Genetic structures of common ash (<i>Fraxinus excelsior</i>) populations in Germany at sites differing in water regimes
Bibliographic record
Abstract
The genetic structure of the alcohol dehydrogenase (ADH) enzyme complex was studied by means of isozyme analysis among several common ash ( Fraxinus excelsior L.) provenances. We analysed if specific alloforms of locus ADH-B are selected under flooding stress caused by oxygen deprivation, since ADH is a fundamental enzyme of the plant metabolism under anoxia. This selection, if given, could therefore result in different ash ecotypes. Furthermore, genetic structures in the same provenances resulting from the analysis of four nuclear microsatellite markers are also discussed and compared with those resulting from the isozyme analyses to differentiate between adaptation and demographical processes. We found the highest value of genetic diversity at one of the two examined floodplains but did not find significant correlations between genotypes structures and flooding. The observed allele distributions can be mainly attributed to high human pressure and important seed transport events. These are regarded as the main forces shaping the actual genotype distributions rather than selection processes acting on locus ADH-B.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| 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 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".