Identification of Barley Breeding Lines Combining Preharvest Sprouting Resistance with “Canadian‐type” Malting Quality
Bibliographic record
Abstract
ABSTRACT Rapid onset of germination in Canadian malting barley (Hordeum vulgare L.) facilitates production of good quality malt but predisposes barley to preharvest sprouting (PHS). Dormancy can be bred into barley to avoid PHS but some dormancy genes negate the potential for the “Canadian‐type” malt quality associated with a rapid start to germination. The microsatellite marker, GMS001, identified lines with PHS resistance and “Canadian‐type” malt quality in a cross between an Australian cultivar, Baudin, with PHS resistance, and a Canadian malt barley breeding line, TR253, without PHS resistance. The resulting population was grown at three sites over 2 yr with select site/years malted and analyzed for quality. Rapid visco analysis indicated PHS in some barley lines with as little as 11 mm of rain near harvest. The rapid visco analysis results substantiated the importance of the marker on chromosome 5H as breeding lines with the Baudin allele were less susceptible to sprouting, although they exhibited variable malt quality. Lines with the TR253 allele were PHS susceptible but had better and more consistent malt quality. Among the lines with the Baudin allele, five with PHS resistance and consistently good malt quality were identified. Among the lines with the TR253 allele, one showed good PHS resistance and the desirable “Canadian‐type” malt quality. These lines could serve as potential parents of future genotypes combining PHS resistance with good “Canadian‐type” malting potential.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".