Tracing the Phylogeny of the Hexaploid Oat <i>Avena sativa</i> with Satellite DNAs
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Bibliographic record
Abstract
The genus Avena contains 30 different species from diploid through tetraploid to hexaploid with different genome compositions. Research regarding the origin of the different genomes in the polyploid species has been inconclusive. The objectives of this research were to investigate the phylogenetic relationships of the Avena species by means of polymorphisms in satellite, minisatellite, and microsatellite DNA. A satellite DNA sequence, ASS49, was isolated from a microsatellite‐enriched library of the hexaploid oat Avena sativa L. Southern hybridization showed that ASS49 was a species‐specific rather than a genome‐specific satellite. ASS49 was able to distinguish species that may be the diploid and tetraploid progenitors of hexaploid oat. The phylogenetic relationship of Avena species was further investigated using 40 microsatellite and four minisatellite primers. These results appeared to support the findings with ASS49. It appears that the Ac‐genome diploid species ( A. canariensis Baum Raj. et Samp.) is the progenitor and A‐genome donor of the hexaploid oat rather than the generally believed As‐genome species ( A. strigosa Schreber). Instead, A. strigosa appears to be a member of a separate lineage of diploid and tetraploid species including the tetraploid species A. abyssinica Hochst.
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it