Genetic Characterization and Molecular Mapping <i>Pse‐2</i> Gene for Resistance to Halo Blight in Common Bean
Bibliographic record
Abstract
ABSTRACT Pseudomonas syringae pv. phaseolicola (Burkholder) Young et al. ( Psp ) causes halo blight, which is a serious bacterial disease of common bean ( Phaseolus vulgaris L.). Several resistance (R) genes have been discovered in host differential cultivar ZAA 12. Our objectives were to further characterize and enable marker‐assisted selection (MAS) of the Pse‐2 gene in ZAA 12 purported to have broad effect against multiple Psp races. A recombinant inbred population, ZAA 12 × ‘Canadian Wonder’, was challenged by the halo blight pathogen differential set consisting of nine Psp races. The resistance conferred by Pse‐2 to races 2, 3, 4, 5, 7, 8, and 9 expanded the effect known for this gene from three to seven races. Segregation in F 2 populations confirmed dominant inheritance for Pse‐2 against all races except Race 8. Resistance to Race 8 was recessively inherited and most closely fit a 7 resistant to 9 susceptible segregation ratio in the F 2 generation. Perhaps other genes are segregating that modify the effect of Pse‐2 against Race 8. A sequence characterized amplified region (SCAR) marker tightly linked with Pse‐2 was generated. The marker was used to integrate Pse‐2 to chromosome 10. A survey of lines and cultivars revealed the SCAR will have broad utility for MAS of Pse‐2 .
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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".