OP367 - Evidence from Mitochondrial DNA Sequences Suggest a Recent Origin for Peromyscus truei comanche
Bibliographic record
Abstract
Isolated populations of Peromyscus truei comanche occur in the Tule and Palo Duro Canyon region of the Texas Panhandle.Four plausible routes that may explain the current distribution of the pion mouse were investigated herein by comparing the phylogenetic relationships of P. t. comanche with eight other subspecies of P. truei from throughout the western and southwestern United States and the Baja Peninsula of Mexico.To determine the origin and affiliation of P. t. comanche populations, DNA sequence data were obtained from the mitochondrial cytochrome-b gene (1,143 bp) and displacement loop (971 bp) and analyzed in a phylogenetic context.Results of the Bayesian inference analyses indicated that samples of P. t. comanche genetically were undifferentiated from two of the eight subspecies of P. truei (P.t. nevadensis and P. t. truei).Overall, genetic divergence values, obtained from the cytochrome-b gene, ranged from 1.16% to 4.99% between P. t. comanche and the other eight subspecies of P. truei.Peromyscus truei comanche differed genetically from the nearest population of P. t. truei (Glenrio, Texas) by 1.73%; however, samples of P. t. comanche were differentiated from individual populations of P. t. truei from Mills Canyon, New Mexico, Black Mesa, Oklahoma, and Guadalupe Mountains National Park, Texas by 0.79%, 1.00%, and 2.00%, respectively.Although results of the phylogenetic analyses were unable to definitively explain the origin of P. t. comanche, levels of genetic divergence suggest a recent evolutionary history with samples from Mills Canyon, New Mexico.Results from the divergence dating analyses suggest that P. t. comanche from the Texas Panhandle diverged from a source-stock population in northeastern New Mexico approximately 0.71 mya.This infers an expansion route (Route II) from Mills Canyon, New Mexico, along canyonlands associated with the Canadian River system to the northeastern edge of the Llano Estacado, and subsequent isolation and divergence of P. t. comanche from its P. t. truei-like ancestor; whereas the closest extant populations of P. t. truei in Glenrio, Texas genetically were more divergent (1.73%), and also would have required dispersal across the inhospitable landscape (for P. truei) of the Llano Estacado.Finally, P. t. comanche did not form a monophyletic group (to the exclusion of other samples of P. t. truei) in the genetic analyses, however the significant levels of morphological differentiation reported in other studies justifies its retention as a valid subspecies.
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How this classification was reachedexpand
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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 teacher head, 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".