Genetics

DNA Panel Testing

Commercial genetic tests analyzing a dog's DNA from a cheek swab or blood sample to screen for known disease mutations, breed composition, and genetic traits. Major panels test 150–250+ conditions.

DNA panel testing analyzes a dog’s genetic material — collected via cheek swab or blood sample — against a database of known disease-causing mutations. Commercial panels have expanded rapidly since 2010; current tests can screen 150–250+ conditions in a single panel.

Major Commercial Platforms

  • Embark: largest disease panel (~250 conditions); breed composition; Wisdom Panel partnership with Mars; research-grade SNP chip
  • Wisdom Panel: breed identification and health conditions; available through veterinarians and direct-to-consumer
  • UC Davis Veterinary Genetics Laboratory: academic laboratory; specific single-condition tests with high analytical validity; gold standard for many conditions
  • OFA DNA database: repository for health test results from multiple laboratories

What Panels Test

Disease mutations: known single-nucleotide variants (SNVs) or insertions/deletions associated with specific heritable conditions. Each mutation is identified individually — panels test only conditions where the causative mutation is known and validated.

Breed composition: SNP-based breed identification comparing against reference breed databases. Consumer breed ID testing.

Genetic traits: coat color, coat type, body size prediction, exercise tolerance traits.

Limitations

  1. Only known mutations: panels cannot detect unknown or novel mutations. A “clear” result means the dog does not carry tested mutations — not that it is free of all genetic disease risk.
  2. Incomplete penetrance: some mutations are present without full disease expression; genetic risk is probabilistic, not deterministic.
  3. Population databases: breed composition results depend on the reference database quality; rare breeds have lower accuracy.
  4. Not a substitute for clinical screening: OFA hip/elbow evaluation, cardiac monitoring, and eye exams detect conditions that DNA testing cannot predict (polygenically influenced or environmentally triggered diseases).

Practical Use

DNA panels are most valuable for:

  • Identifying carrier status before breeding
  • Confirming MDR1 mutation status in herding breeds (drug sensitivity management)
  • Breed composition in mixed-breed dogs
  • Targeted screening for known breed-specific risks