Test Your Hypothesis

 BGPT Odds of True

The hypothesis asserts lineage-B sites align with 19th-century nursery routes better than geographic distance. Human-mediated dispersal in French R. gallica is supported (28/98 sites), but no lineage-B identification or trade-route comparison exists in the evidence, so the specific claim is untested; moderate-low likelihood assigned conservatively.

 Hypothesis Novelty

Linking clonal population genetics of a wild rose to digitized historical nursery trade routes is an original, specific landscape-phylogeographic approach not present in the source study.

 Quick Analysis Plan Copied

 Long Analysis Plan

What the evidence supports — and what it cannot

The range-wide SSRseq study (1,618 samples; 519 R. gallica individuals; 29 loci) provides the foundation: 36 of 219 wild sites shared clonal lineages with cultivated/botanical or different-site wild individuals, and 28 of 98 French sites showed wild–cultivated clonal sharing, which the authors interpret as recent human-mediated dispersal concentrated in France Rosa gallica range-wide genotyping study.

However, the specific hypothesis is not answered by this study. No clonal lineage labeled "B" is defined in the evidence records, and the analysis did not compare site congruence with 19th-century nursery trade routes versus simple geographic distance. The authors explicitly note the direction of transfer (wild→cultivation vs cultivation→wild) cannot be determined per site, and the western France founder-effect signal is ambiguous: natural long-distance founding of a few individuals would produce the same low private allelic richness, so the human-mediated explanation "cannot be prioritized over natural dispersal based on these results" Author caveats on dispersal direction and founder effects.

Battle-testing the hypothesis

• Supports: wild–cultivated clonal identity is strong, direct evidence of recent human movement of genotypes, predominantly in France.
• Weakens/limits: no trade-route data were analyzed; no formal model comparison (e.g., ABC) between human-mediated and natural colonization scenarios; Iberia and the Middle East were unsampled, leaving alternative refugia untested; null alleles may inflate differentiation estimates, complicating spatial-genetic inference.
• Missing information to decide: georeferenced lineage-B site coordinates, digitized 19th-century nursery catalogs/routes (e.g., around Angers/Orléans), and a statistical test (e.g., Mantel/partial Mantel comparing clonal-sharing probability vs route connectivity vs Euclidean distance).

Verdict: biologically plausible and consistent with the study's French human-dispersal signal, but currently untested — the trade-route-vs-distance comparison has not been performed. Confidence in the general human-dispersal component is moderate; confidence in the lineage-B/nursery-route component is low due to absent data. Finding lineage-B sites clustered along historical nursery shipping corridors, independent of distance, would support the hypothesis; random scatter with respect to routes would refute it.