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genetics and inbreeding/linebreeding
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KingstonTodd
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PostPosted: Tue Mar 11, 2008 12:26 pm    Post subject: genetics and inbreeding/linebreeding Reply with quote

I was reading the accected practises of the ALAA and it discourages inbreeding and line breeding in labradoodle breeding programs, even though it has been used in the past in establishing other pure breeds. On the surface I think everyone agree's that inbreeding is bad (insert image of Simpsons character Cletus). From the ALAA...
"Studies on a wide variety of species have demonstrated that highly inbred individuals frequently live shorter lives and have fewer progeny. This is called inbreeding depression." I dont think anyone disagrees with this.

In the course of my daily reading I came accross an interesting study (Science 318, 813-816, 2008) which looked at genealogical data for over 160 000 couples born over 165 years starting in 1800 in Iceland. Social and economics factors were relatively stable during this period so they attribute their findings to genetic factors.
They comcluded..

1. women who married 3rd or 4th cousins had on average one more child and 2 more grandchildren, ie were more reproductively fit, than couples far less related.

2. first or second cousins had just as many children, however those children died younger and were less reproductive.

For LD breeders this means we shouldnt inbreed, but maybe we should go searching long lost 3rd and 4th cousins Very Happy
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Jac
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PostPosted: Tue Mar 11, 2008 12:49 pm    Post subject: Reply with quote

I think it is probably inevitible that at some point we will find related dogs, and I see smiling face in your post...
Some breeder do practice inline breeding. I, personally, will continue to search for totally unrelated breeds because the theory behind inbreeding or line breeding is that you keep the really good traits in the same line...the problem is that every breed, every dog also carries bad traits and this type of breeding reproduces those bad traits, often enhancing them.
Also, in the pure breed community, over the years when those bad traits came out...they just "eliminated" the defective dog.
Another thing to keep in mind is that we now have the science that was not available before. So, the breeding practices of even 100 years ago are really outdated.
I think that the Canine Diversity Study is an excellent resource if you are interested in studying the affects and reasoning behind inbreeding or line breeding. (I'd post the link but don't have access to my "favorites" from this computer. I have posted it before though so you can do a search and find the link in my other posts.)
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Lucky Me
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PostPosted: Tue Mar 11, 2008 10:26 pm    Post subject: Reply with quote

Was flipping around on the Tegan LD site in Austailian and found this on her site-
"Male breeding dogs have a profound influence on their breed. Whereas a female can be expected to produce at best, 80 to a hundred puppies throughout her lifetime, a male can produce many hundreds, and even thousands of offspring if given the opportunity. Add to this, the current modern trend to freeze semen, which can be used long after the dog has passed on, and it is easy to see why the Stud Dog needs to be chosen with utmost care. A Stud male animal of any species is judged on his pre-potency, which means that not only must he exhibit the best phonetic traits himself, but he should also demonstrate his ability to pass along these traits to his progeny over a diverse female population. Line breeding and In Breeding are often done in the pursuit of pre-potency in breeding stock. In 'Pure' Breeds, an inbreeding co-efficient of 30% is considered to be quite low and quite acceptable."
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Napathedoodle
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PostPosted: Tue Mar 11, 2008 11:45 pm    Post subject: Reply with quote

It is crazy. I noticed that there are quite a few "popular" studs here in America, and breeders are having a hard time finding unrelated males.

But, I'll never forget reading a Irish Setter Breeder's website, when I thought I wanted one, that proudly announced breeding a dam to her grandfather.....

I think Sires should be picked very carefully, because they can produce much more, and have a longer span than most females. But, that being said, I think Sire owners should be very select in who they breed their Sires to, as to not crowd the breeding realms with their offspring, however great they may be.

IMHO
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gracielou
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PostPosted: Wed Mar 12, 2008 7:39 am    Post subject: Reply with quote

I'm not surprised you found what you did on RM's site since they did a lot of inbreeding and some line breeding. I always look at it this way would you want to have your Fathers Baby? Then it just doesn't seem so acceptable.
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MaxandMe
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PostPosted: Wed Mar 12, 2008 8:27 am    Post subject: Reply with quote

Napathedoodle wrote:
It is crazy. I noticed that there are quite a few "popular" studs here in America, and breeders are having a hard time finding unrelated males.

IMHO


Kristen i am unsure of what you mean by this? and aer these doodle breeders and do you have any of the articles you read or searches you did? i'd like to view them myself.
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Napathedoodle
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PostPosted: Wed Mar 12, 2008 10:16 am    Post subject: Reply with quote

To clarify, I meant Breeders of Doodles in America and Canada. I can pm the searches and readings I've done, if you're interested.


Similarly, the quote Luckyme posted was from Tegan Park, or Tegan ASD, or whatever they're calling themselves now. Rutland Manor has this on their page about inbreeding:

Quote:
Line Breeding, In breeding and Out Crossing

The main difference between these lies in the level of breeding one relative to another, as there is no clear cut definition of any of these terms and each breeder has their own idea of where the lines are drawn. Highly incestuous matings such as father or mother to their own progeny, or brother to sister etc are considered by most breeders to be 'inbreeding' whilst others will consider less incestuous matings such as bringing a grandparent back into a line to be line breeding.

Line breeding can be a valuable tool in the hands of a thoroughly experienced breeder who is familiar with the health status debits and credits behind their breeding stock, but in less knowledgable hands can be a recipe for disaster.

Inbreeding co-efficients of up to 30% are considered low in 'pure' breeds. Rutland Manor breeds using an inbreeding co-efficient of less than 10% with most in the range of 0.5% to 3%.

During the development of the Australian Labradoodle, and following diligent research, several other breeds were thoughtfully infused at specifically appropriate times by the Founders, pursuit of the wide and diverse gene pool necessary to build a foundation of robust health in the ASD (Australian Service Dog) Australian Labradoodle, yet at the same time, not sacrificing the standards of soundness, temperament and coat type which had already been achieved.


And this website about Sire genes/ what sires bring to the mix
http://lowchensaustralia.com/breeding/maternalgs.htm
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Lucky Me
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PostPosted: Wed Mar 12, 2008 10:58 am    Post subject: Reply with quote

I find it interesting how, when you look at a dog's 6 generation pedigree (AKC), most times there is at least close breeding within it, alot of times, 3 or 4.
So, when you say a dog has say...15 Champions in it's background. How many times do you count it? Only once or for the amount of slots it occupies in the pedigree? Confused
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Doodlesville
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PostPosted: Wed Mar 12, 2008 1:14 pm    Post subject: Reply with quote

ALL i can say about this thread and some comments is YIKERS

if they cant find unrelated studs thats because there has been such linebreeding and inbreeding thus far ,,which in my 20 + yrs of breeding dogs has always been frowned upon!!

you can always find someone that approves of certain practices ,
that doesnt make it right, nor healthly for any breed or people for that matter

The Labradoodle is a new enough breed that line breeding or inbreeding should NEVER even be considered IMHO
All it does is breed in the negative health in any breed
that practice is done in alot of AKC show dog breeds, why to make the perfect LOOKING dog, for the show ring,
is that truly what our main goal is for the doodle breeds is ?
i know in my program, its for healthy well adjusted dogs for families,service or therapy dogs
im afraid that some breeders have lost sight of the main goal for breeding doodles in the first place

Ok sorry im offa my soap box , but i just couldnt not post to this thread Confused Shocked Rolling Eyes Smile
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Napathedoodle
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PostPosted: Wed Mar 12, 2008 1:46 pm    Post subject: Reply with quote

It's not line breeding and inbreeding that's the problem. They're trying to avoid that. The problem is that some sires and dams were produced that held all the traits that breeders were looking for, so they were used quite frequently, so many breeders are finding that they all have related lines. So, it'll be interesting to see how the breed develops in later years.
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newaustralianlab
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PostPosted: Wed Mar 12, 2008 3:34 pm    Post subject: in-breeding Reply with quote

I was reading through your posts today and am somewhat confused about all this inbreeding discussion. If a dam and sire have passed all medical tests such as hips, eyes, elbows, thyroid, etc, does it matter if there was prior in-breeding generations ago so long as healthy pups are regularly produced? I'm getting ready to put down a deposit for one of Hudson Labradoodles pups owned by Curtis Rist. He's the founder of the Australian Labradoodle Protection Society which seems to be endorsed by the original founders of the breed - tp and rm. I would love to receive a PM if anyone is aware of any problems with any of his pups previously sold.

I think breeders who are board members of the American Labradoodle Association of America as well as the ALAA are not allowed to be members of tp, rm, or Curtis Rist's association due to differences in breeding practices. Do I, as a buyer, need to be concerned about this? Is he considered a breeder of "in-bred pups?

I understand there are breeders who are familiar with dogs surrendered to a kill shelter from TP which may be a reason for the some of the friction between associations. In the meantime, there are breeders who are listed on the TP and RM website who are also members of the Amer. Lab. Assoc. of America and the ALAA.

How can Curtis and other Australian doodle breeders still be selling pups for $2,500 if it resulted in "damaged" pups from in-breeding? Would this info. be available to the public? He seems to be very well respected from the research I've done. Why would he spend time and money breeding his in-bred sires and dames if it resulted in problems with his pups. He certainly comes across as a responsible breeder.

If I bought a pup that did develop medical problems, does any association really protect me or help me in any way? I don't think they are liable for anything even though the websites state that medical testing is done in order to be members. I think one has to rely on the breeder. Some associations have great websites but do they offer the buyer any protection? After reading the problems expereinced by Napa the doodle, I'm almost convinced I have to get lucky that my pup will be healthy.

Feedback is very much appreciated.
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Lucky Me
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PostPosted: Wed Mar 12, 2008 3:36 pm    Post subject: Reply with quote

Just for the record Nancy....I don't agree with it! I was just stating facts, things I have observed in my years of breeding. When I worked in a grooming shop,the lady had 10 studs and 20 bitches. I watched alot of things going on that I didn't agrree with, and I also saw the results. I would not do it!
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Doodlesville
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PostPosted: Wed Mar 12, 2008 3:49 pm    Post subject: Reply with quote

Glad to hear it judi,,I have been in the dog industry to some degree for over 30yrs, linebreeding and inbreeding is a train wreck waiting to happen no matter how many marshmellows folks put on top of it to make it sound right

I havent heard of Curtis i dont think, but you are correct about Tp/Rm dogs being dumped at a kill shelter, did he get these dogs from that fiasco/? and now he is breeding them? if i read that correctly,, Im not sure, if i did or not, if that is the case that should tell you something rite there, if i didnt read that right ,,then disreguard that comment
also you might want to be aware that Aust labradoodles have so much poodle infused in them that they at last count could potentially be 15/16ths poodle ,,recently (in last year) it has been admitted that they infused Terriers and Spaniels in the mix,
the reason labradoodles were started in the first place was to breed allergy friendly service and therapy dogs, that were outcrosses Lab to poodle to create healthy dogs (HYBRID VIGOR) continuly infusing poodle in the breed actually take away the hybrid vigor everytime its done,

infusing other breeds such as spaniels and terriers ,which brings in other health concerns into the mix wont help to keep doodles healthy,,,
We all do what we can do as far as testing, but genetics is another thing
just my take on this Smile
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Aussiedoodles, Goldendoodles &
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Keeping the Original Goals for this breed First!!
We do NOT Breed Australian Labradoodles!!
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Lucky Me
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PostPosted: Wed Mar 12, 2008 3:49 pm    Post subject: Reply with quote

NewAustralianLab....
I will admit that I found out after the fact, that my dog had a Father/Daughter breeding in the background. Thank goodness the poodle was bred to a lab & thank-goodness she tested good genetically with DNA. In researching poodle backgrounds, I noticed over and over again that there was alot of this, most of the time it was with the ,champion dogs.
One thing you could do that could ease your mind abit, would be to have your dog DNA'd. It's only $49 and test 29 genetic diseases.
http://www.pawsitiveid.net/dnaresults.htm
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sessa35
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PostPosted: Wed Mar 12, 2008 4:42 pm    Post subject: Re: in-breeding Reply with quote

newaustralianlab wrote:
After reading the problems expereinced by Napa the doodle, I'm almost convinced I have to get lucky that my pup will be healthy.


I'm not a breeder and I'm certainly the first to say that I should NOT be commenting on anything regarding science or genetics...LOL!! Wink Laughing

BUT...

I just wanted to reply to this----NO NO NO....I sincerely feel you do NOT have to be "lucky" to get a healthy pup...it sounds as if your research and your expressed concerns has already helped to guide you in your decision process---don't doubt your instincts!!

MAY YOUR PUP BE HEALTHY, LIVELY, AND EVERYTHING YOU WANT HIM/HER TO BE!

CHEERS!! Very Happy Very Happy Very Happy Very Happy
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