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Transcriptome annotation reveals minimal immunogenetic diversity among Wyoming toads, Anaxyrus baxteri
Kara B Carlson1, Dustin J Wcisel1, Hayley D Ackerman1
1Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, NC, USA.
Conservation Genetics (Print)
|April 24, 2023
Summary
The Wyoming toad has low major histocompatibility complex (MHC) diversity, increasing disease vulnerability. Conservation efforts must focus on boosting genetic variability for this species, crucial for captive breeding and reintroduction success.
Area of Science:
- Conservation genetics
- Amphibian immunology
- Population genomics
Background:
- The Wyoming toad (Anaxyrus baxteri) faces extinction risk, with captive breeding essential for population support.
- Rapid population declines, partly due to fungal diseases, highlight the need to assess immune gene diversity.
Purpose of the Study:
- To investigate the diversity of immune receptor genes, specifically toll-like receptors and MHC, in the Wyoming toad.
- To assess if population bottlenecks have reduced immunogenetic diversity, potentially increasing disease susceptibility.
Main Methods:
- Comparative transcriptomics was employed to analyze toll-like receptor and MHC sequences.
- Sequences from three individual Wyoming toads were compared.
Main Results:
- Wyoming toads exhibit reduced diversity in major histocompatibility complex (MHC) genes when compared to other toad species with similar population bottleneck histories.
- Toll-like receptor diversity was also examined.
Conclusions:
- The study reveals a critical lack of MHC diversity in the Wyoming toad, posing a significant conservation challenge.
- Findings provide a basis for future research on Wyoming toad genetic diversity, disease biomarker identification, and breeding strategies to enhance wild population success.
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