The Genomic Basis of Adaptive Response to Anthelmintic Treatment in Two Species of Parasitic Nematodes
Bibliographic record
Abstract
Despite rapid increases in next-generation sequencing studies, relatively little is known about how often species evolve convergently at the genotypic level, using the same loci to respond to a similar selection pressure (hereafter, genotypic convergence). Here we investigate similar adaptive responses in two species of parasitic nematodes, H. contortus and T. circumcincta, and test for possible genotypic convergence between species. After treating populations on farms across Western Canada with antiparasitic drugs, either fenbendazole or ivermectin, we use whole genome shotgun sequencing to identify loci putatively involved in drug resistance in each species and test for genotypic convergence. Despite both species facing similar environments and selection pressures and showing similar resistance statuses, we found no evidence for polygenic genotypic convergence for resistance. Although the response to selection was not strongly repeated between species, we did identify six candidate genes for resistance which were repeated between 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 | 0.000 |
| 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) | 0.001 | 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".