Maximizing the Quality of Non-Invasive Samples for Conservation Genetics Using Targeted Next-Generation Sequencing: A...

Area of Science:

• Wildlife Biology
• Conservation Genetics
• Molecular Ecology

Background:

• Non-invasive fecal DNA sampling is vital for wildlife research, management, and conservation.
• Obtaining high-quality fecal DNA is challenging due to numerous variables, particularly sample collection and storage.
• Effective fecal DNA preservation is critical for accurate genetic analysis in wildlife studies.

Purpose of the Study:

• To compare seven fecal DNA preservation methods for targeted genotyping.
• To enhance the quality and quantity of DNA extracted from fecal samples.
• To provide recommendations for optimal field-based fecal sample collection and storage.

Main Methods:

• Seven different fecal DNA preservation methodologies were tested on fresh koala (Phascolarctos cinereus) scats.
• The proportion of missing single nucleotide polymorphism (SNP) data was assessed for each method.
• A targeted genotyping approach was employed to evaluate DNA recovery and quality.

Main Results:

• DNA was successfully extracted using all tested preservation methods.
• A lysis buffer and washing (lysis shaken) methodology yielded optimal DNA recovery, comparable to tissue samples.
• This method significantly reduced missing SNP data, improving genotyping success.

Conclusions:

• The lysis buffer and washing technique offers a significant advantage for fecal DNA extraction.
• Optimized fecal sampling methods enhance the ability to address critical questions in population ecology and conservation genetics.
• Improved fecal sampling techniques support better conservation strategies and decision-making for wildlife populations.