09/28/2026
Last Friday at the Canine Summit I had a chance to have lunch with an AKC HT Judge and a Veterinarian. Also speaking at the summit.
We had a great conversation about breeding for phenotypes and what it produced in the field vs. what it produces in the office.
The vast majority of attendee questions focused heavily on the Coefficient of Inbreeding (COI), revealing a widespread misconception among breeders that a low COI is the definitive solution to preserving genetic diversity. In reality, a low COI is only a single piece of a much larger puzzle. True genetic sustainability requires a holistic approach that balances mean kinship (mK) to measure a dog's relationship to the entire population, haplotype diversity to safeguard immune system health, the founder genome equivalent to track lost ancestral genetics, and effective population size Ne to monitor population bottlenecks.
I discussed what I do -
To reduce Mean Kinship (mK) and protect your breed’s genetic future, you must shift your focus from individual pedigrees to population-wide management.
1. Identify and Breed "Genetic Outliers" Locate underrepresented lines: Look for healthy, quality dogs from isolated geographic regions, working lines (if separate from show lines), or prefixes that did not follow mainstream breeding trends. Prioritize low-mK individuals: Even if a dog isn't a top show champion, if it is structurally sound, healthy, and has a below-average mK, its genetic value to the breed’s survival is incredibly high.
2. Impose Strict Limits on the "Popular Sire Effect" Set lifetime litter caps: The fastest way to skyrocket a breed's average mK is to allow a few popular champions to sire dozens of litters. This floods the gene pool, making everyone related to the same grandfather. Utilize full brothers: If a specific line has exceptional traits you want to preserve, breed from the champion's less-used, healthy brothers rather than putting all the demand on a single dog.
3. Use Population Management and Matchmaking Software Simulate matings digitally: Aim for breed average or lower: Select pairings where the resulting puppies will have an mK score that is equal to or lower than the current breed average.
4. Implement a "Matrix" Breeding Strategy Avoid breeding "like to like" genetically: Instead of pairing the most genetically common dogs together, breed low-mK dogs to average-mK dogs to gradually pull the entire breed’s average down.
Keep offspring from rare lines: When you do manage to produce a litter from a low-mK dog, ensure that multiple puppies from that litter go to breeding homes so those rare genetics are not lost in a pet home.
Using the UC Davis VGL genomic panel—specifically Internal Relatedness (IR) and Genetic Diversity (GD)—allows breeders to lower Mean Kinship (mK) by replacing paper-pedigree guesswork with actual DNA data. By analyzing the GD profile, breeders can identify "genetic outliers" that carry rare, underrepresented alleles and immune system (DLA) haplotypes; because these dogs carry the least common genetics in the breed, they mathematically possess the lowest mK. Furthermore, by evaluating a dog's IR score (which measures biological inbreeding against breed-wide allele frequencies) and using VGL-linked mating simulators, breeders can actively avoid pairing dogs that carry the same dominant, overrepresented genes. Actively selecting for rare alleles and executing simulated outcrosses that drive IR scores into the negative directly prevents the breed from bottlenecking, successfully lowering the average mean kinship of the entire population over time.
When a breed undergoes the VGL Canine Genetic Diversity Test, UC Davis releases a public, breed-wide report listing every single documented DLA Class I and Class II haplotype along with its exact mathematical frequency in that population. (1,139 registered dogs) Breeders can access these data tables directly on the VGL Canine Genetic Diversity website to cross-reference their own dogs' certificate results. By identifying haplotypes with highly fractional frequencies (e.g., frequencies of 0.01 or lower, meaning they appear in less than 1% of tested dogs), breeders can pinpoint exactly which individuals carry the breed's rarest immune genetics and purposefully incorporate them into their lines to push mean kinship (mK) down.
This genomic strategy represents a massive paradigm shift that the vast majority of breeders completely miss. Most breeders remain comfortably trapped in the "COI vacuum," believing that a low pedigree percentage on paper means they are doing right by their breed. They do not realize that paper pedigrees assume historical ancestors were completely unrelated, which is a mathematical impossibility in closed-register purebred dogs. By focusing strictly on COI, a breeder can inadvertently mate two dogs with a "0% COI" that actually carry the exact same, overrepresented, high-mK alleles at the DNA level—further bottlenecking the breed while believing they are practicing diversity.
So, I shared a similar story: Imagine a man and a woman meet at a festival. They swap family trees, look back 4 or 5 generations, and find absolutely no shared names. On paper, their 'COI' is 0%. They assume they are completely unrelated, marry, and have children. But here is the catch: both of their families have lived in the exact same isolated, tiny mountain village for 300 years. Even though they don't share a recent grandfather on paper, their ancestors have been marrying the neighbors for centuries. Because the village's gene pool is so small, they are actually walking genetic twins. At the DNA level, they are passing down the exact same, highly concentrated genes to their children.
I told them that your goal as a preservation breeder is to seek out lines that have been geographically or historically isolated. In the golden retriever world, this means looking outside your mainstream pedigrees.
WM Farms Breed Preservation will lower mK by integrating the following goldens:
Nova - Outlier or heritage pedigree back to the 1970s.
Rose - Western US born golden who is 1/2 performance back to a outlier or heritage pedigree.
Farah - Western US born golden who is 1/2 performance back to a outlier or heritage pedigree. With a -.15 IR and GD over 60%.
I will first introduce UK genes into their lines, then, DDHF, then CH, back to gundog and finally re-introduce performance lines at the F3 or F4 crosses. These will yield 4 generations of subpopulations available through frozen of live available today.