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Related Concept Videos

Single Nucleotide Polymorphisms-SNPs01:05

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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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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%...
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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Optimization and validation of analysis method based on 27-plex SNP panel for ancestry inference.

Li Jiang1, Qi-fan Sun1, Quan Ma1

  • 11. Beijing Engineering Research Center of Crime Scene Evidence Examination, Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China; 2. Key Laboratory of Forensic Genetics, Ministry of Public Security, Beijing 100038, China.

Yi Chuan = Hereditas
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Summary

This study developed a 27-plex single nucleotide polymorphism (SNP) panel and an optimized analysis pipeline for accurate human ancestry inference. The method achieves over 99% accuracy in differentiating East Asian, European, African, and admixed populations.

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Area of Science:

  • Genetics
  • Anthropology
  • Forensic Science

Background:

  • Traditional anthropological classifications divide individuals into East Asian, European, and African races.
  • Single nucleotide polymorphism (SNP) panels are crucial for genetic ancestry determination.
  • Accurate ancestry inference has significant applications in molecular and forensic genetics.

Purpose of the Study:

  • To establish an optimized analysis pipeline for accurate human ancestry inference using a 27-plex SNP panel.
  • To differentiate between East Asian, European, African, and admixed populations.
  • To evaluate the practical application value of the developed method.

Main Methods:

  • Genotyping using a 27-plex single nucleotide polymorphism (SNP) panel.
  • Development of an optimized analysis pipeline based on likelihood ratio, ancestry component, and individual assignment.
  • Cross-validation using a referential database and validation with 1,010 test samples.

Main Results:

  • The optimized pipeline demonstrated high accuracy, exceeding 99%, across East Asian, European, African, and admixed populations.
  • Successful differentiation of samples from diverse ancestral origins.
  • The method proved effective in characterizing DNA donor ancestry.

Conclusions:

  • The developed 27-plex SNP panel and analysis pipeline provide a highly accurate method for human ancestry inference.
  • This approach has significant practical applications in human molecular genetics and forensic investigations.
  • The method reliably determines ancestry for individuals from various global populations.