Genetic Analysis of Plains and Butler's Gartersnake Hybridization

John S. Placyk's 2020 study uses AFLP markers and ND2 mitochondrial DNA sequences to analyze hybridization between Thamnophis radix and Thamnophis butleri. The research assesses divergence timescales and tests if the Great Lakes region hybrid zone is of recent origin. Findings indicate shallow mtDNA divergence and high genetic variation within the contact zone.

Use Cases

• Analyze AFLP marker patterns to infer population structure and admixture levels between T. radix and T. butleri.
• Compare ND2 mitochondrial DNA sequences to assess phylogenetic relationships and divergence times among Thamnophis species.
• Test for evidence of recent hybrid zone formation by examining genetic variation patterns within the contact zone.
• Use phylogeographic methods with the genetic data to distinguish between natural long-term interaction and recent secondary contact.

Strengths

• Data includes genetic markers (AFLP and ND2 mtDNA) from three closely related gartersnake species across their North American ranges.
• Research addresses a specific conservation question regarding the threat or natural status of hybridization between species of concern.
• Dataset is published under a permissive CC0 1.0 public domain license, facilitating reuse.

Limitations

• Sample size, specific row count, and column structure of the underlying genetic data are not provided in the metadata.
• The raw genetic data files and their formats are unspecified, which may require specialized bioinformatics tools for analysis.
• Analysis is constrained to the specific markers (AFLP and ND2) used, limiting broader genomic inferences.

Provenance

Source

Dryad digital repository.

Collection Method

Genetic data collected via AFLP marker assays and ND2 mitochondrial DNA sequencing.

Freshness

Last updated in 2020.

Geography

Great Lakes region and broader North American ranges of Thamnophis radix, T. butleri, and T. brachystoma.