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Iran_N is the source population of both CHG and Iran_Chl. The difference is that CHG has extra EHG and WGH and Iran_Chl has extra Levantine farmer ancestry. Iranian and Levantine farmers are related because they are both about half Basal Eurasian.
The original Aryans had CHG and EEF ancestry but obtained it from different sources (the first through the Caucasian input into the Pontic-Caspian Steppe and the second in Central Europe) so there is no direct Iran_Chl in Aryans although the ancestral components are similar.
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