Genetic Markers and Leaf Rust Resistance of the Wheat Gene <i>Lr32</i>
Bibliographic record
Abstract
Leaf rust (caused by Puccinia triticina Eriks.) is a worldwide and yield‐limiting disease of common wheat (Triticum aestivum L.). The gene Lr32, which confers seedling resistance to leaf rust, was previously transferred from Aegilops tauschii Coss. (RL5497‐1) to chromosome 3DS of common wheat. Without exception, Lr32 conferred resistance to 616 diverse isolates of leaf rust sampled from Canadian wheat fields over the past decade (2000 to 2009). Marker alleles specific to chromosome 3DS of RL5497 were found in Lr32 backcross lines of both Katepwa (BW196R) and Thatcher (RL6086). These introgressions from A. tauschii had no adverse effects on either agronomic performance or end use quality. A map based on 338 doubled haploid lines (DHL) from the cross of BW196R × Thatcher showed that Lr32 was slightly distal (0.6 cM) to two simple sequence repeat (SSR) loci wmc43 and barc135, which cosegregated on chromosome 3DS. A survey of the fragments amplified in wheats of diverse origin showed that both wmc43 and barc135 were cross‐applicable as markers for stacking Lr32 with other broadly effective leaf rust resistance genes.
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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 | 0.001 | 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) | 0.001 | 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".