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Effects of Reference Population and Number of STR Markers on positive evidence in Paternity Testing | OMICS International | Abstract
ISSN: 2157-7145

Journal of Forensic Research
Open Access

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Research Article

Effects of Reference Population and Number of STR Markers on positive evidence in Paternity Testing

Rossana Moroni3,4*, Dario Gasbarra2, Elja Arjas1,2, Matti Lukka1 and Ismo Ulmanen1

1Forensic Genetic Paternity Testing Unit, National Institute for Health and Welfare, Helsinki, Finland

2Helsinki University, Department of Mathematics and Statistics, P.O. Box 68, FIN-00014, Finland

3National Bureau of Investigation Forensic Laboratory - Jokiniemenkuja 4, 01370 Vantaa, Finland

4Åbo Akademi - Department of Mathematics, Biskopsgatan 8 FIN-20500 Turku, Finland

*Corresponding Author:
Dr. Rossana Moroni
Paternity Testing Laboratory
National Public Health Institute
Helsinki University - Department of Mathematics and Statistics
P.O. Box 68, FIN-00014, Finland
E-mail: [email protected]

Received date: March 10, 2011; Accepted date: March 24, 2011; Published date: March 29, 2011

Citation: Moroni R, Gasbarra D, Arjas E, Lukka M, Ulmanen I (2011) Effects of Reference Population and Number of STR Markers on Positive Evidence in Paternity Testing. J Forensic Res 2:119. doi:10.4172/2157-7145.1000119

Copyright: © 2011 Moroni R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited


Three sets of commonly used autosomal short tandem repeat (STR) markers (containing 15, 10 and 9 markers) and 14 databases from populations belonging to Africa, America, Asia and Europe were used to investigate how the selection of the population database and the number of considered markers would influence the statistical evidence that is usually produced to favour paternity. The study was based on a sample of 100 randomly chosen Finnish paternity trios collected during paternity testing case work and without any exclusion after use of 15 STR markers. Paternity Index, Probability of Paternity, Typical Paternity Index and Probability of Exclusion were computed and descriptive statistics were provided separately for trios (mother, child and putative father) and duos (obtained from trios but not considering the genetic information of the mother). This was done for all combinations of markers and databases. In trio cases the differences between results obtained are not statistically significant. However, especially in duo cases the use of 15 STR markers is recommended.


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