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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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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
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Next-Generation Snow Leopard Population Assessment Tool: Multiplex-PCR SNP Panel for Individual Identification From

Katherine A Solari1, Shakeel Ahmad2, Ellie E Armstrong1,3

  • 1Department of Biology, Stanford University, Stanford, California, USA.

Molecular Ecology Resources
|January 31, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a cost-effective, user-friendly single nucleotide polymorphism (SNP) panel for identifying individual snow leopards from non-invasive fecal samples. This method is broadly applicable for conservation genetics in any country.

Keywords:
SNP panelfaecesindividual identificationmultiplex PCRsnow leopard

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Area of Science:

  • Conservation Genetics
  • Wildlife Forensics
  • Genomic Analysis

Background:

  • Existing single nucleotide polymorphism (SNP) panel methods for non-invasive sample genotyping lack broad usability for international conservation.
  • Key limitations include high cost, complex laboratory protocols, and inaccessible bioinformatics for panel design and analysis.

Purpose of the Study:

  • To present a broadly applicable, cost-effective, and user-friendly method for SNP panel development and analysis.
  • To develop and validate a multiplex PCR SNP panel for snow leopard (Panthera uncia) individual identification using fecal samples.

Main Methods:

  • Development of a 144-SNP multiplex PCR panel utilizing next-generation sequencing technology.
  • Validation using paired tissue and fecal samples from zoo individuals, assessing allele call accuracy.
  • Application to 235 field-collected fecal samples from Pakistan to evaluate reliability with low-quality and contaminated samples.

Main Results:

  • The developed SNP panel demonstrated a minimum of 96.7% accuracy in allele calls per run.
  • Reliable individual identification was achieved from low-quality, aged, and contaminated field-collected snow leopard fecal samples.
  • The panel successfully identified first-order relatives and provided insights into sample geographic origins.

Conclusions:

  • The presented SNP panel development method is cost-effective, streamlined, and user-friendly, suitable for diverse conservation projects.
  • This tool empowers snow leopard research for population assessment and can be adapted for other species with available genomic data.