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01-11-2008 | Original Article

The effect of number of loci on geographical structuring and forensic applicability of Y-STR data in Finland

Authors: Jukka U. Palo, Markus Pirttimaa, Auli Bengs, Vivian Johnsson, Ismo Ulmanen, Matti Lukka, Bjarne Udd, Antti Sajantila

Published in: International Journal of Legal Medicine | Issue 6/2008

Abstract

The Y-chromosomal diversity among Finnish males is characterized by low diversity and substantial geographical substructuring. In a 12-locus data set (PowerPlexY), espe-cially the eastern parts of the country showed low levels of variation, and the western, middle, and eastern parts of Finland differed from each other by their Y-short tandem repeat (STR) haplotype frequencies (Palo et al., Forensic Sci Int Genet 1:120–124, 2007). In this paper, we have analyzed geographical patterns of Y-STR diversity using both 12-locus (PowerPlexY) and 17-locus (Yfiler) data sets from the same set of geographically structured samples. In the larger data set, the haplotype diversity is significantly higher, as expected. The geographical distribution of haplotypes is similar in both data sets, but the level of interregional differences is significantly lower in the Yfiler data. The implications of these observations on the forensic casework are discussed.

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Title: The effect of number of loci on geographical structuring and forensic applicability of Y-STR data in Finland
Authors: Jukka U. Palo
Markus Pirttimaa
Auli Bengs
Vivian Johnsson
Ismo Ulmanen
Matti Lukka
Bjarne Udd
Antti Sajantila
Publication date: 01-11-2008
Publisher: Springer-Verlag
Published in: International Journal of Legal Medicine / Issue 6/2008
Print ISSN: 0937-9827
Electronic ISSN: 1437-1596
DOI: https://doi.org/10.1007/s00414-008-0250-6

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The effect of number of loci on geographical structuring and forensic applicability of Y-STR data in Finland

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