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Failure to replicate sex bias in steppe migrations
See: Reich, Lazaridis
"Failure to Replicate a Genetic Signal for Sex Bias in the Steppe Migration into Central Europe"
The reference is to this paper:
Amy Goldberg et al
Familial migration of the Neolithic contrasts massive male migration during Bronze Age inEurope inferred from ancient X chromosomes
and discussed by us here:
This is how science is supposed to work. I guess those of us who doubted this whole huge harems idea had a point.
From the Reich, Lazaridis document:
"Goldberg et al.(1) used genome-wide ancient DNA data (2) from central European Bronze Age (BA)populations, and their three ancestral sources of steppe pastoralists (SP), Anatolian farmers (AF), andEuropean hunter-gatherers (HG), to investigate whether the SP migration into central Europe after5,000 years ago (3, 4) was sex biased. By estimating a lower proportion of SP ancestry on the Xchromosome(36.6%) which is primarily carried in females than on the autosomes (61.8%), theysuggested that the migration involved a ratio of 5-14 SP males for every female...
We attempted to replicate this finding using qpAdm (3), which leverages allele frequency correlationsbetween the admixed (BA) and source (SP, AF, HG) populations with distant outgroups to eliminatepotential biases due to genetic drift between the true source populations and the ones used assurrogates for them...
For the BA population, we estimate 61.4±2.9% SP, 31.0±1.2% AF,7.6±2.9% HG ancestry using all autosomal SNPs and 67.5±17% SP, 26.5±6.9% AF, 6.0±16.4% HGusing all X-chromosome SNPs; thus we do not find less SP ancestry on the X-chromosome.
I find it interesting they're using "SP", steppe people, perhaps, instead of Yamnaya or Indo-Europeans etc.
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