Korthals Griffon coat colour anomaly explained

The Korthals Griffon is a versatile and highly prized hunting breed, known for its distinctive rough coat and excellent field abilities. Beyond hunting, they have become beloved family pets due to their athletic, well-balanced frame and attractive traditional coat colours. However, a particular coat colour anomaly affecting some pedigree lines has raised concern among breeders and enthusiasts alike. This anomaly involves the appearance of a yellow or tan coat pattern, known as "tan point," which is not part of the breed's original standard as established in Germany and is not accepted by the UK Kennel Club.

1. Understanding the Yellow/Tan Coat Anomaly

In certain pedigree Korthals Griffons, a yellow or tan coat colour anomaly has been documented. This "tan point" colouring shows as yellowish or tan markings and is clearly distinct from the breed's original markings, which are typically steel grey interspersed with liver brown and occasional white hairs. Such a coat colour does not align with breed standards and is therefore considered a fault. While the reasons for its appearance remain somewhat unclear, genetic testing has shed light on the cause.

2. The Role of Genetic Testing: K-Locus DNA Test

Fortunately, breeders now have access to the K-Locus Colour of Coat DNA test that can accurately identify whether a Korthals Griffon carries the yellow/tan gene anomaly. This test detects the presence of the "y" allele linked to tan point colouring. It is a simple, painless test performed on a DNA sample and is highly reliable in revealing a dog's genetic status regarding coat colour.

3. Interpreting DNA Test Results

Test results fall into three categories:

• KB/KB: The dog does not carry the yellow/tan gene and will not produce offspring with the coat anomaly.
• KB/ky: The dog is a carrier of the yellow/tan gene but may not express the colour itself. However, it can pass the gene to puppies.
• ky/ky: The dog carries and usually expresses the tan point colouring, and will likely pass this to its offspring.

Ideally, breeding stock should be KB/KB, which maintains the breed's traditional appearance and prevents perpetuation of the anomaly.

4. Responsible Breeding Practices

Reputable Korthals Griffon breeders actively use the K-Locus DNA testing in their breeding programmes. They select only KB/KB tested sires and dams for pairing to avoid passing on the yellow/tan gene. Dogs that test positive as carriers or express the anomaly should not be bred to uphold breed standards and to protect the integrity of this rare breed.

5. The Importance of DNA Test Transparency for Buyers

For prospective owners considering a Korthals Griffon puppy, it is important to request the breeder’s DNA test results for the coat colour gene. This ensures that the puppy will adhere to the breed standard. Additionally, breeders who import dogs or genetic material from abroad should verify that these dogs have undergone proper testing and are free from the yellow/tan gene anomaly.

6. Why Maintaining Breed Standards Matters

The Korthals Griffon’s traditional coat colours and markings are tied to its history and function as a skilled hunting dog. Preserving these standards helps maintain the breed’s character and working abilities. Controlling genetic anomalies like the yellow/tan coat through responsible breeding protects the breed's health and heritage, especially important given the limited gene pool in the UK.

In summary, the Korthals Griffon coat colour anomaly is a genetic variation easily detected by DNA testing. Responsible breeders who understand and utilise this tool play a critical role in keeping this beautiful breed true to its original standards for future generations.

What is a K-Locus DNA test for Korthals Griffon coat colour?

Quick Answer: The K-Locus DNA test identifies whether a Korthals Griffon carries the genetic variant responsible for the yellow/tan "tan point" coat anomaly, helping breeders make informed decisions to maintain breed standards.

This genetic test focuses on the K-Locus gene, which influences coat colour patterning. In Korthals Griffons, the dominant KB allele suppresses the tan point pattern, while the recessive ky allele allows it to appear. The test shows if a dog is homozygous normal (KB/KB), a carrier (KB/ky), or expresses the anomaly (ky/ky). It is critical for breeders to use this information to avoid breeding dogs that could produce tan point puppies, preserving the traditional coat colours recognized in the breed standard.

How to buy a Korthals Griffon puppy free from the yellow/tan gene anomaly

Quick Answer: Prospective buyers should seek reputable breeders who provide K-Locus DNA test results confirming puppies and parents are KB/KB, ensuring no carriage of the yellow/tan anomaly and adherence to breed standards.

When looking to buy a Korthals Griffon puppy, it is essential to ask to see documented DNA test results for both the puppy’s parents and the puppy itself if available. Choose breeders who are transparent about their testing practices and breeding choices prioritising health and breed integrity. This prevents inadvertently purchasing a puppy that carries or expresses the tan point anomaly. Responsible breeders also educate buyers on the anomaly and its implications so you can make an informed decision to support preserved breed standards.

By combining knowledge, careful selection, and genetic testing, both breeders and owners contribute to the preservation and health of the Korthals Griffon, a truly special breed.