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Gravetto-Danubian
01-23-2016, 06:57 AM
A new study in Nature (http://www.nature.com/articles/srep19157) on haplogroup J2 structure in India, and pre-historic inferences (open access).


The global distribution of J2-M172 sub-haplogroups has been associated with Neolithic demic diffusion. Two branches of J2-M172, J2a-M410 and J2b-M102 make a considerable part of Y chromosome gene pool of the Indian subcontinent. We investigated the Neolithic contribution of demic dispersal from West to Indian paternal lineages, which majorly consists of haplogroups of Late Pleistocene ancestry. To accomplish this, we have analysed 3023 Y-chromosomes from different ethnic populations, of which 355 belonged to J2-M172. Comparison of our data with worldwide data, including Y-STRs of 1157 individuals and haplogroup frequencies of 6966 individuals, suggested a complex scenario that cannot be explained by a single wave of agricultural expansion from Near East to South Asia. Contrary to the widely accepted elite dominance model, we found a substantial presence of J2a-M410 and J2b-M102 haplogroups in both caste and tribal populations of India. Unlike demic spread in Eurasia, our results advocate a unique, complex and ancient arrival of J2a-M410 and J2b-M102 haplogroups into Indian subcontinent.

paulgill
01-23-2016, 10:08 AM
A new study in Nature (http://www.nature.com/articles/srep19157) on haplogroup J2 structure in India, and pre-historic inferences (open access).

Why the title is not J2, there is J1 also, no?

RCO
01-23-2016, 04:48 PM
Yes, we can find some J1 as well
www.nature.com/article-assets/npg/srep/2016/160112/srep19157/extref/srep19157-s1.xls

J1-M267. The biggest proportions of J1 in the present article
Kashmiri Pandit - 8,7
Sonakar - 7,7

As always no refined J1 structure while J2 is full of subdivisions. Geneticists are always lazy or they have another agenda in relation to J1.

J Man
01-27-2016, 04:46 PM
I find it quite interesting that in this study 5 out of 38 or 13.16% of the Chenchu samples belong to Y-DNA haplogroup J2a. There also seems to be 3 Chenchu from this study that are members of haplogroup J2b and 1 that belongs to haplogroup J1. The Chenchu are classified as a ''Primitive Tribe'' in India are are traditionally hunter-gatherers.

https://en.wikipedia.org/wiki/Chenchu_people