
qpAdm data preparation: from a raw DNA file to an AADR merge that works
The undocumented half of every qpAdm analysis: file formats, genome builds, strand hygiene, convertf and Poseidon, and the merge arithmetic that decides your standard errors before any model runs.
Related posts

Learn qpAdm: the complete guide, from zero to defensible models
A structured learning path through everything qpAdm — what to read in what order, from the f4-statistics underneath to running models in R, choosing outgroups, reading results and knowing the method's measured limits.
3 min read
qpAdm best practices: the current checklist, with the numbers behind every rule
The definitive working checklist for qpAdm in 2026 — temporal stratification, right-set construction, lowest-rank-first search, composite feasibility and reporting standards — each rule carrying its measured justification from the 2021–2025 audit literature.
4 min read
Classic ADMIXTOOLS vs ADMIXTOOLS 2: why your qpAdm numbers differ, and how to match them
Same model, different p-value: the real differences between original qpAdm and ADMIXTOOLS 2 — allsnps semantics, fudge_twice, f2 precomputation — and the settings that reproduce classic behaviour when you need to.
3 min read