RFLP analysis of Hordeum species relationships1
Bibliographic record
Abstract
Detailed ribosomal DNA restriction maps were prepared for eight representative plants from Hordeum L. Section Hordeum (two H. bulbosum, H. glaucum, a diploid H. leporinum, a tetraploid H. leporinum, H. murinum, H. spontaneum, H. vulgare) in order to explore species relationships. The four restriction enzymes (EcoRI,SacI, BamHI and HindIII) used in our earlier study were supplemented with six additional ones (BglI, ClaI, KpnI, Pvu II, Sst II and XhoI). Southern blots prepared, using the restriction enzymes singly and in combinations, were probed with the wheat ribosomal probe pTA7l, and hybridization patterns analyzed. A comparison of the derived maps with known maps for wheat, pea and pumpkin showed strong conservation of restriction sites, especially in the ribosomal coding region. The maps suggest that duplication of coding region DNA and its insertion into the spacer region as well as amplification of subrepeats are responsible for variation in rDNA repeat length. Phylogenetic analysis indicated the early divergence of ancestral wheat and Hordeum species, followed by the divergence of the progenitors of H. spontaneum/H. vulgare and the remaining Hordeum species and, most recently, between those of H. glaucum and H. murinum.
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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) | 0.003 | 0.001 |
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".