Most cases of popular
sire syndrome take place once a stud has been awarded a Champion and also gave birth to one or multiple champion dogs.
The popular
sire syndrome is a direct consequence of selective dog breeding to the extreme, especially with breeders practicing grading up (where the same dog, usually a stud, is used over several breedings with, at each breeding, a the best partner or candidate from his own descendants).
Moving forward, if breeders continue to only breed healthy and exceptional specimens of a breed and stay away from the popular
sire syndrome at all cost; their breed's whole population will be protected from inherited health conditions.
Diversity is therefore reduced by the presence of popular sires, in what is often called «popular
sire syndrome» or «founders effect».
Not exact matches
The situation of a single
sire having this kind of drastic genetic effect on a breed became known as the «Impressive
Syndrome.»