Molecular evolution and origin of tetraploid <i>Elymus</i> species
Bibliographic record
Abstract
It is well known that Elymus arose through hybridization between representatives of different genera and several different polyhaplomic genomes have been described. Cytogenetically, five basic genomes (St, H, Y, P and W) in different combinations have been found in the genus. The vast majority of species are tetraploids and they are characterized by having the StY genome or the StH genome. It is not known where the Y genome originated, although it is a common in Elymus from Central and East Asia. It has been hypothesized from isozymic and cytological studies of Elymus species that the Old and New World taxa may be of separate origin of the H genome in the StH genome species. Data from single copy of nuclear gene RPB2 indicated that the Eurasian and American StH genome species have independent alloploid origins with different H-genome donors. This hypothesis is needed to be tested by using more molecular data. Sequences from single copy of nuclear genes (RPB2, β-amylase gene and EF-G) indicated that StY genome species is allopolyploid origin. This paper presents a briefly review on current status of molecular evolution and origin of tetraploid Elymus species.
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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 | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".