ANI- ASI Admixture Dating . Here's the abstract: Estimating a date of mixture of ancestral South Asian populations. Linguistic and genetic studies have demonstrated that almost all groups in South Asia today descend from a mixture of two highly divergent populations: Ancestral North Indians (ANI) related to Central Asians, Middle Easterners and Europeans, and Ancestral South Indians (ASI) not related to any populations outside the Indian subcontinent. ANI and ASI have been estimated to have diverged from a common ancestor as much as 6.
ANI- ASI mixture is unknown. Here we analyze data from about 6. South Asian groups to estimate that major ANI- ASI mixture occurred 1,2. Some mixture may also be older- -beyond the time we can query using admixture linkage disequilibrium- -since it is universal throughout the subcontinent: present in every group speaking Indo- European or Dravidian languages, in all caste levels, and in primitive tribes. After the ANI- ASI mixture that occurred within the last four thousand years, a cultural shift led to widespread endogamy, decreasing the rate of additional mixture.
I bolded the portion which seems new compared to the previous abstract.
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