Figure 4

(a) PCA of the merged POPRES dataset and the gourd's genome data. For POPRES individuals, abbreviations and colors for each sample follow conventions of a previously published analysis²⁴ in which two letter codes represent population identifiers. The black dot represents the individual data from the gourd's genome. A total of 101,107 SNPs (>3× coverage) were included. (b) PCA of the merged POPRES and 30 randomly composite genomes generated from the known ancestry of Louis XVI at the great-great grandparents generation. For POPRES individuals, abbreviations and colors for each sample follow conventions of a previously published analysis²⁴ in which two letter codes represent population identifiers. Composite individuals are represented by uppercase C. A total of 196,526 SNPs were included.