Related Experiment Video
Updated: Jun 25, 2025
08:35
Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes
Published on: July 17, 2021
20.2K
MHBase: A comprehensive database of short microhaplotypes for advancing forensic genetic analysis
Jiaming Xue1, Mengyu Tan1, Qiushuo Wu1
1Department of Forensic Genetics, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, China.
Forensic Science International. Genetics
|May 25, 2024
Summary
Microhaplotypes (MHs) offer improved forensic analysis. A new comprehensive database and website (MHBase) were developed for MH marker discovery, population studies, and forensic applications.
Area of Science:
- Forensic genetics
- Population genetics
- Bioinformatics
Background:
- Microhaplotypes (MHs) are valuable genetic markers for human identification, kinship, mixture deconvolution, and ancestry prediction in forensics.
- Existing databases like ALFRED and MicroHapDB house MH information, but a more comprehensive resource was needed.
- Previous work established a SNP-SNP MH database (D-SNPsDB) for 26 populations.
Purpose of the Study:
- To construct a comprehensive microhaplotype database (MHBase) including both SNP-based and InDel-including MHs.
- To develop a user-friendly website for searching MH loci, performing calculations, and analyzing population data.
- To provide an accessible tool for researchers in marker discovery, population genetics, and forensic assay development.
Main Methods:
- Selected MHs with at least two variants (SNPs and/or InDels) within 50 bp from the 1000 Genomes Project dataset (Phase 3).
- Integrated physical genome positions, variant identifiers (rsIDs), allele frequencies, and variant information.
- Developed a website with search functionalities, online calculations (PHASE software), and ancestral parameter computations.
Main Results:
- Constructed MHBase, a comprehensive database of MHs across 26 populations, classifying loci as SNP-based or InDel-including.
- Established a functional website enabling users to search for suitable MH loci based on research needs and populations.
- Analyzed shared loci, ancestral markers, genetic distances, and genome annotation, providing insights into MH distribution and utility.
Conclusions:
- MHBase and its associated website provide a valuable, accessible resource for the forensic genetics and population genetics communities.
- The database facilitates marker discovery, population studies, and the development of forensic genetic assays and panels.
- The comprehensive data and tools support advanced applications in human identification, kinship, and ancestry analysis.
Related Concept Videos
02:34DNA Microarrays
17.3K
Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
17.3K
02:26Comparing Copy Number Variations and SNPs
17.7K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.7K