Oleg Balanovsky et al
Mol Biol Evol (2011) doi: 10.1093/molbev/msr126
J1 is the major haplogroup in the Caucasus with the most complex and diverse phylogenetic network in the region. Of all the major Caucasian haplogroups (G2a3b1, G2a1a, J2a4b), J1 (xP58) is also the most frequent haplogroup present around the Caspian Sea and the most frequent in Northern Iran. Other J1 (xP58) SNP like J1b M365 is a Northern Iranian haplogroup forming a distinct cluster with the Western European, Western Iberian Portuguese-Brazilian J1b haplotypes, what possibly can be a genetic testimony of a section of the Iranian-speaking Alan presence in Lusitania and Northwestern Iberia, well attested in historical documents and plausible in terms of their TMRCA in the Atlantic and the Caspian shores.
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