in the progression of infection was striking; the fungus spread easily and extensively from the inoculated spikelet into the node and adjacent spikelets in CS, but was effectively blocked from spreading in CS-7EL. Microscopic data showed that fungal growth was inhibited within the inoculated spikelet in CS-7EL, and spread was completely blocked by the node tissue. The blocking of fungal growth through the node into the rachis correlates with the deposition of an unidentified substance in CS-7EL. Additionally, longer internode segments in CS-7EL versus CS may contribute to limiting fungal spread. Our results suggest that the resistance displayed by CS-7EL is multifaceted, involving both physical and chemical factors.
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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 | 0.000 |
| 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".