Saturday, October 28, 2017
Global distributions of lactase persistence alleles (Liebert et al. 2017)
The series of maps below is from a new paper by Liebert et al. at Human Genetics. Almost certainly, any population with a sizable level of the 13910*T allele has relatively recent (post-Mesolithic) ancestry from Europe. In this context, note the presence of 13910*T in South Asia and North Central Africa. Populations in these regions also show high frequencies of two Y-chromosome haplogroups that are present in samples from Mesolithic Eastern Europe: R1a and R1b-V88, respectively. It's hard to imagine that this is a coincidence. World-wide distributions of lactase persistence alleles and the complex effects of recombination and selection, Hum Genet (2017). https://doi.org/10.1007/s00439-017-1847-y See also... Ancient herders from the Pontic-Caspian steppe crashed into India: no ifs or buts R1b-V88: out of the Balkans and into Africa?