Here is the map of mt-haplogroup W, a lineage with strongly connected to Balto-Slavic people. The maximum frequencies of W are observed in Finland (9.6%), Hungary (5.2%), Latvia (4.1%), Macedonia (4%) and Belarus (3.7%, but over 5% if we exclude the south). The Finns and the Hungarians are both speakers of an Uralic language, which would imply an Uralic connection with haplogroup W. However other Uralic people have much less and often no W at all. For example the Saami have only 1% and the Udmurts 0%.
Regional hotspots in Catalonia, Brittany-Normandy and Ireland mirror those in the same regions for U5 and V, which are also typical of Finland and Karelia. It's hard to see how all these regions could be connected historically, unless all of them share a common Mesolithic ancestry.
Haplogroup W is also well represented among some ethnicities of the North Caucasus, such as the Karachay-Balkars (8.1%), Avars (8.1%), Adyghe-Kabardin (5.2%), three peoples who also share nearly 5% of haplogroup X.
Outside Europe, haplogroup W is also found at high frequencies among the Tajiks (6.2%), around 1.5% among the Uzbeks, Turkmens and Kazakhs, and at trace frequencies (< 0.5%) among many North Asian ethnic groups (Tuva, Yakuts, Buryats, Mongolians, Koreans, Japanese). The most likely explanation is that W was a minor lineage of the Indo-Europeans. A founder effect in the female Indo-European population could explain their oddly elevated frequency of W.
I did not notice any particular pattern in the distribution of subclades (all found throughout Europe), except for W6, which appears to be the main subclade found in the Near East and the Caucasus (in addition to Central Europe).
UPDATE: a detailed page about the origins, history, distribution and subclades of haplogroup W is now available here.
Regional hotspots in Catalonia, Brittany-Normandy and Ireland mirror those in the same regions for U5 and V, which are also typical of Finland and Karelia. It's hard to see how all these regions could be connected historically, unless all of them share a common Mesolithic ancestry.
Haplogroup W is also well represented among some ethnicities of the North Caucasus, such as the Karachay-Balkars (8.1%), Avars (8.1%), Adyghe-Kabardin (5.2%), three peoples who also share nearly 5% of haplogroup X.
Outside Europe, haplogroup W is also found at high frequencies among the Tajiks (6.2%), around 1.5% among the Uzbeks, Turkmens and Kazakhs, and at trace frequencies (< 0.5%) among many North Asian ethnic groups (Tuva, Yakuts, Buryats, Mongolians, Koreans, Japanese). The most likely explanation is that W was a minor lineage of the Indo-Europeans. A founder effect in the female Indo-European population could explain their oddly elevated frequency of W.
I did not notice any particular pattern in the distribution of subclades (all found throughout Europe), except for W6, which appears to be the main subclade found in the Near East and the Caucasus (in addition to Central Europe).
UPDATE: a detailed page about the origins, history, distribution and subclades of haplogroup W is now available here.
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