popular sire syndrome

Genetic Diversity, Problematics of Popular Sire Syndrome, and Benefits of Comprehensive DNA testing – Real-life Examples from the Coton de Tulear Breed

The world’s most complex and comprehensive genetic test for dogs, MyDogDNA, has been available for all dog owners for about a year. During this time, Coton de Tulears have been tested to the extent that it is possible to have a first look at the diversity level of this breed. This article also describes a real-life example, encountered in the breed, of how a genetic defect causing a genetic disorder can spread rapidly through popular sires.

The Pox of the Popular Sire

The most common admonition of the geneticist to the dog breeder is to "avoid the Popular Sire Syndrome". At the same time, the most common advice from breeder to breeder is to breed "the best to best". So the conundrum is obvious and the consequence predictable - the "best" dogs are the most sought after, so they sire the most offspring and become popular sires.