Higher-resolution K = 4 analysis of the European admixture in Chinchorro DNA

Below is a plot for a higher-resolution K = 4 admixture analysis that includes a Chinchorro mummy sample from Chile dated to 3972–3806 BC. This analysis uses a much larger number of transversion SNPs for all samples than my earlier admixture analyses. While most of my admixture analyses have used 1,067 transversion SNPs for the Chinchorro sample, and my previous high-resolution admixture analyses used 2,055 transversion SNPs for the sample, this analysis uses 26,982 transversion SNPs for the sample.

The plot shows that the additional Caucasoid admixture that the Pericú sample BC23 appeared to have in my earlier analyses is spurious.

Here are the new admixture percentages for the Chinchorro sample:

      0.00%
      38.61%
      0.00%
      61.39%

This analysis thus estimates that the Chinchorro sample has more additional Caucasoid admixture than the 29.15% estimate produced by my earlier high-resolution K = 4 analysis.

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