Let's talk about inbreeding - Page 7

Pedigree Database

 

by joanro on 12 October 2018 - 17:10

Duke: Valk, my take on dogs dying younger; kibble, medications, flea and worm treatments and so on


All my wolf/ husky hybreds lived to be 15 and 16 years old, with the exception of one, who was 8 when he bled out from liver hemangiosarcoma. That was a total of 16 dogs that lived beyond 15 years.

My Smooth Fox Terriers lived beyond 14 ....the two males were 16. My Irish Terrier was a couple months shy of 17 when she died.

These dogs all were vaccinated four times with 5 way, and every three years for rabies. All were fed kibble except about one year on raw. Flea killer was used only when they picked up fleas while we were on the road going to venues to work.

Heartworm preventative was given to every one of these dogs once a month for the life of the dogs.

Deworming for intestinal parasites every four months.

So I disagree with your reason for shortened lifespan....none of my gsd have lived past ten except my first one, who was born in 1995 and he lived to 12 and 1/2 years old.

It's the fricking INBREEDING shortening their lives!!!!

Sunsilver

by Sunsilver on 12 October 2018 - 17:10

Valk, yes I believe it is due to inbreeding. Read my post about the ASL dogs, which were all backmassed on Lance and his progeny. It was getting to be such a problem with dogs dying young that the GSDCA started the Thirteen Club, for dog who made it to 13 years or older.

Longevity IS inheritable, but if you've got a lot of genetic garbage in the gene pool, it's going to affect the lifespan.

As for performance being affected, many heart conditions are silent until the dog drops dead, as happened to Linda Shaw's dog. Other conditions can be masked/hidden by the breeder/handler. And if you think breeders are going to tell the truth about these conditions, and why their dog dropped dead at such a young age, well, I've got some waterfront property in the Gobi Desert I'd like to sell you!

For far, far too long, it's been shoot, shovel and shut up when it comes to problems in the breed!

Here's one of my favourite tales about genetic backmassing. It comes from a very reliable source, too! It's a bit long, but is bang on the money as far as what we are doing with breeding animals!

The Fable of Old Blue
by C.A. Sharp editor of the "Double Helix Network News"


THE FABLE OF OLD BLUE Consider the hypothetical case of Old Blue, Malthound extraordinaire. Blue was perfect; sound, healthy and smart. On week days he retrieved malt balls from dawn to dusk. On weekends he sparkled in malt field and obedience trials as well as conformation shows, where he baited to - you guessed it- malt balls.
Everybody had a good reason to breed to Blue, so everybody did. His descendants trotted in his paw-prints on down through their generations. Blue died full of years and full of honor. But what people didn't know was that Old Blue, good as he was, carried a few bad genes. They didn't affect him, nor the vast majority of his immediate descendants. To complicate the matter further, some of those bad genes were linked to genes for important Malthound traits.

A few Malthounds with problems started showing up. They seemed isolated, so everyone assumed it was "just one of those things". A few declared them "no big deal". Those individuals usually had affected dogs. All in all, folks carried on as usual.

Time passed. Old Blue had long since moldered in his grave. By now, everyone was having problems, from big ones like cataracts, epilepsy or thyroid disease to less specific things like poor-keepers, lack of mothering ability and short life-span. "Where can I go to get away from this?" breeders wondered. The answer was nowhere.

People became angry. "The responsible parties should be punished!" Breeders who felt their programs might be implicated stonewalled. Some quietly decided to shoot, shovel and shut-up. A few brave souls stood up and admitted their dogs had a problem and were hounded out of the breed.

The war waged on, with owners, breeders and rescue workers flinging accusations at each other. Meanwhile everybody carried on as always. After another decade or two the entire Malthound breed collapsed under the weight of its accumulated genetic debris and went extinct.

This drastic little fable is an exaggeration--but not much of one. Here's similar, though a less drastic example from real life. There once was a "Quarter Horse stallion named Impressive. The name fit. He sired many foals who also exhibited his desired traits. But when they and their descendants were bred to each other, those offspring sometimes died. Impressive had been the carrier of a lethal single-gene recessive trait. No one knew it was there until they started inbreeding on him. The situation of a single sire having this kind of drastic genetic effect on a breed became known as the "Impressive Syndrome".



Many species and breeds of domestic animals, including dogs, have suffered "impressive Syndromes" of their own. But cases like that of Impressive are only the tip of the iceberg. A single-gene recessive becomes obvious in just a few generations. But what about more complex traits?

This is not to say that those popular sires we so admire are bad breeding prospects. Their many excellent traits should be utilized, but even the best of them has genes for negative traits.

The problem is not the popular sires, but how we use them. For a century or more, inbreeding has been the name of the game. (For purposes of this article, "inbreeding" refers to the breeding of dogs related to each other and therefore includes line-breeding.) By breeding related individuals, a breeder increases his odds of producing dogs homozygous for the traits he wanted. Homozygous individuals are much more likely to produce those traits in the next generation.

When a male exhibits a number of positive traits and then proves his ability to produce those traits he may become a popular sire, one that is used by almost everyone breeding during his lifetime, and maybe beyond, thanks to frozen semen.

Since the offspring and grand-offspring and so on are good, breeders start breeding them to each other. If the results continue to be good, additional back-crosses may be made for generations. Sometimes a sire will be so heavily used that, decades hence, breeders may not even be aware of how closely bred their animals are because the dog no longer appears on their pedigrees.

This is the case in Australian Shepherds. Most show-line Aussies trace back, repeatedly, to one or both of two full brothers: Wildhagen's Dutchman of Flintridge and Fieldmaster of Flintridge. These, products of a program of inbreeding, were quality individuals and top producing sires. They are largely responsible for the over-all quality and uniformity we see in the breed ring today - a uniformity that did not exit before their birth nearly three decades ago.

Working lines have also seen prominent sires, but performance traits are far more complex, genetically and because of the significant impact of environment. They are therefore harder to fix. Performance breeders will in-breed, but are more likely to stress behavioral traits and general soundness than pedigree and conformational minutiae. The best working sires rarely become as ubiquitous as the best show-line sires. Not every popular sire becomes so because of his ability to produce quality offspring. Some have won major events or are owned by individuals with a knack for promotion. Such dogs may prove to be wash-outs once their get is old enough to evaluate. But a lot of breeders have been using the animal for the few years it takes to figure that out and the damage may already have been done.

Use of even the best popular sires, by its very nature, limits the frequency of some in the breed gene pool while simultaneously increasing the frequency of others. Since sons and grandsons of popular sires tend to become popular sires the trend continues, resulting in further decrease and even extinction of some genes while others become homozygous throughout the breed. Some of these traits will be positive, but not all of them.

The owners of Old Blue, the Malthound in the opening fable, and those who owned his most immediate descendants had no idea what was happening under their noses. They were delighted to have superior studs and even more delighted to breed them to as many good bitches as possible.

Dog breeding and promoting is an expensive proposition. One usually winds up in the hole. But owning a popular sire can change that. The situation looks like a winner for everyone--the stud owner finds his financial burden reduced while breeders far and wide get to partake of his dog's golden genes.

No one breeding dogs wants to produce sick dogs. A small minority are callous and short-sighted enough to shrug genetic problems off as the price you pay to get winners, but even they do their best to avoid letting it come to general attention. We need a total re-thinking of how we utilize stud animals. No single dog, no matter how superior, should dominate the gene pool of its breed. Owners of such sires should give serious consideration to limiting how often that dog is used, annually, through its lifetime and on into the future, if frozen semen is stored. The stud owner should also look not only at the quality of the bitches being presented, but their pedigrees. How much will the level of inbreeding be increased by a particular mating?

The bitch owner also needs to think twice about popular sires. If you breed to the stud of the moment and everyone else is doing the same, where will you go when it comes time to make an outcross?

Finally, the attitude toward genetic disease itself has to change. It must cease being everyone's dirty little secret. It must cease being a brick with which we bludgeon those with the honesty to admit it happened to them. It must become a topic of open, reasoned discussion so owner of stud and bitch alike can make informed breeding decisions. Unless breeders and owners re-think their long-term goals and how they react to hereditary problems, the situation will only get worse. ________________________________________
C.A. Sharp is the editor of the "Double Helix Network News". This article was printed with permission and may be reprinted provided it is not altered and appropriate credit is given.



by duke1965 on 12 October 2018 - 18:10

LOL joan, your ability to train a horse(which pops up in any topic) has nothing to do with anything in this topic,

and nowhere do I suggest a zebra is a horse with black and white stripes, talk about lacking logic

it must be by accident than that for example flea treatments where watered down severely after cancer etc occured more than average among the users, and all the dogs of various breeds in belgium that popped up with epileptic seizures, and all turned out to feed the same brand of food also was fake, all new cases were forwarded to university and on the questionnaire the origin of problem already popped up, manufacturer recognized the problem and changed formula


by joanro on 12 October 2018 - 18:10

You're talking about isolated and common feeding practices using the same feed, same flea poison.
So now you are talking about isolated population, rather than throughout the breed.


You talk about zebra as though the uniformity is because of inbreeding, like Percheron breed .. zebra are wild animals, not created through inbreeding ....the way you are describing them is how " Breeds" of domestic animals are created.

I suggested you try to break them to ride the same way feral horses can be broke o ride to point out that the zebra is NOT just a breed of horse as you described them to be.

If I mention training horses, it's to make a point using personal experience...same way you talk about eradicating hip dysplasia in the Bouvier by inbreeding them for many generations....it's your personal experience. I have noticed that when conversing with people, no matter the topic, they tend to interject their personal experience into the conversation to make a point...if you don't like it, you can go talk to a robot.


by duke1965 on 12 October 2018 - 18:10

im talking about proven bad influence on dogs health, by kibble and medications

and again, im not talking about zebras as type of horse, only use them as example for greater uniformity in the breed,  but can be interchanged by crocodiles, elephants or wilderbeast for all I care

 

 


by joanro on 12 October 2018 - 18:10

BTW, Duke, noone is suggesting that chemicals can't cause death or cancer.
But you made the claim earlier that the shortened lifespan of the gsd BREED, is caused by flea meds, kibble etc.....now its a specific population in Belgium!!
So you changed the premise to say that it's dogs in Belgium all using the same poison and same kibble....what they use there has no bearing on my dogs.


by joanro on 12 October 2018 - 18:10

Duke: and again, im not talking about zebras as type of horse, only use them as example for greater uniformity in the breed, but can be interchanged by crocodiles, elephants or wilderbeast for all I care

 

Me: But those are ***** SPECIES ****** not a breed!

The domestic dog covers every conceivable BREED under Canis Familiaris....there is zero uniformity of the SPECIES Canis Familiaris between breeds !!!!

The Schipperke has zero uniformity with the Greyhound and they are of the same SPECIES!

There are three subspecies ( you can call them BREEDS to help you understand) of zebra.....but there is still uniformity, compared to lack of uniformity between dog breeds.

 

An image

Plains zebra

An image

Grevy's zebra

An image

Mountain zebra

 


Rik

by Rik on 12 October 2018 - 19:10

geez, zebra are equine, which I can understand is the point duke is making sitting here on a dirt road in the illiterate deep south.

anyway this topic could drift back to GSD. where is that dang button.

jmo,
Rik

by duke1965 on 12 October 2018 - 19:10

joan, I wrote about a PROVEN situation in Belgium where dogfood caused epileptic seizures in multiple breeds, and proven watering down of flea medication because of side effects

and get of your high horse LOLOLOLOL about zebras, I only mentioned them for their looks


Sunsilver

by Sunsilver on 12 October 2018 - 19:10

Pst, Rik, you just posted in the American Pit Bull Terrier forum, where this discussion has been taking place for the last 7 pages!

We're a bit far away from the GSD right now...in a number of ways!Teeth Smile






 


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