Novel insights on demographic history of tribal and caste groups from West Maharashtra (India) using genome-wide data.

Abstract:

:The South Asian subcontinent is characterized by a complex history of human migrations and population interactions. In this study, we used genome-wide data to provide novel insights on the demographic history and population relationships of six Indo-European populations from the Indian State of West Maharashtra. The samples correspond to two castes (Deshastha Brahmins and Kunbi Marathas) and four tribal groups (Kokana, Warli, Bhil and Pawara). We show that tribal groups have had much smaller effective population sizes than castes, and that genetic drift has had a higher impact in tribal populations. We also show clear affinities between the Bhil and Pawara tribes, and to a lesser extent, between the Warli and Kokana tribes. Our comparisons with available modern and ancient DNA datasets from South Asia indicate that the Brahmin caste has higher Ancient Iranian and Steppe pastoralist contributions than the Kunbi Marathas caste. Additionally, in contrast to the two castes, tribal groups have very high Ancient Ancestral South Indian (AASI) contributions. Indo-European tribal groups tend to have higher Steppe contributions than Dravidian tribal groups, providing further support for the hypothesis that Steppe pastoralists were the source of Indo-European languages in South Asia, as well as Europe.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Debortoli G,Abbatangelo C,Ceballos F,Fortes-Lima C,Norton HL,Ozarkar S,Parra EJ,Jonnalagadda M

doi

10.1038/s41598-020-66953-3

subject

Has Abstract

pub_date

2020-06-22 00:00:00

pages

10075

issue

1

issn

2045-2322

pii

10.1038/s41598-020-66953-3

journal_volume

10

pub_type

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