Map callability before geography
For the *Suillus luteus* population study, build a geography-conditioned callability map for structural variants under linear and graph representations. Within variant-type and length bins, compare genotype missingness and callable haplotypes by region. Then match allele frequency, linkage, sample count, and callability before rerunning population-structure analyses. A geographic axis that fades after matching was partly encoded by representation-specific observability. Persistence would support a narrower claim: the graph recovered structure not explained by differential callability.
