The origins of<i>Erigeron trifidus</i>(Asteraceae), an agamospermous rare species in AlbertaThis paper is one of a selection of papers published in the Special Issue on Systematics Research.
Bibliographic record
Abstract
Erigeron trifidus Hook. (Asteraceae) is a rare species in Alberta thought to have originated via hybridization between Erigeron compositus Pursh and Erigeron lanatus Hook., and is disjunct in three alpine regions of Alberta. An analysis of uni- and bi-parentally inherited molecular markers from E. trifidus and its putative parents yielded data that support the hybridization hypothesis for some of the populations. In most cases, cpDNA haplotypes in E. trifidus were the same as in E. lanatus, suggesting that E. lanatus is the maternal parent. Sequencing and cloning the nuclear ETS region revealed multiple repeat types in most individuals. Erigeron trifidus contained only the repeat types also present in the putative parents. In addition, E. trifidus displayed the highest percentage of intra-individual repeat type polymorphism, consistent with a hybrid origin. All northern populations of E. trifidus exhibited a particular pattern of repeat type variation that was absent in central and southern populations. Since E. lanatus is absent from Ram Mountain (in central Alberta), it is likely that populations from this locality, previously identified as E. trifidus, are instead a different agamospermous variant of E. compositus. In southern Alberta (Waterton Lakes), populations of E. trifidus are thought to be the product of local hybridization, and are therefore of different origin from the northern populations. The identity of the putative parents in the southern region remains uncertain.
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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".