The global human diversity map that I included in my previous post came without any reference to source or scientific backing, so it isn't reliable. I decided to search for something better and came across the three maps shown below.
They come from Figure 2, in the 2009 paper by Romero, I., Manica, A., Goudet, J. et al. How accurate is the current picture of human genetic variation?. Heredity 102, 120–126 (2009). https://doi.org/10.1038/hdy.2008.89
The map does not include data for Australia, South America appears with the lowest diversity for all three indicators, SNPs, indels, and SNPs, however, Africa has a low scoer in indels as you can see in (b).
I also found the source of the original map, it was published by Luca Pagani, as his thesis (online here, Through the layers of the Ethiopian genome: a survey of human genetic variation based on genome-wide genotyping and re-sequencing data. July 2013, DOI:10.17863/CAM.13969, Thesis for: PhDAdvisor: Toomas Kivisild). The map (shown again, below) is captioned "Pattern of genetic diversity in worldwide human populations. The distribution of STR diversity in worldwide human populations, adapted from the literature (Colonna et al. 2011), shows a higher diversity in African populations and a decline with the distance from Africa (each black dot represents a sampled population). The observed pattern fits with the proposed single African origin with subsequent migrations out of Africa proposed by Stringer and Andrews in 1988."
Colonna et al, (2011), cited by Pagani has several maps in his paper as Fig. 1 (Colonna, V., Pagani, L., Xue, Y. et al. A world in a grain of sand: human history from genetic data. Genome Biol 12, 234 (2011). https://doi.org/10.1186/gb-2011-12-11-234), where Pagani was a co-author.
I wonder what the plesiosaur in the Pacific stands for (?) it appears in the four maps of the 2011 paper.
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