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In Argentina, wild pigs ( Sus scrofa ) are represented by wild boars and feral pigs. These populations inhabit a wide territory due to natural dispersion and human translocation. Previous studies in other countries have detected crossbreeding between the different morphotypes, even with domestic pigs. This crossing can lead to introgression of improved traits in the wild population, which would increase the invasive potential and, therefore, the damage to native ecosystems. The aim of this work was to obtain the patterns of genetic variability throughout its current distribution in Argentina, in order to elucidate genetic relationships between wild boar and feral pig populations through the molecular marker control region. For this purpose, studies of genetic variability and population structure were carried out using 377 sequences from Argentinian wild pigs. The high values of haplotype and nucleotide diversity ( Hd  = 0.866 and  π  = 0.00959) obtained, and the cluster analyses (SAMOVA and BAPS) could indicate mixing between wild pigs and/or with domestic pigs. The star-like shapes observed in the haplotype network and neutral tests (Fu’s Fs and Tajima’s D) are consistent with a recent population expansion, supporting previous reports that indicate crossbreeding increases invasive potential.

Patterns of genetic variation on wild pig ( Sus scrofa ) populations over a complete range of the species in Argentina