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Related Experiment Videos

A genome-wide scalable SNP genotyping assay using microarray technology.

Kevin L Gunderson1, Frank J Steemers, Grace Lee

  • 1Illumina, Inc., 9885 Towne Centre Dr., San Diego, California 92121, USA. kgunderson@illumina.com

Nature Genetics
|April 20, 2005
PubMed
Summary
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We developed a novel array-based whole-genome genotyping assay for direct genomic analysis. This PCR-free method offers high accuracy and effectively unlimited multiplexing for single nucleotide polymorphism (SNP) genotyping.

Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Oligonucleotide probe arrays facilitate gene expression analysis.
  • Microarray application to genomic DNA analysis is limited by genome complexity.
  • A direct genomic assay with single base resolution is needed.

Purpose of the Study:

  • To develop a novel array-based whole-genome genotyping assay.
  • To overcome limitations of current microarray technology for genomic DNA analysis.
  • To enable high-throughput, single base-resolution genomic assays.

Main Methods:

  • Developed a PCR-free, array-based whole-genome genotyping assay.
  • Utilized specific hybridization of whole genome-amplified DNA to arrayed probes.
  • Incorporated allele-specific primer extension and signal amplification for high signal-to-noise ratio.

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Main Results:

  • Successfully genotyped several hundred previously characterized single nucleotide polymorphisms (SNPs).
  • Achieved high signal-to-noise ratio through optimized hybridization and extension techniques.
  • Demonstrated conversion rate, call rate, and accuracy comparable to PCR-based assays.

Conclusions:

  • The developed assay is a robust, PCR-free method for whole-genome genotyping.
  • This technology extends microarray capabilities to direct genomic DNA analysis.
  • The assay offers high performance and scalability for SNP genotyping.