knabe said:
It’s pretty clear there are no such things as breeds from dna analysis.
Breed associations are merely mostly known pedigree repositories.
Nothing more, nothing less.
Really just appendix registries.
Not good or bad.
To some degree knabe, you are probably right.
We are having a discussion right now with dairy breeds. The CDCB (Council on Dairy Cattle Breeding) has came out with BBR (Breed Base Representation) where the breed percentages of an animal can be determined by the DNA SNP's.
While we ourselves as a registry do more research and do our best to document the ancestry of an animal, ultimately that information (even from other breed association is based on what breeders have provided.
One place that we are different is the fact that we want to document ALL known ancestry. So many associations, if an animal is out of a registered cow of a different they breed, they will not document it.
Back to breed percentages. On a dairy bull from our research for his pedigree, we have him with 29% Brown Swiss, 50% Ayrshire breeds and 21% Holstein. The surprising part is his BBR. He comes back as being only 25.9 Ayrshire breeds, 39.5 Brown Swiss, 31.7 Holstein and 2.9 percent Jersey.
As genomics become more widely used and the SNP markers are available, then breed purity on animals can be questioned.