But there are health problems associated with the merle mutation and the risk of these problems occurring increases when two
merle coated dogs are mated together.
It is known that
merle coated dogs have a slightly increased risk of hearing problems, possibly due to the Silv gene.
As long as there are
merle coated dogs, double merles will be produced, usually by accident or through ignorance on the part of the breeder.
In this article I will share the breeds that can carry the merle coat accompanied by beautiful pictures of
these merle coated dogs.
Not exact matches
The gene that cause
merle coats in
dogs can also affect eye color, such as causing ice blue eyes, and can also effect skin pigment.
Border Collies, classically working
dogs, known for their high intelligence can come in a
Merle coat pattern.
When
dogs with merle coats are bred together, also known as merle - to - merle breeding, it can result in what is called a «double merle,» according to Deaf Dogs Rock, an organization that finds homes for deaf d
dogs with
merle coats are bred together, also known as
merle - to -
merle breeding, it can result in what is called a «double
merle,» according to Deaf
Dogs Rock, an organization that finds homes for deaf d
Dogs Rock, an organization that finds homes for deaf
dogsdogs.
Dogs with predominantly white or
merle coats may be at increased risk for congenital deafness.
The United Kingdom Kennel Club decided in May 2007 not to register puppies with «
Merle coat color in dogs» coloration due to the health risks associated with the gene responsible, and in December of that year formally amended the Breed Standard to say «Any color or mixture of colors but never merle (dapple).&r
Merle coat color in
dogs» coloration due to the health risks associated with the gene responsible, and in December of that year formally amended the Breed Standard to say «Any color or mixture of colors but never
merle (dapple).&r
merle (dapple).»
The defects appear to be linked to the dominant
merle gene, since severely affected
dogs are homozygous
merles and often have excessive white in their
coats.
Other
dogs will be lightly merled, where their
coat is mostly black, with small areas of
merle.
Merle dogs have a solid - color
coat, which is usually black, broken up with irregular patches of another color, such as blue, red, and chocolate.
The
merle pattern can occur in
dogs of all
coat colors.
The word
Merle refers to a pattern in a
dog's
coat, which may include different colors.
Merle Great Danes are often produced when breeding for harlequin -
coat Great Danes,
dogs that have black spots on white fur.
A good example of a
dog with a
merle coat is the blue
merle Border Collie.
A
merle Great Dane is a
dog of the Great Dane breed that has a mottled
coat consisting of a gray or light - cream background and small black spots.
Although the genetics for
merle are associated with the genetics for harlequin patterned
dogs, harlequin is a recognized
coat pattern for the breed, while
merle is not.
The problematic traits include viciousness or aggressiveness toward humans, extreme shyness, deafness, a long and / or
merle coat, albinism, a screw tail, dwarfism and any other disproportionate physical characteristic that interferes with the
dog's ability to work or perform.
(The eye anomaly «
merle» can be confused with choroidal hypoplasia, primarily in
dogs from
merle to
merle breeding and whose
coat color is whiter than their littermates.
In the past, a double
merle Catahoula, which has been phenotypically identified by many breeders as a
dog displaying more than a 70 % white
coat color, may actually have a full colored
coat.
Dark colored
dogs may display their
merle coat variance when sunlight is shining on them.
To avoid producing «double
merle» (M / M) puppies,
dogs with a copy of M (particularly those with M alleles near the size which is likely to produce the classic
merle coat color / pattern) should only be bred to
dogs that do not have a copy of the M allele.
The M Locus (
Merle) coat color test reliably determines if a dog carries the M (merle insertion variant) Allele of the PMEL
Merle)
coat color test reliably determines if a
dog carries the M (
merle insertion variant) Allele of the PMEL
merle insertion variant) Allele of the PMEL gene.
Merle is inherited in a dominant fashion, meaning that only one copy of an M allele is necessary for a dog to display some variation of the merle coat color / pattern, which is marked by random dilution of eumelanin (black pigment) leaving patches of normal coat color within areas of diluted pigmenta
Merle is inherited in a dominant fashion, meaning that only one copy of an M allele is necessary for a
dog to display some variation of the
merle coat color / pattern, which is marked by random dilution of eumelanin (black pigment) leaving patches of normal coat color within areas of diluted pigmenta
merle coat color / pattern, which is marked by random dilution of eumelanin (black pigment) leaving patches of normal
coat color within areas of diluted pigmentation.
Merle:
Coat pattern seen on many breeds of dogs that mixes white with the predominant coat color to form spots throughout the body of the
Coat pattern seen on many breeds of
dogs that mixes white with the predominant
coat color to form spots throughout the body of the
coat color to form spots throughout the body of the
dog.
A
dog with one copy of H but two copies of M (double
merle) has a
coat color that can be indistinguishable from a
dog without the harlequin variant.
Sometimes
dogs may appear to have normal
coat colouring but are in fact
merles and will produce puppies with the
merle colouration.
In a wider context, such breeding brings the ethics of all
dog breeders into question and casts a pall over the show
dog world, as there is a perception that show
dog breeders are the worst offenders for producing double
merles as they are striving for the perfect
merle coat pattern.
The
merle coat pattern is popular because it is unusual and very unique, with each
merle dog having a different
coat pattern.
Although you will find descriptions of blue
merle as «mixed black and white hairs,» looking closely at a merled
dog's
coat will show that statement to be inaccurate.
A
dog with a
merle coat is characterised by having patches of hair with diluted pigment (colour).
If two
dogs with the dominant
merle genes bred together, there's a 25 % chance that the pups will have a double
merle gene, which creates an extreme lightening of the
coat and often deafness and eye defects.
There is no such thing as a «blue
merle» or «red
merle»
coat coloration in Cattle
Dogs.
The double
merle genetic defect can be found in the Australian Shepherd, Great Dane, the Dachsund, the Sheltie, the Collie — any
dog with the
merle or dapple
coat.
For instance, deafness is linked to white and
merle coats in both
dogs and cats.
The
Merle gene is responsible for a wide variety of beautiful
coat and iris colors in the
dog.
The eye color should fit the
coat color, but a blue eye in anything but a blue
merle colored
dog is a disqualifying feature.
Dogs with
merle coats often have one or two blue eyes as well.