Genotyping-by-sequencing performance in selected livestock species

Area of Science:

• Animal Genetics
• Genomics
• Molecular Biology

Background:

• Large-scale livestock genotyping is hindered by high costs and complex data analysis.
• Restriction enzyme-based enrichment techniques like genotyping-by-sequencing (GBS) offer a promising solution.
• GBS reduces costs through sample multiplexing and targeted sequencing.

Purpose of the Study:

• To evaluate the performance of a standard PstI endonuclease-adapted GBS protocol for population genetics.
• To assess GBS applicability across different livestock species (cattle, horse, sheep) and sequencing depths.
• To determine the utility of GBS-identified single nucleotide polymorphisms (SNPs) for population genetics.

Main Methods:

• Application of a standard PstI-endonuclease adapted genotyping-by-sequencing (GBS) protocol.
• Testing GBS across cattle, horse, and sheep populations.
• Utilizing varying sequencing depths, including low-depth setups.
• Analysis of single nucleotide polymorphisms (SNPs) for polymorphism and genomic distribution.

Main Results:

• Detected SNPs exhibited desirable polymorphism parameters.
• SNPs were evenly distributed across the genome, including gene-coding regions.
• GBS successfully identified genetic differentiation among studied breeds.
• The method proved effective even with low-depth sequencing.

Conclusions:

• Genotyping-by-sequencing (GBS) is a cost-effective alternative for livestock genotyping.
• GBS provides valuable data for population genetics studies in various livestock species.
• The PstI-adapted GBS protocol is robust and adaptable for different research applications.