engleski

Origin and Diffusion of mtDNA Haplogroup X

A maximum parsimony tree of 21 complete mitochondrial DNA (mtDNA)sequences belonging to haplogroup Xis subdivided into two major branches, here defined as "X1" and "X2". The first is restricted to the populations of North and East, whereas X2 encompasses all X mtDNAs from Europe, western and Central Asia, Siberia, and the great majority of the Near East, as well as some North African samples. Subhaplogroup X1 diversity indicates an early coalescence time, whereas X2 has apparently undergone a more recent population expansion in Eurasia, most likely around or after the last glacial maximum. It is notable that lacks close relatives in the entire Old World, including Siberia. The position of X2 in the phylogenetic tree suggests an early split from the other X2 clades, likely at the very begining of their expansion and spread from the Near East.

Origin; mt DNA; Haplogroup X

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