Single-nucleotide polymorphism discovery and panel characterization in the African forest elephant

Area of Science:

• Conservation Genetics
• Wildlife Management
• Genomics

Background:

• Forest elephant (Loxodonta cyclotis) populations are declining due to poaching and habitat loss.
• Collecting ecological data for dense rainforest species is challenging and costly, hindering conservation efforts.
• Genetic monitoring using single-nucleotide polymorphisms (SNPs) offers a cost-effective alternative for gathering crucial population data.

Purpose of the Study:

• To develop and validate a panel of SNP markers for forest elephants.
• To provide a new genetic resource for monitoring forest elephant populations and informing conservation strategies.
• To facilitate research on population structure, human impact, and illegal wildlife trade.

Main Methods:

• Double-digest restriction-site-associated DNA (ddRAD) sequencing was used to discover SNPs from forest elephant DNA samples collected in Gabon.
• 31,851 SNP-containing tags were identified, and a subset of 1,365 high-quality candidate SNPs was selected.
• Assay design and validation were performed using an additional 56 samples, resulting in 107 validated SNP markers.

Main Results:

• A panel of 107 validated SNP markers for forest elephants was successfully developed.
• The genotyping process demonstrated a high conversion rate (93%) and a low per allele error rate (0.07%).
• This represents the first set of validated SNP markers specifically for Loxodonta cyclotis.

Conclusions:

• The developed SNP panel provides a valuable genetic resource for forest elephant conservation.
• These genetic tools can generate reliable data to support improved conservation policies and management strategies.
• This advancement has the potential to significantly enhance conservation efforts for this elusive species.