WIKI
Responsible breeding science and practice - genetic principles, health testing, and ethics.
40 entries
How population genetics explains allele frequencies, diversity, and breed structure in dogs, and why population-level data cannot predict one puppy's fate.
Why some canine traits follow single-gene inheritance while most breeder-relevant traits, including hips, cancer risk, and temperament, are polygenic.
What heritability really means in dog breeding, why narrow-sense and broad-sense are different, and why heritability never predicts one dog's fate.
What canine COI actually measures, why pedigree COI and genomic COI differ, and why COI is a population probability rather than a prediction about one puppy.
Why effective population size matters more than raw breed popularity, how Ne works in dogs, and why rules like 50/500 are heuristics rather than laws.
How small founding populations shaped modern dog breeds, why founder effects permanently narrow diversity, and what that means for Golden Retrievers.
How breed populations contract and recover, why bottlenecks erase diversity, and what repeated bottlenecks mean for modern dog breeds.
How rising homozygosity can reduce fertility, longevity, and other fitness traits in dogs, and why inbreeding depression is a population-level risk rather than an individual verdict.
What hybrid vigor really means, why heterosis is often oversold in dogs, and how outcrossing can help diversity without becoming a blanket health guarantee.
Why chance changes allele frequencies in closed dog breeds, how drift differs from selection, and why doing nothing still changes the gene pool.
How breeder choices shift gene frequencies over time, why selection has trade-offs, and what artificial selection can and cannot accomplish in dogs.
Why dog breeds do not mate randomly, how assortative mating concentrates traits, and why repeated close-to-home pairing can narrow diversity faster than expected.
Why nearby genes travel together, how one gene can affect multiple traits, and why marker association is not the same thing as causation in canine genetics.
What epigenetics means in dogs, how gene expression can shift without DNA-sequence change, and where the science ends and breeder rhetoric begins.
How dams shape offspring beyond the genes they pass on, from prenatal environment to maternal care, and why maternal effects matter in dog breeding.
How continuous traits are studied in canine genetics, what QTL mapping can reveal, and why most complex-trait DNA tests remain probabilistic.
How single-gene disease alleles work in dogs, why some inherited conditions are highly testable, and how breeder management differs from polygenic disease risk.
How recessive, dominant, and X-linked disease inheritance differ in dogs, and why the language of carrier, clear, and affected only fits certain kinds of disorders.
Why carrier status usually does not mean a dog is sick, how carriers should be managed in breeding, and why eliminating every carrier can harm diversity.
A practical guide to what dog genetic tests can and cannot tell families, from causal mutation tests to marker panels, polygenic scores, and diversity reports.
What temperament heritability means in dogs, why the numbers are population-level estimates, and how breeders can select for behavior without pretending temperament is fixed.
The breed-specific behavioral genetics of Golden Retrievers, including biddability, sociability, retrieve drive, and the important differences between lines within the breed.
Why hip dysplasia is heritable but not deterministic, how genetic selection has improved breed populations, and why phenotype still matters more than one DNA score.
How elbow dysplasia is inherited in dogs, why its subtypes complicate the genetics, and what families should understand about population-level risk versus one-dog prediction.
How hereditary cardiac risk works in Golden Retrievers, why SAS matters most in the breed, and why phenotype-based cardiac screening remains essential.
The main inherited eye conditions in Golden Retrievers, what can be managed by DNA testing, and why regular ophthalmic examination still matters.
The three main PRA mutations relevant to Golden Retrievers, how recessive inheritance works in breeding decisions, and why PRA testing is one of the clearest successes of canine DNA testing.
How Golden Retriever Muscular Dystrophy works, why its X-linked inheritance matters, and why this rare condition is scientifically important but should be excluded from pet breeding.
What Golden Retriever ichthyosis is, why its high carrier frequency matters, and how responsible breeding manages the disease without collapsing breed diversity.
Why cancer is such a major breed issue in Golden Retrievers, what part of the burden appears inherited, and why current genetic tools still offer probabilities rather than certainties.
What the literature shows about inherited hemangiosarcoma risk in Golden Retrievers, why line clustering matters, and why genetic risk remains probabilistic rather than predictive.
How inherited lymphoma risk appears in Golden Retrievers, why the condition is a breed-level problem, and why no current test resolves it with certainty.
How Golden Retriever coat color is inherited, why the cream-to-red range is mostly cosmetic, and why color selection should not be confused with health selection.
The major genes behind canine coat type, why Golden Retrievers are predictable in their basic coat profile, and where the remaining variation still comes from.
Why body size and conformation respond to selection, how Golden Retriever structure varies within the breed, and why appearance-only selection can pull health along with it.
Why retrieve drive is part of Golden Retriever breed identity, how it behaves as a heritable behavioral trait, and why line differences still matter.
Why lifespan has a heritable component, why that still does not make longevity predictable for one puppy, and how cancer and diversity shape the Golden Retriever picture.
How Scott and Fuller's long-running dog study established the field of canine behavioral genetics and why it still matters for temperament and early development.
What the Belyaev fox experiment demonstrated about selection on tameness, what it can teach dog breeders, and where the comparison must stop.
The Just Behaving breeding priority order: temperament first, health screening as a non-negotiable filter, and conformation kept secondary to the life the dog will actually live.