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Comparison of the genetic background of different Colombian populations using the SNPforID 52plex identification panel

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Abstract

Various strategies for analysing SNP markers and genotyping have been published with the goal of obtaining informative profiles from biological samples that contain only small amounts of template and/or degraded DNA. In this study, a multiplex assay of 52 autosomal single-nucleotide polymorphisms (SNPs) was used to analyse 438 individuals from urban populations from different regions of Colombia, as well as a sample of 50 Native American individuals of the Pastos ethnic group from Nariño. To determine if significant differences in these 52 SNPs exist between the distinct regions of Colombia, genetic distance and admixture analyses were performed based on the available data for 17 different Colombian population groups and for population groups from Africa, Europe and America. The results demonstrate significant differences between the populations from the Southwest Andean, Central-West Andean, Central-East Andean, Orinoquian and northern Colombian Pacific Coast regions. Most of the regions exhibited a European and Native American admixture. One exception is the population from the region of Chocó (on the northern Pacific Coast), which exhibits a high proportion of African admixture (54 %). From the observed genetic backgrounds, it is possible to conclude that a single reference database for the entire country would not be suitable for forensic purposes. The allele frequencies and the forensically relevant parameters were calculated for all of the markers in each Colombian region with significant values for the combined matching probability (power of discrimination ≥0.99999999999999990) and the combined probability of exclusion (≥0.9990) in trios that were obtained from all of the population groups.

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Acknowledgments

The authors wish to thank Oscar Palacio, Tomas Restrepo, Yeny Posada, Silvana Zapata, Zoraida Florez, Gloria Galeano, Luz Mariela Ochoa and Liliana Porras for their help in sample typing and data revising and analysis. Likewise, the authors would like to thank the Ipiales’ residents, Cuaspud-Carlosama rural community and especially Dr. Martha Castañeda for her support in field sampling logistics. This work was supported by funding from Xunta de Galicia INCITE 09 208163PR (PI: Victoria Lareu). IPATIMUP is an Associate Laboratory of the Portuguese Ministry of Education and Science and is partially supported by FCT. LG is supported by a grant from CAPES, Brazil. AFA was supported by a María Barbeito grant from Xunta de Galicia (Spain). MF is funded by a grant from the postdoctoral programme of the Foundation Barrié de La Maza.

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Correspondence to Leonor Gusmão.

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Ibarra, A., Freire-Aradas, A., Martínez, M. et al. Comparison of the genetic background of different Colombian populations using the SNPforID 52plex identification panel. Int J Legal Med 128, 19–25 (2014). https://doi.org/10.1007/s00414-013-0858-z

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