Originally Posted by chachi (Post 4249777)

I understand everything except the piebald gene explanation. How do you explain how the parti yorkie got the piebald gene also and why are they considered yorkies if biewers arent

Originally Posted by pstinard (Post 4249795)

Oh dear, I don't want to create more controversy, but I think that Parti-Yorkies got their piebald gene in the same way that Biewers did--by crossing in from another breed. BUT, I have read absolutely nothing about DNA breed testing of Parti Yorkies, so I don't have as much data to go on as I do for Biewers--the evidence is much more clear in Biewers. It would be great to sequence the MITF (piebald) gene in Parti Yorkies too, just to try to get an idea of what is going on. I am willing to keep an open mind. We simply need more data.

Originally Posted by GreenwoodBiewer (Post 4249782)

Well.. that is your opinion and you are of course free to have it. And, based on the knowledge you have been able to gather I can see where you could come to that conclusion.

How do you account however for the exact same gene being in the Parti Yorkshire Terrier (in the states).. actually being documented prior to Heir Biewers pup? The yorkies in the states are producing and have produced the same Piebald gene without being bred with the Biewer or any other "mixes".. they have been DNA'd to be pure Yorkshire Terrier by the AKC. Generations of yorkies have been tested by a reputable lab for DNA parentage from a very well know yorkie breeder.

Now, if this can happen in the States with full pure bred yorkies, why does it have to be a different story with the German yorkies? Do you not think that if what the MARS lab said was really in the makeup of these Biewers (they only go back three generations) We would see some throw backs to some of the these dogs??

You stated in one of your posts that you believed that breeding back to the yorkie was a recent event.. far from it. What is recent is NOT breeding back to the yorkie. It is only within the last few years that people have decided NOT to breed back to yorkies and breed Biewer to Biewer only. (One club here in the states has always stated Biewer to Biewer only) In Germany, the country of origin, they have always bred back to yorkies, many breeders still do. Within one litter you have both yorkies and Biewers and they are registered by color into what breed they are. You can also have GoldDust and many other "colors" that are considered separate BREEDS! ooh so simple! But my point is breeding back to the yorkie is NOT a new thing at all, it was ALWAYS done, it had to be, and in my opinion it still should be.

Now, back to the MARS test.. IF the test had used a cross section of Biewers to get the markers against which all of the dogs were to be measured maybe the testing would have some validity.. However,. this was not the case. The dogs used to create the marker were from one group of people, one specific group of dogs. The samples were "submitted" by someone claiming to be a vet (who was not). Tainted test, tainted results FOREVER! Unless and until they totally start over collecting the information to get a good base.. that test is meaningless. MARS themselves have stated over and over again that this test, if taken for dogs from small populations and animals or dogs not bred in the US is note accurate.. if you look in the YT archives , I'm sure you'll find the letter from the MARS people stating such.

OK.. there, My opinion and a few questions too I guess :) .. always more questions than answers!

Diana:animal-pa

Originally Posted by pstinard (Post 4249816)

About Biewer to Yorkie breeding, once that is stopped, and you start breeding Biewer to Biewer, the gene pool becomes fixed and the breed stops becoming more and more Yorkie-like. That would explain the MARS results showing that the Biewers they tested were in a unique and uniform group.

About the Biewers that were tested by MARS, yes those mostly came from one club. I don't know whether the person who submitted the DNA samples claimed to be a vet or not, but it doesn't matter, because DNA doesn't lie. If someone has serious issues about the validity of the samples, they should ask for them to be retaken and retested, but I'm sure the results would be the same. I agree that it would be great to test all Biewers from all clubs, but since that might include Biewers coming from Biewer by Yorkie crosses, that would basically be like throwing mixed breed dogs into a purebred test--the results would be interesting, but they wouldn't be informative or normative. I understand that there is some kind of turf war going on with respect to which clubs have the "true and authentic Biewers." I would recommend that all of the clubs doing Biewer by Biewer matings get together, submit their dogs' DNA for analysis, go over the results together, and try to reach some kind of consensus.

Originally Posted by pstinard (Post 4249823)

Oh, I forgot to mention that if you are getting a lot of different colored "Yorkies" (and I use the term loosely) from ONE litter, that is clearly a sign that breed standards for the Yorkshire Terrier are being ignored and flaunted, and people have been crossing Dog knows who to Dog knows what. Each color is not a separate breed--it's a sign of breeders gone wild.

Originally Posted by pstinard (Post 4249816)

Hi Diana, I appreciate the controversies surrounding this issue--they are very complex indeed. I answered the Parti question in another post. But if Partis are testing as purebred Yorkshire Terriers, one explanation could be that they have been crossed for so many generations back to Yorkshire Terriers that traces of other breeds are being diluted out by Yorkie DNA. That's one possibility. Since I haven't seen any Parti test results with my own eyes, and since Partis have not been subjected to as much analysis by MARS as Biewers, I don't have enough information to draw any firm conclusions. Sequencing the MITF gene in Partis would help a lot in answering this question. With respect to AKC DNA testing, they only do parentage testing, not breed purity testing, and I'm certain that their parentage testing does not predate the appearance of the first Parti Yorkies. If you have any information to the contrary, let me know!

You have a good point about German Yorkies, but my understanding is that pedigree records for them is not as good as in the United States. And again, there was no DNA testing back in the days of Mr. Biewer.

About Biewer to Yorkie breeding, once that is stopped, and you start breeding Biewer to Biewer, the gene pool becomes fixed and the breed stops becoming more and more Yorkie-like. That would explain the MARS results showing that the Biewers they tested were in a unique and uniform group.

About the Biewers that were tested by MARS, yes those mostly came from one club. I don't know whether the person who submitted the DNA samples claimed to be a vet or not, but it doesn't matter, because DNA doesn't lie. If someone has serious issues about the validity of the samples, they should ask for them to be retaken and retested, but I'm sure the results would be the same. I agree that it would be great to test all Biewers from all clubs, but since that might include Biewers coming from Biewer by Yorkie crosses, that would basically be like throwing mixed breed dogs into a purebred test--the results would be interesting, but they wouldn't be informative or normative. I understand that there is some kind of turf war going on with respect to which clubs have the "true and authentic Biewers." I would recommend that all of the clubs doing Biewer by Biewer matings get together, submit their dogs' DNA for analysis, go over the results together, and try to reach some kind of consensus.

Originally Posted by luvlee (Post 4249815)

Ahhh, you're in the THICK of it all right!!:D

Originally Posted by luvlee (Post 4249815)

Someone also mentioned potential mix with s**tzu or Maltese. I don't remember which one that Mr. Biewer also bred - it was one of those 2.

Someone else also mentioned a re-do of the testing since the 100 samples originally submitted by G.Pruett & company may be tainted. That would be the right thing to do. Certainly there are enough Biewers to test.

Perhaps people are too afraid to do that now. Maybe breeders don't want to know the complete & messy history as it relates to their lines.

In any event, it's my opinion that there's been sufficient breedings of the Biewer for it to be considered a distinct breed. IMHO, there's no reason to breed back to the Yorkie. It doesn't bother me in the least that some other breed was mixed in early on to create the Biewer.

Don't all dogs descend from wolves anyway? At some point, all breeds were mixed with something else - save the dogs that were created in the Book of Genesis (I guess they just popped up out of nowhere after there was light & earth.:rolleyes:)

Tracey

Originally Posted by GreenwoodBiewer (Post 4249830)

There is no turf war.. all of the Biewers came from the place.. they are all the same dogs.

Here is the history of the Parti DNA testing as taken from Deb Mullins site:

snowblueyorkies.com

The Tri- color had been showing up in litters from Ashley since 1984 and Nikkos Kennel had been quietly placing them in pet homes and asking people not to say where they got them.
Crownridge and Summit had obtained Parti colored puppies from Nikkos kennels and wanted them AKC registered with their true parti-colors . So in 1999 they convinced Nikkos Kennel to go to AKC and get them registered as yorkshire terriers parti color.

This turned out to be a very lengthy and costly process to Mrs. Lipman,(Nikko's Kennels) as AKC shut down her kennel in 1999 for 18 months to conduct DNA studies of 42 litters sires and dams. She was not allowed to breed or sell or conduct any business during this time.

3 of the dogs tested were owned by Mrs Bogren(Crownridge) and 1 owned by Mrs Gesmundo(Summit Yorkies)

During this study AKC also spoke to several other breeders about tri colored pups born in other bloodlines.

Many highly respected breeders admitted they occasionally had these tri colored pups born.

AKC went back as far as they could with the living dogs. They DNA'd about 42 litters. They also talked to a lot of the "old" breeders and they told them they had always been in the lines but were disposed of.

In June of 2000. The DNA studies of Nikko’s Kennel was completed to the satisfaction of AKC.

AKC deciding that after a study of the Yorkshire History and the DNA of the dogs involved in the study they were satisfied that the color can be produced in otherwise normal litters of Yorkshire Terriers.


Hope that helps you..

Diana :animal-pa

Originally Posted by luvlee (Post 4249829)

The demise of the Yorkshire Terrier! It's not just color; some of them don't even structurally LOOK like the standard any more. It's a travesty.

Originally Posted by GreenwoodBiewer (Post 4249830)

There is no turf war.. all of the Biewers came from the place.. they are all the same dogs.

Here is the history of the Parti DNA testing as taken from Deb Mullins site:

snowblueyorkies.com

The Tri- color had been showing up in litters from Ashley since 1984 and Nikkos Kennel had been quietly placing them in pet homes and asking people not to say where they got them.
Crownridge and Summit had obtained Parti colored puppies from Nikkos kennels and wanted them AKC registered with their true parti-colors . So in 1999 they convinced Nikkos Kennel to go to AKC and get them registered as yorkshire terriers parti color.

This turned out to be a very lengthy and costly process to Mrs. Lipman,(Nikko's Kennels) as AKC shut down her kennel in 1999 for 18 months to conduct DNA studies of 42 litters sires and dams. She was not allowed to breed or sell or conduct any business during this time.

3 of the dogs tested were owned by Mrs Bogren(Crownridge) and 1 owned by Mrs Gesmundo(Summit Yorkies)

During this study AKC also spoke to several other breeders about tri colored pups born in other bloodlines.

Many highly respected breeders admitted they occasionally had these tri colored pups born.

AKC went back as far as they could with the living dogs. They DNA'd about 42 litters. They also talked to a lot of the "old" breeders and they told them they had always been in the lines but were disposed of.

In June of 2000. The DNA studies of Nikko’s Kennel was completed to the satisfaction of AKC.

AKC deciding that after a study of the Yorkshire History and the DNA of the dogs involved in the study they were satisfied that the color can be produced in otherwise normal litters of Yorkshire Terriers.


Hope that helps you..

Diana :animal-pa

Originally Posted by BWRTerrierFan (Post 4249877)

Here is an explanation of the Parti-Color from another Yorkie Breeder

Goldenray Genetics Party Yorkies Parti Color and Biewer Colors Genetic Studies