An Excerpt from an article previously posted: Basically, it is a convoluted way of saying that Western Eurasians and Eastern Eurasians are derivative extremes of the Indian type.
An Indian Ancestry: a Key for Understanding Human Diversity in Europe and Beyond
The absence of haplogroup M in Europeans, compared to its equally high frequency among Indians, eastern Asians and in some Central Asian populations is inconsistent with the 'general Caucasoidness' of Indians. Any relationship between Indians and 'Caucasoids' must therefore be based on qualitative and quantitative data on genetic markers common to Europeans and Indians. Analyzing Indian maternal lineages further, we found that an extensive overlap was provided by haplogroup U. <b>The distribution of haplogroup U (Table 31.1) is a mirror image of that for haplogroup M:</b> the former has not been described so far among eastern Asians but is frequent in European populations as well as among Indians (Kivisild et al. 1999a). This reverse analogy goes further: Indian U lineages differ substantially from those observed in Europe and their coalescence to a common ancestor, like that for the haplogroup M lineages, datesback to about 50,000years (Kivisild et al. 1999b). <b>We infer from the fact that Indians and other populations do not generally share mtDNA lineages at the tips of the branches of the global phylogenetic tree with either eastern or western Eurasians that the Indian maternal gene pool has come largely through an autochtonous history since the Late Pleistocene.</b>
An Indian Ancestry: a Key for Understanding Human Diversity in Europe and Beyond
The absence of haplogroup M in Europeans, compared to its equally high frequency among Indians, eastern Asians and in some Central Asian populations is inconsistent with the 'general Caucasoidness' of Indians. Any relationship between Indians and 'Caucasoids' must therefore be based on qualitative and quantitative data on genetic markers common to Europeans and Indians. Analyzing Indian maternal lineages further, we found that an extensive overlap was provided by haplogroup U. <b>The distribution of haplogroup U (Table 31.1) is a mirror image of that for haplogroup M:</b> the former has not been described so far among eastern Asians but is frequent in European populations as well as among Indians (Kivisild et al. 1999a). This reverse analogy goes further: Indian U lineages differ substantially from those observed in Europe and their coalescence to a common ancestor, like that for the haplogroup M lineages, datesback to about 50,000years (Kivisild et al. 1999b). <b>We infer from the fact that Indians and other populations do not generally share mtDNA lineages at the tips of the branches of the global phylogenetic tree with either eastern or western Eurasians that the Indian maternal gene pool has come largely through an autochtonous history since the Late Pleistocene.</b>