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  • Bergseth, Erik F.Oslo Univ Hosp, Norway (author)

Extended population genetic analysis of 12 X-STRs - Exemplified using a Norwegian population sample

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • Elsevier Ireland Ltd,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-187286
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-187286URI
  • https://doi.org/10.1016/j.fsigen.2022.102745DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The use of X-chromosomal markers to resolve questions of relatedness has experienced a significant increase during the last years in forensic genetics. Perhaps primarily due to the emergence of commercial kits, but equally important due to an increased awareness of the utility of those markers. The X-chromosomal inheritance pattern entails that some cases, for instance paternal half-sisters, can potentially be resolved using a few X-chromosomal markers alone. For the statistical assessment in kinship cases it is of importance to have relevant population frequency data. In the present study 631 unrelated males from a Norwegian population sample are analyzed. The resulting haplotypes are compared to previously studied population samples and a deeper analysis of the linkage disequilibrium (LD) structure is conducted. We demonstrate that the power to detect LD will be low when few males, say below 300, are analyzed. We use entropy to describe the degree of LD between multiallelic loci and describe how this measure varies between different studied populations. Large population frequency databases have been recommended when using X-chromosomal markers, and we show that by combining reference da-tabases from genetically similar populations, more precise haplotype frequency estimates can be obtained for rare haplotypes which improves the statistical assessment of the weight of evidence. In addition, we promote the use of simulations to assess the utility of STR markers in contrast to standard forensic parameters. Specifically we perform extensive simulations on cases where X-chromosomal markers are important and illustrate how the results can be used to infer the information gained from these markers.

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  • Tillmar, AndreasLinköpings universitet,Avdelningen för molekylär medicin och virologi,Medicinska fakulteten,Natl Board Forens Med, Dept Forens Genet & Forens Toxicol, Linkoping, Sweden(Swepub:liu)andka62 (author)
  • Haddeland, Jorgen T.Oslo Univ Hosp, Norway (author)
  • Kling, DanielOslo Univ Hosp, Norway; Natl Board Forens Med, Dept Forens Genet & Forens Toxicol, Linkoping, Sweden (author)
  • Oslo Univ Hosp, NorwayAvdelningen för molekylär medicin och virologi (creator_code:org_t)

Related titles

  • In:Forensic Science International: Elsevier Ireland Ltd601872-49731878-0326

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Bergseth, Erik F ...
Tillmar, Andreas
Haddeland, Jorge ...
Kling, Daniel
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NATURAL SCIENCES
NATURAL SCIENCES
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and Genetics
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Forensic Science ...
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Linköping University

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