Genetic diversity for breeders: why it matters and how to protect it
Why a shrinking gene pool causes more inherited disease, not less, and the concrete steps, outcrossing, genetic testing, and sire limits, that keep a breeding program healthy.
Genetics
A genetic test is a starting point, not a guarantee
Testing a pairing for known hereditary conditions rules out the risks that are already well understood. It won't rule out everything, since not every condition has a genetic marker identified as yet, but it's still the most useful tool there is before committing to a pairing.
Diversity matters every bit as much as any single test result
A breed with a small founding population carries less genetic diversity overall, which raises the baseline risk for a range of conditions no matter what any one test shows. It's part of the reason some breed clubs actively encourage outcrossing.
Do genetic tests cover every hereditary condition?
No. They cover conditions that already have a genetic marker identified. New markers are still turning up, so a clean result isn't a cast iron guarantee.
What is genetic diversity and why does it matter for a breed?
It's the range of genetic variants found within a breed population. Low diversity raises the chance of inherited conditions spreading widely over generations.
Genetic Screening for Breeders: What It Tests For and How to Use the Results
A practical guide to genetic screening for dog and cat breeders: what the tests detect, how to read the results, and how to pair animals responsibly.
