Rep z Pohranìení

[yukidomari]

Originalmente publicado por Nebulosa

The problem is not Rep, in several breeds you can meet even more restricted genetic pool, even if all dogs comes back to Rep in 8 or 9 generation, differents preferences in the selection of the breed should mantain the tipicity while at the same time as small diferences from region to region will appear, also as different genetical conections, which can garantee the genetical diversity enough to preserve the breed.

I agree with this.. the problem is not Rep but rather informed (or not informed) decisions on future breeding. In basic understanding of line-breeding or tightly in-bred lines, the problem is only that bad/unwanted traits have the ability to more quickly or severely manifest, but the same is true for good/wanted traits as well.

Breeding from dogs with low relationship to Rep only increases the likelihood that unwanted genes or attributes will be diluted. It's not a guarantee nor does it mean that outcrosses are always the best bet in breeding choices.
It is highly possible that relatively unrelated dogs have their own set of unwanted genetic traits or even identical ones.. so it's not as simple as selecting dogs that are more unrelated.

Many breeds have even smaller genetic pools, some as small as 4 founding dogs.

In the far future, it is inevitable that all closed gene pools of any breed of dog will meet a genetic bottle-neck, but good management at this point can prolong the genetic health of this closed genetic pool.

With this in mind, "interesting bloodlines" can only be used so far in justification for using a dog as a potential stud. I can understand why Iran may be used, as his faults are relatively minor in comparison with what he can contribute genetically, but at the same time a dog with disqualifying faults such as with poor dentition, falling ears, or a cowardly character should be very carefully, if at all, considered for breeding, no matter how interesting his genetics. Perhaps those genes are ones that are not meant to be carried to the next generation.