Registration of Spring Wheat Sources of Leaf Rust Resistance Genes <i>Lr53</i>, <i>Lr56</i>, <i>Lr59</i>, and <i>Lr62</i>
Bibliographic record
Abstract
Spring wheat (Triticum aestivum L.) germplasm with the alien derived leaf rust (caused by Puccinia triticina Erikss.) resistance genes Lr53, Lr56, Lr59, and Lr62 has been developed over many years, initially at the University of Stellenbosch (South Africa), and then at the Cereal Research Centre (Agriculture and Agri‐food Canada), and North Dakota State University (USA). A Thatcher near‐isogenic line carrying Lr53, Thatcher‐Lr53 (Reg. No. GS‐185, PI 682091), was derived, while, following allosyndetic pairing induction, numerous recombinants of the translocations carrying Lr56, Lr59, and Lr62 have been produced and mapped. The shortest and potentially most useful recombinants were identified and named Lr56‐157 (Reg. No. GS‐186, PI 682092), Lr59‐151 (Reg. No. GS‐187, PI 682093) and Lr62‐129 (Reg. No. GS‐188, PI 682094). The four resistance genes may be homeo‐allelic since they have similar locations at the telomeric ends of either chromosome 6AS or 6BS, appear to give strong race‐specific resistance to a wide range of P. triticina races, occur in the proximity of the Xdupw217 simple sequence repeat marker locus, and, except for Lr59 (which is derived from a smaller primary introgression), were loosely associated with a stripe rust (caused by P. striiformis Westend. f. sp. tritici Erikss.) resistance locus in the original translocations. This study serves to confirm the potential effectiveness of the genes retained in the shortened translocations by testing with 11 representative, current US races of P. triticina.
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 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 | 0.001 |
| 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.002 |
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".