Human Biology Open Access Pre-Prints

Document Type

Open Access Preprint

Anticipated Volume

91

Anticipated Issue

1

Abstract

In northeast Argentina, different Amerindian communities share territory and history with settlers, mainly Europeans. Due to miscegenation, the current Argentinian population has a particular structure that can be de- scribed through the X chromosome variation. Our objectives are: to describe the variation of 10 X-STRs in urban populations of the Argentinian regions known as Gran Chaco and Mesopotamia; to report the forensic parameters of these STRs, and to estimate the European and indigenous genetic components in these regions. Population and forensic parameters were estimated for 419 individuals from the analysed populations, including two indigenous groups, Wichí and Mocoví, previously reported. Population structure was estimated through Fst and Rst distances and AMOVA calculations. The indigenous American and European components were assessed with STRUCTURE. X- STRs showed a high level of genetic variability in urban and indigenous populations. Indigenous people of the Gran Chaco region showed significant differentiation from the urban samples (Fst 5.5%) and also among themselves (Fst 5.3%). The genetic differentiation among urban groups is almost negligible instead population from Misión Nueva Pompeya differed from the rest of the city populations. Forensic parameters indicate that these X-STRs are useful as a complement to paternity tests. The set of 10 STRs could be a good tool for population differences.

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