Genetic similarity between Portugal and the rest of Europe

desisto00:

Hierarchical Genetic Similarity of Portugal Compared to European and Mediterranean Populations (Uniparental Lineages)

Methodology for Calculating Y-DNA (Y-chromosomal Adam) and mtDNA (Mitochondrial Eve) Similarity

The genetic similarity between Portugal (baseline: 100%) and the remaining populations was calculated using the Renkonen Similarity Index (percentage overlap), adapted via a 3-Level Hierarchical Phylogenetic Tree Model to avoid treating biologically close lineages as entirely distinct.

Level 1 — Terminal Subclades (50%): Directly compares all specific haplogroups and subclades listed in the table. Reflects more recent historical proximity. (In mtDNA, samples lacking internal resolution for H are compared at the total H level to prevent distortions).

Level 2 — Phylogenetic Families (35%): Groups sister lineages into the same family, capturing founder relationships. Y-DNA (R, I, J, E, G, LT, Q, N, Others); mtDNA (HV, JT, U+K, I, W, X, L, Others).

Level 3 — Ancestral Macro-Trunks (15%): Merges branches into deep prehistoric roots. Y-DNA (Macro-P: R+Q, Macro-IJ: I+J, Macro-K derivatives: LT+N, Trunk E, Trunk G, Others); mtDNA (Macro-R: HV+JT+U/K, Macro-N non-R: I+W+X, Macro-L, Others).

Final Similarity (Rounded to Integer) = (0,50 * Renkonen_L1) + (0,35 * Renkonen_L2) + (0,15 * Renkonen_L3)

Data Sources

Y-DNA and mtDNA haplogroup frequency data were retrieved from compilation tables on the Eupedia platform (Distribution of European Y-chromosome DNA haplogroups and Distribution of European mitochondrial DNA haplogroups). Eupedia tables aggregate findings from dozens of peer-reviewed genetic studies, population genetics publications, and reference databases (such as YHRD and EMPOP). Detailed academic references, primary study sources, and respective sample sizes are documented directly on the project's official website.

Collection: genetics - Tags: genetics, portugal - Source: reddit.com