Name: Nova
DOB: March 23, 2025
Coat: Medium Golden
Weight: 55 Lbs.
Registration: AKC SS1777905
Microchip: 900263002820923
Breeding popular sire-less (or "alternative sire") golden retrievers is a critical strategy in population genetics to mitigate the Popular Sire Effect, a phenomenon where a few highly decorated or physically desirable males sire a large percentage of the next generation. This over-reliance causes significant, long-term harm to the breed's genetic health.
- Preservation of Genetic Diversity: By utilizing a broader, more diverse range of stud dogs, breeders prevent the gene pool from narrowing, which is essential for the long-term sustainability of the breed.
- Reduced Inbreeding Coefficients (COI): Overusing popular sires rapidly increases the inbreeding coefficient, which is linked to reduced fertility, smaller litter sizes, and shorter lifespans. Avoiding these sires keeps COI levels at or below the annual breed average.
- Limiting the Spread of Genetic Diseases: Popular sires, despite having good phenotypic traits (appearance), may carry hidden recessive genetic defects. The excessive use of a single male can rapidly spread these harmful genes throughout the population.
- Average Unique Ancestors (10 Generations): For many registered purebreds with fairly complete pedigrees in K9Data, the number of unique ancestors found in a 10-generation pedigree (which has a theoretical max of 2,046) often ranges between 500 and 950+. Nova has 1,119.
- Ancestor Loss (AVK): K9Data uses the AVK (Ancestor Loss Coefficient) to measure the difference between potential ancestors and actual unique ancestors. High-inbreeding, popular-sire scenarios often result in an AVK where only 15% to 50% of ancestors are unique, meaning over 50% of the possible slots are filled by repeated individuals.
- Example from K9Data: A typical 10-generation pedigree might have 954 unique ancestors out of 2,046, representing over 50% ancestor loss.
- Significance: Pedigrees with low AVK (fewer unique ancestors) indicate high concentration (linebreeding/inbreeding).
Standard Canine Genetic Health Screening
Panels test for mutations associated with various inherited diseases, including those that can affect lifespan, quality of life, or require specific treatments.
- A "Clear" means the dog does not carry the specific genetic mutations associated with certain diseases or conditions. This implies the dog is not at risk of developing those conditions and will not pass the abnormal gene to its offspring.
- A "Carrier" refers to a dog that has inherited a copy of a recessive gene mutation for a specific genetic disorder, but does not show symptoms of the condition themselves. While not affected by the condition, they can still pass the mutated gene to their offspring.
- An "affected" result indicates that the dog possesses the specific gene variant linked to a particular disorder.
VGL Genetic Diversity Test Results
Internal Relatedness: The IR value is a measure of genetic diversity within an individual that takes into consideration both heterozygosity of alleles at each STR loci and their relative frequency in the population. Therefore, IR values heterozygosity over homozygosity and uncommon alleles over common alleles. IR values are unique to each dog and cannot be compared between dogs. Two dogs may have
Percentage Occurrence
1003 = 0.1492 2001 = 0.1497
1065 = 0.2711 2048 = 0.2738
100% Heterozygous at DLA I & DLA II
Haplotypes are valuable tools in genetics for understanding the relationship between genetic variation and various phenotypes, including disease susceptibility, ancestry, and even response to medication. They provide insights into the complex i
Heterozygous - 21
Homozygous - 12
63% Heterozygous for n = 33