Arame
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...Y-chromosomal haplogroup G1 is a minor component of the overall gene pool of South-West and Central Asia but reaches up to 80% frequency in some populations scattered within this area. We identified five branches, all with high geographical specificity: G1-L1323 in Kazakhs, the closely related G1-GG1 in Mongols, G1-GG265 in Armenians and its distant brother clade G1-GG162 in Bashkirs, and G1-GG362 in West Indians. The haplotype diversity, which decreased from West Iran to Central Asia, allows us to hypothesize that this rare haplogroup could have been carried by the expansion of Iranic speakers northwards to the Eurasian steppe and via founder effects became a predominant genetic component of some populations, including the Argyn tribe of the Kazakhs.
The trees reveal three principal clusters: Kazakh, Armenian and Bashkir, with 100% specificity of the cluster members to the corresponding populations. The Armenian and Bashkir clusters have a shared ancestor on the tree
...The genetic dates suggest that all principal branches already existed when this migration started. Indeed, even the last split into the Bashkir and Armenian clusters is dated back to 8000 YBP (S5 Table), while the Armenian linguistic branch separated around 4600 YBP and Indo-Iranian languages separated around 4200 YBP
When Turkic languages replaced Iranic ones in the steppes (perhaps starting from the middle of the 1st millennium AD) the G1-carriers were probably assimilated into expanding Turkic and then Mongolian-speaking populations.
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0122968
Well the Iranian spreading is probable, but an earlier spreading before IE is also possible.
What takes my attention here. Bashkirs are high in R1b-Z2105. Armenians are high in R1b Z2103 The splite between Armenian and Bashkir G1 is 8000 BP just in those times when R1b was moving north in Caspian region.
So i assume that this G1 goes from North-West of Iran with R1b to steppes and Volga bassin.
Later movements to the east are also possible during Scythian and Persian periods .