Is genetic drift what causes the Ma'anyan to plot so distantly from other SE-asians?

[shazou]

..on this PCA:

https://i.imgur.com/8Uv8uFM.jpg

[loxias]

Would be, what study is this by the way?

[StillWater]

It seems that N9a3 and A may also be responsible for some East Asian admixture in Ashkenazim: http://www.khazaria.com/genetics/aj-east-asian-admixture.html

Could a mixture of sources explain mine, given how high and geographically atypical it is? (wrong thread)

[shazou]

Would be, what study is this by the way?
https://www.researchgate.net/publication/303355340_Contrasting_Linguistic_and_Genetic_Origi ns_of_the_Asian_Source_Populations_of_Malagasy

in this paper they are trying to deduce whether it may be 'genetic drift' which causes the Ma'anyan to plot so distantly from other SE-Asians etc or if it is other factors as well