| NCJ Number: |
254584  |
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| Title: |
Development of a Self-Sustaining, Open Access Forensic STR Sequence Diversity Database |
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| Document: |
PDF |
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| Author(s): |
Seth Faith; Kelly Meiklejohn |
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| Date Published: |
March 2020 |
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| Annotation: |
This is the Final Summary Overview for a project with the goal of characterizing STR alleles from a large U.S. cohort and developing an online database (the POPSeq Human STR Sequence Diversity Database). |
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| Abstract: |
Next-generation sequencing (NGS), also called massively parallel sequencing (MPS), is rapidly evolving and creating new possibilities for more sensitive methods of genetic typing of forensic samples. This technology enables high samples and genetic marker multiplexing of conventional forensic loci and investigative data. Sequencing STRs using NGS has enabled the identification of STR isoalleles, sequence variants that do not differ by size (length), but do differ in the underlying sequence. The forensic community is eager to use this additional sample variation in instances where traditional capillary electrophoresis has limited interpretation, such as complex mixtures and degraded samples; however, no comprehensive resource has existed that compiles allele frequencies of sequence-based STR loci across multiple populations. In the current project, the complete population study analyzed autosomal STR loci for approximately 900 samples, and frequencies were calculated based on sequence composition. Overall, sequence-based allelic variants (isoalleles) were observed in 20 out of 22 STR loci commonly used in forensic DNA genotyping, with the highest number of isoalleles observed in locus D12S391. Although the population data will be published in a forensics journal and deposited with the online STR database, STRidER, the POPSeq database cannot continue without funding. A continuation grant was proposed to the FY18 Research and Development in Forensic Science for Criminal Justice Purposes, but was not selected; consequently, the website was discontinued on December 31, 2018, at the end of this grant. 1 figure and a listing of work products |
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| Main Term(s): |
Forensic sciences |
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| Index Term(s): |
Databases; Degraded DNA Samples; DNA Typing; Mixed DNA profiles; National Institute of Justice (NIJ); NIJ final report; United States of America |
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| Grant Number: |
2015-DN-BX-K062 |
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| Sponsoring Agency: |
National Institute of Justice (NIJ)
Washington, DC 20531
North Carolina State University
Raleigh, NC 27650
US Dept of Justice NIJ Pub
Washington, DC 20531 |
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| Corporate Author: |
North Carolina State University
United States of America |
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| Sale Source: |
US Dept of Justice NIJ Pub
810 Seventh Street, NW
Washington, DC 20531
United States of America |
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| Page Count: |
12 |
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| Format: |
Document; Document (Online) |
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| Type: |
Program/Project Description; Report (Grant Sponsored); Report (Study/Research); Research (Applied/Empirical) |
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| Language: |
English |
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| Country: |
United States of America |
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To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=277829 |
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