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Updated: Jun 20, 2025
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Infinium Assay for Large-scale SNP Genotyping Applications
Published on: November 19, 2013
38.9K
Development and implementation of nested single-nucleotide polymorphism (SNP) assays for breeding and genetic
Qijian Song1, Charles Quigley1, Ruifeng He1
1USDA-ARS, Soybean Genomics & Improvement Laboratory, Beltsville, Maryland, USA.
The Plant Genome
|July 22, 2024
Summary
New soybean (Glycine max) genotyping assays, SoySNP3K and SoySNP1K, offer reduced SNP numbers for efficient genomic selection and breeding. These assays provide valuable genomic tools for soybean research and development.
Area of Science:
- Plant genetics and genomics
- Agricultural science
- Molecular breeding
Background:
- SoySNP50K and SoySNP6K are established soybean genotyping assays.
- SoySNP50K analyzes the USDA Soybean Germplasm Collection.
- SoySNP6K is used for quantitative trait loci mapping.
Purpose of the Study:
- Develop new soybean genotyping assays (SoySNP3K and SoySNP1K) for genomic selection and breeding.
- Create assays with reduced SNP numbers while maintaining haplotype diversity.
- Incorporate trait markers for enhanced breeding applications.
Main Methods:
- Developed SoySNP3K (3072 SNPs) and SoySNP1K (1252 SNPs) based on SoySNP50K and SoySNP6K.
- Selected SNPs to minimize linkage disequilibrium and maximize haplotype diversity.
- Utilized high-quality, polymorphic SNPs with high minor allele frequencies.
Main Results:
- SoySNP3K and SoySNP1K assays were developed with nested SNP densities.
- SNPs were chosen for high polymorphism and quality, suitable for targeted sequencing.
- Mean minor allele frequencies were 0.25-0.33 in US elite soybean populations.
Conclusions:
- SoySNP3K and SoySNP1K are valuable, low-cost genomic tools for soybean genetic and breeding research.
- These assays facilitate genomic selection, parent selection, and population characterization.
- A series of nested assays (SoySNP1K, SoySNP3K, SoySNP6K, SoySNP50K) offer flexible marker densities.
