If you have two superlative dogs and NEED to lock in certain traits, then this close of a pairing may assure this. However, If you have ANY undesirable dominant gene pairs, be assured that they will surface. You also run the risk of introducing recessive carriers in the puppies produced. I do not recommend that you breed this close if you have not genetically tested your breeding pair for genetically transmissible defects that are common to your breed.
Now that I got that out of the way, if you have a pair of exceptional dogs that pass the Darwin test and you want to set type, there is no faster way to do that then a "Father X Daughter" Mother X Son" Sister X Brother" pairing. Once you have whelped healthy puppies that conform to your goals, then you will HAVE to out-cross these puppies to an unrelated yet comparable bloodline. If you are not careful with the out-cross, you will loose any advantage you gained from the inbreed. To breed inbred puppies back into your working bloodline is to welcome disaster.
Again, I feel the need to warn that this type of pairing is NOT for the inexperienced. Much more can go wrong than you can gain.
***Edited By: Deputydog on 8/6/2010 9:26:04 PM*** Reason: typo
You can't win if you don't play the game -- Me!
All cruelty stems from weakness -- Seneca
Sometimes a dog is as good as any man -- Bell/Houser
I don't think any breed club or national club would allow it, Deputy is correct in the fact that there could be very uncertain traits and the DNA is so similar, you could cause a lot of harm to the poor pups.
Plus, I can't imagine the sale-ability for a litter like this. I won't purchase from a line breeder, let alone that close of line breeding. I know a line breeder in our breed who touts the benefits, yet she is well known for creating dogs that die of Addison's disease. There are so many great dogs out there, look for another mate.
....and if you own the daughter and the father had tied with her, I would immediately get her spayed, as they no longer have the injection that prevents a pregnancy.
He is your friend, partner, defender, your dog. You are his life, love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion.
I personally do not believe in line breeding that close. There are many of our Mini Aussies who are, and it tend to bring out unwanted traits. I really could care less how perfect the dogs are, there are unwanted recessive and harmful traits such as health and structure problems that are very possible from such a close cross.
I do not line breed at the time, but if I did, it wouldn't be any closer then great great grandfather to great great granddaughter. I want at lease 3generations between them, and of those 3 no other relatives.
Even in developing a breed, father to daughter or mother to son is just way to close to be safe in my mind.