Faith, our American Chow Crested :)

Faith, our American Chow Crested :)

We got Faith’s dna results a couple of weeks ago and were sure there had to be some mistake as everyone said she was either mostly Border Collie or German Shepherd or a mix of the two.

I emailed Wisdom (the dna company) and questioned whether there was a mix-up or some other kind of error and they referred Faith’s results to their review team. And just today I got an extremely thorough and complete email from one of their vets with a very detailed explanation of her family tree, dna and traits. There were even these three PCA (Principal Component Analysis) plots showing her dna compared to a BC and a GSD (no match) and AmStaffs (undeniable match).

One of the other things she included was a link to this very informative infographic.

So… there she is in all her glory… an American (Staff- 37.5%) Chow (Chow- 25%) (Chinese- 12.5%) Crested ðŸ™‚

And we love her.

—<(0)>—

Update- It has been pointed out to me that the PCA plots are a little difficult to grasp- from the email we got…

“For your interest, I have graphed Faith’s genetic signature against known purebred German Shepherd Dogs and purebred Border Collies as represented in our database. Faith’s genetic signature is represented by a dark blue hollow dot, labeled with her sample ID number, and is graphed against a group of known purebred German Shepherd Dogs, as well as a control group of “All Breeds.” This is repeated in another PCA plot for Border Collies.

In PCA plots, her data are represented in a spatial relationship with other dogs; the more similar her signature is to a group, the more closely it will cluster with that group. As you can see, her signature shows no significant similarity to the Border Collies or German Shepherd Dogs in our database as it is clustering with the control group in both plots, suggesting recent Border Collie or German Shepherd Dog ancestry is unlikely for her. These findings suggest that she may resemble a Border Collie or German Shepherd Dog because of traits she displays in common with the breed, but has actually inherited from other breeds.

In a third PCA plot, I have graphed Faith’s genetic signature against the American Staffordshire Terrier subtypes as represented in our database. Her genetic signature is again represented by a dark blue hollow dot, labeled with her sample ID number, and is graphed against a group of known purebred American Staffordshire Terriers, as well as a control group of “All Breeds.” As stated above, her data are represented in a spatial relationship with other dogs and the more similar her signature is to a group, the more closely it will cluster with that group. In this case, you can see that her genetic signature has pulled out of the control group cluster and is moving toward the American Staffordshire Terrier subtype clusters. The genetic signature of a dog that is half American Staffordshire Terrier (or has 4 American Staffordshire Terrier great-grandparents) would graph half way between the American Staffordshire Terrier subtype clusters and the control group cluster. With three American Staffordshire Terrier great-grandparents, Faith’s genetic signature is graphing approximately ¾ of the way to the half-way mark between the two clusters. This finding demonstrates that although she may display traits that do not closely resemble those of a purebred American Staffordshire Terrier, she has in fact inherited approximately 37.5% of her DNA from American Staffordshire Terrier ancestors. As discussed above in the details of each individual trait, her physical appearance, however, is a combination of all the various genes she has inherited from all the different breeds in her complete ancestry.”


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