Dogs are going to throw their traits so I believe the simple answer is yes.

History proves that closely and loosely bred performing animals reproduce themselves, but you can also get great performing animals from crosses. It is a fact some old timers did not test their bitches and used them as brood to produce. So the genetics game can be a gamble.

You can stack the deck in your favor selecting the best from within your line and only going out to refresh what you may be lacking if you are lacking. Selection is key.

S_B