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Y Chromosome Microsatellite Genetic Variation in Two Native American Populations From Argentina: Population Stratification and Mutation Data

NCJ Number
Forensic Science International: Genetics Volume: 2 Issue: 4 Dated: September 2008 Pages: 274-280
Ulises Toscanini; Leonor Gusmao; Gabriela Berardi; Antonio Amorim; Angel Carracedo; Antonio Salas; Eduardo Raimondi
Date Published
September 2008
7 pages
This article reports on two Native-American populations from north and northwest regions of Argentina (Toba and Colla) that were analyzed for 17 Y chromosome short tandem repeat loci (Y-STRs), namely, DYS19, DYS3891, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS437, DYS438, DYS439, DYS448, DYS456, DYS458, DYS635, and GATA H4.1.
Significant population differences were observed between Colla and Toba, at least in part, due to a more prevalent European input in the Colla sample. In agreement with this observation is the fact that the genetic distances between Colla and Iberian populations are lower than those observed between Iberian and any other Native-American population. The results of multiscaling dimensional analysis and genetic distances (Rst) among Native-American population samples also reflect this fact. The data show the existence of population stratification in Argentina, a fact that should be taken into account in forensic casework. Over 357 allele transfers, 2 one-step mutations could be detected at DYS456 and GATA H4.1 loci. A new 16.1 “micro-variant” allele was observed for DYS385, characterized by an insertion at the fifth GAAA repeat. Researchers also observed two alleles at the DYS448 locus in three samples (two from Toba and one from Colla). A total of 34 and 16 different haplotypes were detected for Toba and Colla, respectively, the former with a haplotype diversity value of 0.9769 plus or minus 0.01 and 0.9497 plus or minus 0.02 for the latter. 3 tables, 3 figures, and 35 references