Distinguishing the co-ancestries of haplogroup G Y-chromosomes in the population

[Centurion]

Distinguishing the co-ancestries of haplogroup G Y-chromosomes in the populations of Europe and the Caucasus // European Journal of Human Genetics , (16 May 2012) | doi:10.1038/ejhg.2012.86

Rootsi et al

Haplogroup G, together with J2 clades, has been associated with the spread of agriculture, especially in the European context. However, interpretations based on simple haplogroup frequency clines do not recognize underlying patterns of genetic diversification. Although progress has been recently made in resolving the haplogroup G phylogeny, a comprehensive survey of the geographic distribution patterns of the significant sub-clades of this haplogroup has not been conducted yet. Here we present the haplogroup frequency distribution and STR variation of 16 informative G sub-clades by evaluating 1472 haplogroup G chromosomes belonging to 98 populations ranging from Europe to Pakistan. Although no basal G-M201* chromosomes were detected in our data set, the homeland of this haplogroup has been estimated to be somewhere nearby eastern Anatolia, Armenia or western Iran, the only areas characterized by the co-presence of deep basal branches as well as the occurrence of high sub-haplogroup diversity. The P303 SNP defines the most frequent and widespread G sub-haplogroup. However, its sub-clades have more localized distribution with the U1-defined branch largely restricted to Near/Middle Eastern and the Caucasus, whereas L497 lineages essentially occur in Europe where they likely originated. In contrast, the only U1 representative in Europe is the G-M527 lineage whose distribution pattern is consistent with regions of Greek colonization. No clinal patterns were detected suggesting that the distributions are rather indicative of isolation by distance and demographic complexities.

http://www.nature.com/ejhg/journal/vaop/ncurrent/abs/ejhg201286a.html

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Population codes: Baltics (Blt), Belarusians (Blr), Poles (Pol), Ukrainians (Ukr), northern Russians (NRu), southern and central Russians (SRu), Circum-Uralic (CUr), Germans (Ger), Central Europeans (CE), Iberians (Ibr), French (Fra), Sardinians (Srd), Corsica (Cor), Sicilians (Sic), Italians (Ita), Switzerlands (Swi), Western Balkans (WB), Romanians (Rmn), Bulgarians (Bul), Crete (Crt), Greeks (Grc), Anatolian Greeks (AG), Egyptians (Egy), Near/Middle Easterners (ME), Ashkenazi Jews (AJ), Sephardic Jews (SJ), Arabian Peninsula (AP), Palestinians (Pal), Druze (Drz), Western Turks (WTu), Central Turks (CTu), Eastern Turks (ETu), Iranians (Irn), Abkhazians (Abh), Armenians (Arm), Georgians (Grg), South Ossetians (SOs), Iranian Azeris (Azr), Abazins (Aba), Adyghes (Ady), Balkars (Blk), Cherkessians (Crk), Kabardins (Kab), Karachays (Kar), Kuban Nogays (Nog), North Ossetians (NOs), Chamalals (Cha), Ingushes (Ing), Kumyks (Kum), Central Asians (CA), Pakistani (Pak).

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