Lineage sorting accounting for the disassociation between chloroplast and mitochondrial lineages in oaks of southern France
Bibliographic record
Abstract
Dumolin-Lapégue et al. (Mol. Biol. Evol. 15: 1321-1331. 1998) suggested that recurrent inversions of a 4-bp sequence of the mtDNA nad4-1/2 locus due to intramolecular recombination were responsible for the disassociation of chloroplast and mitochondrial genomes of French oaks. Based on their PCR-RFLP (PCR-restriction fragment length polymorphism) data obtained from three noncoding spacers, a minimum spanning network representing the phylogeny of the cpDNA was reconstructed. The mapping of alleles b and c of the mtDNA nad4-1/2 locus on the cpDNA network revealed a nonrandom distribution, which contradicted the expected patterns when repeated, and ongoing inversions had been occurring. The fact that polymorphisms (a mixed c + d type) were mostly restricted to the interior nodes of the network, which represented ancient haplotypes and geographically coincided with probable glacial refugia in southern Europe, agreed with a migrant-pool model. Evidence of a widespread pattern of polymorphism distribution indicated that mtDNA haplotypes were likely to be more ancient than the cpDNA haplotypes. Lineage sorting, due to relative age of cpDNA vs. mtDNA, plus the specific migratory mode, which recruited colonists from a random sample of resource populations during glacial expansion (thereby extending the lineage sorting period, LSP), may have resulted in the disassociation of chloroplast and mitochondrial genomes in oaks.
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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 | 0.001 | 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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 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".