Canine Pedigree Analysis - Inbreeding/Linebreeding?

[supaflyskye]

In a breed that is not generally prone to genetic health problems, at what point what inbreeding concern you?
I know nothing about canine pedigrees, please help educate me!

I was trying to just put the raw info w/o linking to specific pedigrees but I’m confusing myself and having a hard time w/ it. So I’m just going to link to a pedigree.
Please note, this is a hypothetical dog and not a breeding that has actually taken place. The dogs listed in the pedigree are not mine nor am I directly affiliated w/ them.

There is some inbreeding in this pedigree …enough to potentially cause problems? I’m just trying to learn. Thanks in advance!

Pedigree

[S1969]

I don’t think it looks that close, but then again, I own a different breed and the health risks might be different. My dog’s breeding is closer, I think. But my dog was bred by someone who has bred/showed/owned the breed for over 30 years and who has access to probably ever stud dog in the country. It was very intentional, as opposed to “hoping for the best” out of what was available.

Hoping some experienced breeders chime in to give insight as to line breeding.

But I do think the best thing if you really want to know or consider breeding yourself is to hook up with an experiend breeder who knows this particular breed.

[supaflyskye]

I am not looking to breed myself, but am looking into purchasing a puppy from a breeder for the first time, and I want to make sure I do my research.

A breeder I am looking into is planning to use this bitch for a 2012 litter, but has not decided on a stud. The stud used in the hypothetical pedigree is one that they are considering.

I saw some inbreeding in the pedigrees right off(Paradise As Good As It Gets and Serandida’s Sultan Of Cairo) the but wasn’t sure if it was close enough to be anything of notable concern. Like I said, I know nothing about canine pedigrees, but I’d really like to learn.

Thanks for the input!

[S1969]

[QUOTE=supaflyskye;5662043]
I am not looking to breed myself, but am looking into purchasing a puppy from a breeder for the first time, and I want to make sure I do my research.[/QUOTE]

Aha, well that’s very different!

I would ask the breeder how they choose? And also what they hope to get out of any particular breeding. But before that I’d ask them all about their dogs – the health of their puppies, what type of congenital issues this breed has an how they screen for them, and look at show records, etc. Ask for vet references and show/pet home references too. Most (especially show breeders) will have a long list of people that they would have you talk to if you want to know more about their breeding.

Just from my limited experience, good breeders really do have access to lots and lots of potential mates. So when they “line breed” it isn’t because they don’t have options, it’s because they are looking to repeat certain qualities. I think that most good breeders are very careful because it’s really expensive to breed a litter and lord knows that if it’s not good everyone will know about it.

I do hope, however, that someone who is a breeder will post about line breeding. My dog’s breeder can go on for days about how she chooses potential matches but soemtimes I get lost. :lol:

ETA: looking at my show dog’s pedigree, it is closer. But there are no “lines” or in-breeding until 3 generations back. Then it is closer. So that may make a difference – the closer to the puppy in question, the farther the gene pool the better. In our case, at the Great-Grandparent level, 4 of the 8 great-grandparents of of common ancestry; each mated with a dog not of the same ancestry. Boy, that’s confusing.

[supaflyskye]

From what I understand the breed has some risk of hereditary deafness and eye problems. This breeder has puppies’ vision and hearing checked before they leave. Breeding stock have their vision rechecked as well as being tested for thyroid and cardiac problems, and elbow dysplasia before being bred.
I trust that they are a responsible breeder, I just wanted others opinions on any thoughts they might have or issues they might see w/ the mating generally. If dogs are anything like horses, I would think that there may be many varying opinions on what constitutes good breeding choices.
Obviously I don’t expect everyone here to be experts on Ibizan Hound bloodlines, but the inbreeding stood out to me and I was hoping to gain some general knowledge on dog breeding, linebreeding, inbreeding, etc.

I am going up to their facility to see some of their dogs in person in a couple months, and am planning to get much more information on their stud choices and breeding practices then.

Thanks again for the info. I too hope that an experienced breeder will chime in.

[Marshfield]

I wouldn’t be worried about it. Looks somewhat similar to the breeding I did a couple of years ago. I bred my bitch to her half uncle. Iris’s grandfather was the stud’s father. I wanted to solidify the impact of a ROMX stud in my program. I got exactly what I was looking for.

For the hypothetical litter you’re looking at, there seems to be very little repetition.

[iechris]

I breed dogs with people who have been in our breed since the 70s. My one bitch has a COI of 31%, from several generations of 1/2 brother/sister matings. My current litter has a COI of 13%, as the dam was an outcross and this is the breeding back into our line.

I have friends in a variety of breeds that have been very successful with linebreeding, with various degrees of closeness in the pedigree.

Linebreeding will bring out both the good and bad faults. Constantly outcrossing can hide these things, but sooner or later, they tend to come out, often when you least expect it.

I would talk to the breeder about how the structure their breeding program and why. My last litter had been planned since we brought the bitch home at 8 weeks (stud fee puppy), she was bred at 7 1/2 to the son of the dog we had originally planned to breed her to. With a line breeding, you should have more of an idea what you will be getting temperament wise, structure wise and health wise.

I’m obviously a major fan of linebreeding, others will tell you it is horrible and you should run far away from any line bred dogs.