brookcove
Posted : 6/5/2008 5:08:05 PM
By the way, here's another interesting tidbit about breed genetics. A friend of mine is involved with a canine genetics study. In part of it, they are analyzing DNA and studying population substructures. Preliminary analyses are indicating that show Border Collies are as genetically distinct from working BCs, as those working bred dogs are from other breeds.
They are not yet sure whether the split is caused by geographic isolation (most show dogs are from imported lines), or whether the split was caused by long selection for different functions. Analyzing data from Australian working dogs will give them that answer.
However, this puts an interesting monkey wrench into the validity of those genetic tests for mixed breeds. What population sample did they use to find distinctives for the Border Collie breed? If Gizmo is a McCallum Border Collie (and she could be from her personality and looks), that's yet another monkey wrench - McCallums are a working line imported directly from Australia and bred almost completely within their own gene pool. In other words, owners of McCallum dogs tend not to outcross and so these dogs are themselves isolated genetically.
How many other breeds could we find that have distinct substructures under their breed umbrella?