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“Maxie”
Maxum Mogul

French Bulldog

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“First frenchie I ever met whose not a foodie!”

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American Kennel Club (AKC):

Genetic Breed Result

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French Bulldog

French Bulldogs, affectionately known by their many fans as Frenchies, are an immensely popular and well-known breed of dog. As their name implies, they are native to France and are the result of a mix between English Bulldogs and local dogs in Paris. They are very popular around the world, earning their place as the 4th most popular dog in the United Kingdom and the 9th most popular dog in the United States.

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Changes to this dog’s profile
  • On 4/18/2018 changed name from "French Bulldog" to "Maxim Mogul"
  • On 7/22/2018 changed name from "Maxim Mogul" to "Maxum Mogul"

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Health Summary

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Maxie is at increased risk for one genetic health condition.

Intervertebral Disc Disease (Type I)

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Maxie inherited both copies of the variant we tested

How to interpret this result

Maxie has two copies of an FGF4 retrogene on chromosome 12. In some breeds such as Beagles, Cocker Spaniels, and Dachshunds (among others) this variant is found in nearly all dogs. While those breeds are known to have an elevated risk of IVDD, many dogs in those breeds never develop IVDD. For mixed breed dogs and purebreds of other breeds where this variant is not as common, risk for Type I IVDD is greater for individuals with this variant than for similar dogs.

What is Intervertebral Disc Disease (Type I)?

Type I Intervertebral Disc Disease (IVDD) is a back/spine issue that refers to a health condition affecting the discs that act as cushions between vertebrae. With Type I IVDD, affected dogs can have a disc event where it ruptures or herniates towards the spinal cord. This pressure on the spinal cord causes neurologic signs which can range from a wobbly gait to impairment of movement. Chondrodystrophy (CDDY) refers to the relative proportion between a dog’s legs and body, wherein the legs are shorter and the body longer. There are multiple different variants that can cause a markedly chondrodystrophic appearance as observed in Dachshunds and Corgis. However, this particular variant is the only one known to also increase the risk for IVDD.

Breed-Relevant Genetic Conditions

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Progressive Retinal Atrophy, crd4/cord1 (RPGRIP1)

Identified in French Bulldogs

Canine Multifocal Retinopathy, cmr1 (BEST1 Exon 2)

Identified in French Bulldogs

Hereditary Cataracts (HSF4 Exon 9, Boston Terrier Variant)

Identified in French Bulldogs

Urate Kidney & Bladder Stones (SLC2A9)

Identified in French Bulldogs

Additional Genetic Conditions

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Clinical Tools

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Through Maxie’s mitochondrial DNA we can trace his mother’s ancestry back to where dogs and people first became friends. This map helps you visualize the routes that his ancestors took to your home. Their story is described below the map.

Haplogroup

A1e

Haplotype

A2b

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A1e

Maxum Mogul’s Haplogroup

This female lineage likely stems from some of the original Central Asian wolves that were domesticated into modern dogs starting about 15,000 years ago. It seemed to be a fairly rare dog line for most of dog history until the past 300 years, when the lineage seemed to “explode” out and spread quickly. What really separates this group from the pack is its presence in Alaskan village dogs and Samoyeds. It is possible that this was an indigenous lineage brought to the Americas from Siberia when people were first starting to make that trip themselves! We see this lineage pop up in overwhelming numbers of Irish Wolfhounds, and it also occurs frequently in popular large breeds like Bernese Mountain Dogs, Saint Bernards and Great Danes. Shetland Sheepdogs are also common members of this maternal line, and we see it a lot in Boxers, too. Though it may be all mixed up with European dogs thanks to recent breeding events, its origins in the Americas makes it a very exciting lineage for sure!

A2b

Maxum Mogul’s Haplotype

Part of the large A1e haplogroup, this haplotype occurs most commonly in French Bulldogs. It’s a rare find!

Some other Embark dogs with this haplotype:

Irish Wolfhounds are a consistent carrier of A1e.

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Through Maxie’s Y-chromosome we can trace his father’s ancestry back to where dogs and people first became friends. This map helps you visualize the routes that his ancestors took to your home. Their story is described below the map.

Haplogroup

D

Haplotype

H7

Map

D

Maxum Mogul’s Haplogroup

The D paternal lineage is very common in well-known populations of dogs. Breeds belonging to the D lineage likely have direct male ancestors that can be traced all the way back to the origin of domestic dogs themselves! One popular breed that commonly sports a D lineage is the Boxer. Boxers were developed in the late 19th century from Mastiff dogs, so it is no surprise that D is well represented among Mastiffs, Bulldogs, as well as Terriers. Intriguingly, D is also found among Lhasa Apsos, an ancient Tibetan breed, and Afghan Hounds. While the presence of this lineage in Polynesia or the New World can be chalked up to interbreeding with European dogs brought during voyages of discovery or later settlement, D is also well represented among village dog populations in the Middle East and Africa. If the fact that we find dogs bearing a D lineage in the Middle East (not to mention the large amount of diversity among Middle Eastern D lineage males) is any indication of ancient residence in that region, then the presence among Oceanian village dogs is peculiar. Rather, it may be that D is part of a broader Eurasian group of ancient paternal lineages which disappeared from the eastern portion of its original range, persisting in the island of New Guinea as well as West Asia and Africa. With the rise of Mastiff breeds, the D lineage received a new life as it became common among many types of working dogs.

H7

Maxum Mogul’s Haplotype

Part of the D haplogroup, this common haplotype has been found in French Bulldogs, Afghan Hounds, Bull Terriers, and village dogs spanning from South America to Africa and into the South Pacific.

Some other Embark dogs with this haplotype:

The D paternal lineage is common in Boxers.

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