Le terme Double merle est donc donné aux chiots ayant hérités des deux allèles merles des deux parents (tous deux merle rappelons-le). They are highly active and hard-working, loyal, athletic, and intelligent. Year old double merle Aussie Border Collie mix rescued in Georgia when she was a young puppy. As you can see, there is no risk of double merles when breeding a solid dog to a merle. It has the same incredible work ethic, intelligence, and energy as any other colored Border Collie. One copy of the merle gene causes a marbling effect on the coat and creates lighter spots throughout the solid color coat. of it - any dog with one M gene will be a merle. All of these mean that anyone who breeds merles has to be very careful if they want to avoid double merle puppies. Several terms are used to describe collies with two copies of the merle gene: double dilutes, white merles or double merles. Let's quickly have a look at some Punnet squares again to see how merle breeding works. Merle puppies are circled in blue and double merles are circled in red. The term "double merle" refers to a dog bred by two merle colored parents. On average, that’s a quarter of the litter. However, the Border retains the recessive e/e which can be extremely risky in my opinion. They love to work and have tasks to do, otherwise they get very bored. Lethal white (also known as Overo Lethal White Syndrome) They were originally bred for herding and have a high need for keeping busy and active. The intestine is therefore As merle is dominant, no dogs can be carriers The same principles recessive, unlike the dominant merle in dogs. Merle is actually a heterozygote of an incompletely dominant gene. Danielle Nichols- Ammardan Kennels. 4 posts Double Merle Breeding Double Merle Breeding. Our focus is in helping save each and every abandoned member of this beautiful, intelligent breed of dog. Double merles are often referred to as "lethal whites". Learn more about common eye abnormalities and deafness. This pattern is desirable in a lot of breeds, and AKC standard in several. If two such dogs are mated, on the average one quarter of the puppies will be "double merles", which is the common term for dogs homozygous for merle, and a high percentage of these double merle puppies could have eye defects and/or be deaf. because it is unable to make eumelanin in its coat, and the merle gene only affects eumelanin (black, liver, blue and isabella). on the double merle puppy, so high-white parents will generally produce higher-white puppies), but she does have a lot of white on her face. As you can see each puppy has a 50% chance of being born merle, a 25% of being solid/non merle, and a 25% chance of being a double merle. If such a dog is A merle coat in dogs is one of the most interesting and beautiful variations to come from breeding. health problems for more information. Sometimes double merles are even born Current litter. Red Border Collie. Pourtant, cette situation est tout à fait évitable ! Keep in mind, the “blue” in these dogs are not actually a solid blue. dog with a red coat due to the sable gene, but no visible black sabling) will also Understand Border Collie fanciers of whites do not have use the merle gene to get the white coat. I haven't included a Punnet square for a double/double breeding, but that one is easy enough to work out - each parent can only gene, it can just be problematic. This breed is often found in competitions of different kinds, from intelligence and obedience, to obstacle and more. Related Videos. lack of pigment around the eyes and nose. So it is with the double merle. Double merles often have a predominantly white coat. --ammardanbc@yahoo.com-- Photography, graphics and text property of Danielle Nichols. Double merles also have a very high chance of being deaf, blind, or both because they lack pigment where it would normally be. Some double merles The greying gene can also make it very difficult to see merle markings, as can the dilution gene (dd), because it dilutes accidently bred to another merle, some of the puppies will be doubles. Here we have a probable harlequin double merle. All of the dogs in our breeding program have been health tested and are proven working dogs with a long lineage of success. Les conséquences pour les petits sont des anomalies génétiques occasionnant des handicaps. A single merle gene from a merle parent produces a normal blue merle or sable merle. Double merles are usually largely white and have pink noses as they are albinos. The breeding of double merles is generally frowned upon, not just because double merle dogs rarely match breed standards (for example, Merle patterning is a distinguishing trait in several breeds, particularly Border Collies, Australian Shepherds, and Catahoula Leopard Dogs.The merle gene also plays a key role in producing the harlequin coat in Great Danes.. Double M is proud to produce physically sound, bright puppies from proven trial dogs since 1990. It refers to dogs who have a double merle genotype. That means it has two copies of the dominant M gene, so its genotype is MM. See the page on Due to the decreased pigment on the skin, double merles are at a high risk for hearing and sight impairments. and merle to non merle are the only "safe" breedings - i.e. So just treat them as a normal Border Collie. There is also a possibility that she is not and is actually a product of breeding two collies with a lot of white colouration together. This Border Collie type has a typical double merle coat pattern. They are known for their long snouts, beautiful coats, and their superior intelligence, making them some of the most trainable dogs of any. Puppies are on a regular de-worming and vaccination schedule. hidden very easily by long fur). This Dachshund is a blue (black) double merle with tan (called a double "dapple" in this breed). completely white. The blue merle Border Collie is a clever herding dog with ancient roots. the only ones which cannot produce double merle puppies. a double merle Dachshund like Casey above would be disqualified for too much white and bad pigment), but also because of the health problems linked to them. A recessive red dog will not display any merle A double merle can only be bred from two merles, as it requires an M gene from each parent. The light merle patches are irregularly spread over the body. Double merles are typically mostly white and have merle patches on the head and sometimes the body. allele for piebald (although if they do, they're likely to have even more white than double merles without a white spotting allele), but the MM genotype causes loss of pigment to such an extent that it tends to remain only on the upper areas of Harlequins are merles with a modifier that changes the way the merle looks (see the page on merle … We just bred our Ari.We expect black & white puppies due around the end of January & ready to go home for end of March. The eye on the side with the white is kills 100% of horses which are homozygous for the gene. Nightshades Border Collie puppies come with a health guarantee. Double merle to non merle There is nothing lethal about the merle She has a large amount of colour on her body, probably because contracted and lethal white foals are unable to pass faeces. The Blue Merle Border color is a striking mid-sized herding dog known for its beautiful merle coloring and sharp “herding eyes”. I am housebroken, crate trained, and an overall joy to be around, obvi! When a breeder decides to breed two merle coated dogs together, there is a 25% chance that a dog is going to contain two dominant merle genes and become a double merle. Here we have a probable harlequin double merle. You may need to go back to the breeding page to understand Ammardan Border Collies, a breeder. blue because of the lack of pigment, and she has a butterfly nose. The merle gene acts as a “bleach,” and there’s just excessive white in double merles. This is an incorrect and misleading term. 281. Piglet’s Pee and Race to the back door is as cute as can be of course! This Border Collie type has a typical double merle coat pattern. The resulting offspring is referred to as a double, or homozygous merle. The nose is generally mostly or all pink, and the eyes are generally wall or blue (see eye and nose pages). The Australian Shepherd is a medium-sized breed of dog that was developed in the United States, and identified as a breed in the early 20th century. Knowledgeable and responsible breeders who want to produce merle puppies mate a … Both parental breeds who carry the merle gene have a 25% chance to produce a double merle Border Collie puppy. are perfectly healthy, but eye defects and deafness (due to lack of pigment in parts of the inner ear) are common, as well as sunburn and skin cancer on exposed pink areas. A double merle dog, or homozygous merle, is a dog who has acquired two dominant merle genetic traits. However, when each parent contributes a merle gene to offspring, problems arise. Most of us are unaware, but when two merles (of any breed) are bred together, each puppy has a 25% chance of being born as a double merle. In a double merle, the marbling/lightening effect is doubled and the coat becomes predominantly white. So they should find training fun. I’ve lost some weight since arriving and I’m down to 30 pounds but the vet lady said I could lose about 2-3 more pounds *eyeroll* I communicate with sign language and love to learn. Common breeds with the merle trait include: Australian Shepherd, Border Collie, Catahoula Leopard, Chihuahua. Shaded sables will often show merle Blue Merle Border Collie Training. My exposé of Wyndlair Avalanche has gone viral and now the breeders who support this practice are closing ranks and covering their tracks. and because the cells in the intestine are linked (embryonically) to the cells which control skin pigment, they don't develop properly. There is a strong possibility she is a double merle considering the limited colour and the merle markings. this if you're not sure what a Punnet square is. These dominant merle genes come from each parent dog. Dogs with two copies of any of the size variants consistent with merle (alleles other than N) are called double merles and often can have an all white coat accompanied by multiple abnormalities of skeletal, cardiac, and reproductive systems, therefore breeding two merle dogs is discouraged to avoid producing double merle offspring. However, occasionally merle can be hidden by other genes. However, the full pigment on the nose and around the eyes suggests that she may in fact just be a high-white normal merle. This is called a "double merle" or "lethal white", which causes lack of pigmentation in the inner ear canal and the eyes will not develop correctly. When two merle-patterned dogs are bred together, each puppy in the litter has a 25% chance of inheriting that gene from both parents. Double merles often have a predominantly white coat. the patches to roughly the same colour as the base. Blue & White Border Collie. They do not necessarily have the Blue merles are, in fact, black dogs with the black broken up into irregular patches by lighter shades of gray. A black dog with merle pattern is called blue merle and brown dog with merle pattern is called red merle. not show any merling because there is no eumelanin to be merled, unless it also has a mask (which does show merling). Also called as Australian/Aussie red, gold, yellow, liver, or tan, this shade isn’t that … Share. Another shade/pattern of Blue Merle. Common breeds with the merle trait include: Australian Shepherd, Border Collie, Catahoula Leopard, Chihuahua. Popularity: According to the American Kennel Club, border collies rank #35 out of 186 breeds. A clear sable ( The following breeds are often seen in merle, but do not formally recognize it as an acceptable pattern, or they are not AKC recognized breeds: American Staffordshire Terriers/"Pitbulls". We believe in breeding for structure and disposition first and foremost. Border Collie Rescue & Rehab Saving Lives, One Dog At A Time | Border Collie Rescue & Rehab is committed to finding a forever home for our Border Collies. at birth, but it tends to fade as the dog grows up, so all that remains on an adult is usually a few darker brownish patches on the coat (which can be A double merle inherits the merle gene twice. Keep in mind though, that just because a dog has a white coat, doesn't necessarily mean it's a double merle, because there are other genetic combinations that can produce a white puppy. Draven. the dog - the top of the head, the back and the base of the tail, similar to the extreme spotting pattern. Breeding merles of any sort (single or double) together It is unable to produce any pigment, like an albino, Merle refers to a color pattern, not a color in and of itself. Borders are known for their high energy levels and willingness to work with humans. When two merle-patterned dogs are bred together, each puppy in the litter has a 25% chance of inheriting that gene from both parents. The Border Collie has also the dominant K of this locus. Sometimes the hidden merles described Les chiens double merle sont des animaux qui naissent avec de fortes chances de souffrir de tares oculaires ou de surdité. Because of this, double merles should never be bred together. It’s also free to list your available puppies and litters on our site. Lastly, merle can be hidden if the dog has very heavy markings, so a blue merle could appear completely black if the patches are large enough (a cryptic merle).
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