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Are Blue Roan Horses Rare

author
Brent Mccoy
• Thursday, 03 December, 2020
• 40 min read

True roans are described as classic, and they do not include the partials or patterns, such as varnish, Fabiano or Sabine. This means the horse has an even mix of white and black hairs across their full bodies (excluding the legs and face).

nokota roan horse rare star horses breeds animals bluebell wild breed indian saving she most summer
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Contents

So, not only are true blue roans distinct, they are actually different in their genes. There are many unique roan variations but, most stock horse registries recognize three distinct types for registration purposes.

About is kind of a funny word if you haven’t heard it before so let me explain. Some Sabine horses express their coat color in a way that makes it appear that they are roan.

In fact, this is fairly common in purebred Arabian horses where the roan gene does not exist. Many other breeds experience patterns that are irregular patches of white with rough edges known as Sabine.

Unlike a true roan that will have an even mix of white hairs all across their main body, Fabiano has white hairs that are more clustered around the base of the tail and on the flanks. Horizontal white hair stripes can be seen at the tail’s base.

Photo by the author. A varnish roan can be found in breeds with appaloosa characteristics. In a varnish roan appaloosa, patches of skin that are closely adhered to the skeleton, such as on the face or at the legs, do not grow as much white hair.

horses rare gypsy vanner horse roan stallion most seen ever breed colors bellagio breeds grey cob mane nothing these
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I do want to make a quick note about the roan parent rule. This is, in fact, how the roan gene came to even exist in the Thoroughbred breed.

Keep in mind that you are more likely to win the lottery and be struck by lightning on the same day as have a foal that happens to have a random gene mutation resulting in the foal being roan with non- roan parents. That being said, if you want to try and breed your mare or stallion for a blue roan foal, here are some things to consider increasing your chances.

If either parent is homozygous for about (AA) there is zero chance of producing a true blue roan foal. This will help you choose the mate that will give the best possible chance for a blue roan foal.

The test is easy and only requires you to mail in a hair sample. Once you know your horse tests either AA or AA for about, your single best shot of getting a blue roan foal is to find a blue roan mate that is both homozygous for roan and homozygous for black.

This guarantees the foal will be black based and carry roan. This depends on whether either horse carries any other color modifying genes.

horse horses colors roan rare markings quarter patterns coat baby pretty genetics colored colour ponies wild american coloring most dogs
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In addition, if your horse tested AA, there is a 50% chance of passing on the dominant about gene to the foal which would result in a bay roan instead of a blue roan. This includes the Arabian horse, Suffolk Punch, Baffling.

Royal Blue Boon, a famous 1980 blue roan, was the first in a line of world-class cutting horses. It is an understandable mistake since horses can exhibit characteristics of both colors.

A gray coat will first begin to show around the eyes and the muzzle. While the coats grays outs further, it can often have a roan -like appearance in the middle of the process, leading to that mistake in perception.

Roans, on the other hand, do not have a graying gene to enable them to grow more white hair as they age. The fact that they are a bit of an optical illusion of white on black, too, just makes them all the more special.

Remember that I am going to oversimplify on this whole page in an attempt to make this a quicker and easier thing to understand. If you go on to read about color genetics, you'll realize here that some things (mainly vocabulary) aren't quite correct or are very oversimplified, but my goal wasn't to be 100% correct--it was to water down the genetics info to make it easier to understand.

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The color of the horse's legs is controlled by the E and e locus alleles (we'll call it a gene, though that's not quite correct). One E will override any e, so any horse with an E (capital letter) will have black legs.

See http://www.vgl.ucdavis.edu/horse/redtest.html for more details, and information about testing for red factor. A horse's body color is controlled by the black gene (E) above.

The About gene is a dominant gene, and if its dominant form (A) is present in a foal, the foal can NOT be blue roan (or black, or grille). The About gene mainly affects the color of the body, but not the legs, mane, or tail.

A sorrel horse can have one or two About genes, as can a bay (their bodies are red). But a black, grille, or blue roan horse cannot have any dominant About genes, because they have black-colored bodies.

The capital letter A represents the red body caused by the About gene, while the small letter a represents the lack of the About gene (which allows for black bodies). Aa, which is a horse with a body color that matches its points (legs, mane, tail).

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The body can be either red or black, depending upon the red/black genes (e and E) discussed above. EE or EEA (black legs, black bodies) EE AA, or EEA (black based)Another comment about About genes: The only ways to know for sure if a horse carries the About (red body) gene are to have foals from the horse that express the color (bay-based colors), to have that horse actually expressing the gene (black legs with red/yellow body), to know the genetics of its parents, or to have him genetically tested (see the bottom of this page for information).

In reality, the About gene prevents blacks by turning them into bays. Keep in mind that sorrel/chestnut colors can carry the About gene, even though they don't show it.

This horse will pass along roan pattern to about half of his/her foals. Both of this horse's parents must have carried and shown the roan gene.

This type of horse is very rarely found because it is theorized that the fetus dies inter when it carries two roan genes. Some exceptions do reportedly exist, so there is controversy whether the RR embryo does die or not.

See Equine Color Genetics by Dr. Phillip Spangenberg, 1996, p. 58 for more information on this theory. Dr. Anne Bowling of the University of California at Davis disproved the above theory before her death.

horses roan horse quarter pretty rare eyes mare stallion colored colors american wild animals breed beauty four horsegroomingsupplies names most
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The original study that started that theory of lethal homozygous fetuses was never replicated, and she did a study and proved that the percentages of foals with and without color followed the statistical projection as if there was NO lethal state. So, according to the modern research (2002, I believe), it is just fine to breed two roans together.

I generally look first for black legs, and then for body color, and then on and on to determine the best guess for a horse's genotype. If a horse is EE AA RR, it will be a sorrel or chestnut.

AA means it has a red body (A), and RR means it does not carry roan factor, so it isn't a strawberry roan, but rather is just a sorrel. If a horse is EE AA RR, it will be strawberry roan.

It is not possible to tell if it has an A, because the A only expresses itself visually when the horse has black legs and a red body. Marks mean that I don't know what the horse has at that location in its genetic structure.

But lifting the hairs on the hips and above the tail can provide early clues. If the underwear is white or silver, then the foal may roan.

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Foal #6 Born sorrel, but showing some roaming. Many roan breeders like to cross on gray mares, but I am concerned with that practice.

But by the time the foal is 5 years old, it's just a plain old gray. My suggestion to you, as a buyer, is to be wary of buying a roan foal that has a “gray” parent.

As a breeder, my hope is that you'll try to accurately represent foals resulting from roan to gray crosses, and even to educate the buyer, so they are prepared in the event that the foal turns gray. Learn more about Roan vs Gray colors by clicking HERE.

This horse will not turn white, and will always retain black legs, mane, tail, and head. Note that the face is lighter than the body, and the tail is lightening.

This ticking can spread toward the top of the hip and toward the withers, but doesn't cover the whole hip, belly, back, and neck of a horse like roaming caused by the roan allele does. Specific kinds of ticking include that caused by the Sabine and by Fabiano patterns.

roan horse horses genetics gray helpfulhorsehints colors descriptions rare coat andalusian spaniel cocker true
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Click here to learn more about white patterns other than roan. Click his name to see his web page, or his photo to see the white ticking up close.

This little pony is neither roan nor gray, and is probably exhibiting lots of Sabine white pattern. Lauren and Frosty. For example, if a horse is heterozygous for black and heterozygous for roan (E/e Rn/RN), some believe that the roan gene is either “attached” (poor wording) to the E (black) or e (red) allele.

As an example, lets say that a blue roan stallion's roan is attached to his E allele. In the other direction, let's say that a blue roan stallion is EE, but his roan is attached to the “e” instead of his “E” allele.

To prove the theory, following EE Rn/RN stallions would be necessary (unless I need more coffee at the time I'm typing this to activate my brain! This is hard to track without looking at large numbers, and knowing the stallions' and ALL the mares' genetics for E and Rn, and also testing foals for bogosity.

At this time, I'm looking for valid research that supports gene linkage between Roan and Red Factor. Knowledge gained over the years from books, articles, and acquaintances made vie e-mail.

horses roan rare most horse gypsy caballos gray grullo colors dun caballo inspiremore majestic parecen vivas obras arte coats robes
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Dr. Phillip Spangenberg, DVD, Ph.D. Equine Color Genetics. If someone has sent a photo to us for use on our pages that belongs to you, and if they did not have permission to do so, please let us know.

But please do not alter the photo or place your contact information on it. I had seen a fair bit of chatter online about how they cash the checks and don't give the results of the test.

Guess what...they sent back two of my horses test results and after 4 1/2 months, the third was still missing in action! Repeated phone calls and e-mails were ignored by the lab.

Finally, five months after the test, someone gave me the results for the third horse. If you choose to use this lab, my opinion is to only send them as much money as you are willing to lose, in case you don't receive your results.

In both cases, Shelter wood does not return their repeated phone calls. Please, only send us photos for this page if you know your foal's color.

arabian horses rare roan horse colors colored pinto arabians horseland purebred wild whiteoak stables player game mare breeds most stallion
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If your foal is a Paint or Appaloosa, we will only use it if the vast majority of the foal's body is not included in the white patterned areas, as this page is intended to help people determine foal colors, so the colored hairs must be very obvious. This is an educational page, and photos should show a safe environment and healthy horses.

I don't even know how to respond when I receive photos of wormy, skinny horses in pastures littered with abandoned cars, farm equipment, wire fences laying on the ground, and falling-down buildings. I simply can't put photos like that on an educational page like this, where people come to learn.

Please note that this is not intended to be a free opportunity for you to advertise your breeding operation, and instead is an educational page. Feel free to click the “Send Your Photo” logo at the left to send a good photo or two to us for inclusion on our color pages.

If someone has sent a photo to us for use on our pages that belongs to you, and if they did not have permission to do so, please let us know. But please do not alter the photo or place your contact information on it.

My neighbor just bought a five-month-old blue roan, so I decided to bring my grandson to see the colt. Afterward, he wanted to know all about blueroanhorses, so I did some comprehensive research to provide all he could wish to know about this fascinating horse.

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Blueroanhorses have a color pattern with a relatively even mixture of black and white hair that creates a blue appearance. A couple of popular equine breeds without blue roans’ are Thoroughbreds and Arabians.

The distinction is difficult to comprehend, but by thinking about human genetics, it becomes clear. The blue roan my neighbor recently purchased is a registered American Quarter horse.

They originally were bred for racing short distances in the early colonies, over 200 years ago. Today’s Quarter horse is a versatile and athletic breed that participates in many equine events.

It’s believed quarter horses acquired the roan gene through its European ancestors, including Belgians, Percheron's, and Welsh ponies. The Percheron Association of America was established in 1876 and set strict standards for the breed.

At its peak, the Percheron Association of America was the largest in the world registering over 10,000 horses annually. Percheron's horses, like most draft breeds, have a calm demeanor, but they are also alert and willing workers.

horse roan markings murgese breed stallion horses rare breeds riding dapple colors miniature pretty pinto zenith halter reverse royal seen
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By Stacy L. Pearsall In the United States, Belgian horses are typically bay or chestnut, with white markings on their face and legs. Belgian are a large draft breed with a docile nature and amazing strength.

The Flemish horse has influenced many draft breeds, including the Shire and Clydesdale. Welsh ponies can be red or blue roan and various other colors, including black, gray, bay, roan, cream, or chestnut but never piebald or skewbald.

They’ve been used to pull chariots in sporting arenas, worked in coal mines, and used as a ranch pony. The American Paint horse breed is typically a combination of white and another color such as black, bay, palomino, chestnut, dun, or blue roan.

A horse with the over paint pattern has four dark legs and no white between its withers and tail. Most overs have a lot of white marking on their head and a solid colored tail.

The Pass Fine Horse Association accepts all colors for registration, and the breed does possess the roan gene. The breed has three distinctive strides; the fastest is the Pass Largo gait.

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When in this stride, the animal can travel 22 miles per hour and maintain a smooth pace. Pass Finds are on the smaller size; they only average 14.1 hands tall but can carry heavy loads with ease.

Roan RNA Shadow Dusty Ghost Breeze Speckles Sprinkles Thunder Stardust The study of genetics attempts to explain why and how individual living organisms inherit traits, characteristics, or structural features from their ancestors.

Roan is symbolized by the Rn allele in genetics and is dominant, which masks the effect of a different variant on the same gene. Homozygous roans can’t be distinguished by their appearance but can be identified through the animals’ DNA genotype.

An animal’s genotype is its set of heritable genes that can be passed from parents to offspring. However, genetics is complicated; for example, the mutation responsible for a true roan has not been precisely identified.

Breeding roan and chestnut with specific gene sequence will produce a blue roan appearance. If you want to learn more about roan genotypes testing, I suggest starting at the UC Davis site here.

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We’ll trace the word’s etymology, traits unique to roans, and some other fun facts about blueroanhorses. It may be based on the Spanish word Romano or radio connected to Germanic Ramos, meaning red.

King Henry VIII imported roan barbs and used the horses to develop the Thoroughbred. King Henry VII bringing the horses to England, may have prompted Shakespeare’s fascination with this equine color.

It typically refers to an even mix of white hairs with the animal’s base color. Roan animals also commonly have fewer white hair on their heads and lower legs.

Some animals that display roan coloring are horses, cattle, antelope, and dogs. Unlike grass that may be born dark and lighten as it ages, a roan exhibits their coloring at birth.

If a roan horse gets a cut or scrapes its skin, the injured area grows back solid without any white hairs. Dappling in horses other than roans appears as dark circles on the animals’ coat.

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But technically, only a horse with a black base with intermixed white hair is a blue roan and considered a “true blue roan. For most experienced equestrians, color doesn’t affect a horse’s price as much as conformation, pedigree, and training.

However, a beautiful color coat is desirable, no doubt, and may increase the horse’s worth but not much. The mare is old and primarily spent her adult life as a broodmare; however, she was used for a couple of years as a ranch horse.

Blueroanhorses have a mixture of black and white hair intermixed throughout their coat, and their head and lower legs remaining dark. All horses are beautiful, but this gallery of unique stallions and mares take majestic to a whole new level.

With an unbelievably shiny coat that appears to be metallic in the sun, the Akhil Take is the national emblem of the country of Turkmenistan. As it turns out, the type horse photographed above has been famous since this picture of him as a foal surfaced online.

All I know is that his mane and tail PERFECTLY compliment his super shiny coat. Easily recognized for their leg feathering and common black and white or “piebald”coat color, the Bluesman version of the beautiful Gypsy horse is considered most rare.

roan horse quarter horses aqha american rare spaniel peptoboonsmal breeds cherokee
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Lush locks and an extraordinarily bold coat make this horse a regular show-stopper, but perhaps unique are the star-shaped dapples on his front end. While not as rare as some other horses on this list, this cello is a blonde beauty.

It is a coloration that is almost instantly recognizable, making roan horses highly sought after and desired by equestrians around the world. A roan horse’s head and the lower portion of their legs are usually in an almost or completely solid color.

The white, pigmented hairs are mixed evenly throughout the roan -patterned area. The classic roan coat coloration is an inherited trait through an autosomal dominant gene.

All roan horses have the natural horse base colors and the roan pattern is simply interspersed within it. There are 3 specific classic roan variations that are most often recognized by horse registries.

These are the most common variations of the true roan pattern trait. Red roan is the term used to describe roan horses that have a deep chestnut-based coat.

roan horse horses murgese rare stallion reverse carletto dapples dapple clydesdale dressage markings appaloosa quarter dappled curci pretty paint jolanda
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Solid chestnut colored horses can have a light to dark reddish-brown coat pattern throughout their entire body, including their lower legs. A palomino-colored horse has a gorgeous golden coat with a white or yellowish-white mane and tail.

Buckskin horses have tan colored bodies with black lower legs, manes and tails. Buckskin roans will have black legs, black mane and tails as well as tan or golden hair with white evenly interspersed throughout the rest of their bodies.

They have a definitive darker shaded stripe that runs down their backs, a trait that sets them apart from bays and other horse colors that may appear dun-like. Paints can have roan coloring including all the different roan shades including bay, sorrel, chestnut, black, dun, black, and palomino.

Like duns, grille horses have lighter bodies with darker legs, manes and tails. A grille roan ’s shading can appear silver, blue, black, or gray.

It is distinctly different from the classic roan pattern because the white interspersed hairs are not evenly spread out. The pattern is also lighter in the flank and belly area extending out to different parts of the horse’s body.

roan horses wild horse rare mustang mustangs stallion roans breed breeds
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Sabine patterned horses are characterized by their white spotted areas. If the Sabine pattern is minimally expressed, it may simply look like a normal paint horse.

If it is exponentially expressed, a Sabine horse can look a lot like a classic roan. As varnish roan horses age, the amount of white hairs throughout their coats will increase.

Varnish roans are also not genetically related to classic roan horses. Instead, they are a variation of leopard complex patterns in breeds like the Worker, Appaloosa, and the Knabstrupper horse.

Weather changes will cause a horse to grow thicker coats of hair during cold months, which can cause a noticeable lightening or darkening in the color of any horse, especially roans. They will return to their normal roan shade during the spring and summer.

There are times when certain areas on a roan ’s coat will change for various reasons. Sometimes, when a roan horse is scratched or suffers a wound that causes hair loss, the hair will grow back in a solid color instead of with the normal roan pattern.

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These spots have also been known to appear in areas that did not visibly suffer an injury. They fear that it was causing embryos to stop developing early the process.

Today, however, the Veterinary Genetics Laboratory at UC Davis disputes that idea and says that it is not true. Not every horse breed is capable of or known to produce roan color variations.

There is no argument that roan horses are visually appealing, so much so that they are often considered extraordinary among horse lovers. Asides from a test, a close visual inspection of a horse’s coat will often do the trick.

True roan horses will have evenly distributed white hairs within their colored coat, except for on their heads and legs. The true roan color occurs at birth, although it is hardly visible until the foal coat sheds.

Roans may slightly darken or lighten from winter to summer, but they do not turn progressively lighter with maturity. An unusual characteristic of roan horses is that their coat grows back in solid colors (devoid of any white hairs) when their skin is cut or damaged.

roan horses quarter verkaufspferde horse kleinanzeigen rare appaloosa trebel pretty verkaufen markings
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Horse coat color pattern characterized by an even mixture of colored and white hairs on the body Horses with roan coats have white hairs evenly intermingled throughout any other color.

The head, legs, mane and tail have fewer scattered white hairs or none at all. The roan pattern is dominantly-inherited, and is found in many horse breeds.

While the specific mutation responsible for roan has not been exactly identified, a DNA test can determine bogosity for roan in several breeds. True roan is always present at birth, though it may be hard to see until after the foal coat sheds out.

The coat may lighten or darken from winter to summer, but unlike the gray coat color, which also begins with intermixed white and colored hairs, roans do not become progressively lighter as they age. The silvering effect of mixed white and colored hairs can create coats that look bluish or pinkish.

Horses with the roan pattern have an even mixture of white and colored hairs in the coat. These interspersed white hairs are more scattered or absent on the horse's head, mane, tail, and lower legs.

horses horse gypsy vanner breeds roan clydesdale stallion touchdown unusual unique most stallions draft sd stables pretty spruce ridge friesian
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The unaffected color on the legs often forms a sharp, inverted “V” above the knee and hock, not seen in other roan -like coat patterns. The non-white background coat may be any color, as determined by unrelated genetic factors.

The most common terms for various roan colors are the following: In 1999, the American Paint Horse Association changed its coat color descriptions: roans with a chestnut background coat are registered “red roan “, while “bay roan is its own category.

The American Quarter Horse Association followed suit in 2003. Previously, the term Strawberry roan described the pinkish color of a light chestnut or sorrel roan.

Some roan horses have more white hair than others, and even individual horses may look lighter or darker based on the season and their coats may vary from year to year. While roan is always present at birth, the soft first coat of newborn foals may not show the white hairs well.

Generally, roans appear to have more white hair when they have their short summer coats and darker when they have their winter coats. The forelegs of this bay roan show the characteristic inverted “V” of dark hair not affected by roan. Roans have other unusual characteristics.

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If the skin is damaged by even a very minor scrape, cut or brand, the coat grows back in solid-colored without any white hairs. These regions of solid-colored coat are called “corn spots” or “corn marks” and can appear even without the horse having had a visible injury.

Another trait is reverse dappling; many horses develop rings of hair that appear slightly different-colored, called dapples, which often indicate good health. In the most general sense, the word roan refers to any animal with a mixture of white and colored hairs in the coat.

In studies of the white patterning genotypes of laboratory mice, no fewer than four produced roaming or flecking. Therefore, the existence of other types of roaming conditions not covered by those mentioned here is possible and likely.

A young gray horse may appear roan, but will become lighter with age Blue roans, such as these may be confused with young gray horses or blue dungeons are sometimes mistaken for grays. The defining characteristic of the gray coat is that it becomes progressively lighter over time.

Mature grays may retain none of their original coat color, and have a white coat, while the color of the skin and eyes is unchanged. Unlike grays, roans do not develop more white hair with age, and without white markings, roans retain colored heads.

horse brabant roan draft rare filly belgian alamy
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A blue dun or grille has no intermingled white hairs in its body coat. Blue dun or grille (also grille, mouse dun) coloring is created by the dun gene acting on a black base coat, is a coat color with a bluish cast and darker points.

Unlike blue roans, grills are solid color and appear bluish due to low amounts of pigment in each hair, not interspersed white hairs. Like other dun coat colors, grills have dark or black primitive markings, always including a stripe down the back.

A bay roan that also has bay Fabiano features evidenced by the light hairs in its mane and base of tailbone pattern of roaming is Fabiano, also called white ticking. While true roans have an even intermixture of white hairs throughout the body, except the extremities, the white hairs of a Fabiano are the densest around the base of the tail and the flank.

Fabiano roaming frequently forms rings of white hair around the base of the tail, and in extensively loaned radicals, the white hairs may converge to form vertical stripes over the rib cage. Fabiano is found in many breeds, and may account for some roan Arabians.

A varnish roan Appaloosa, showing white sclera, mottled skin, and darker bony regions such as the cheekbones. Roaming is also associated with some Sabine white spotting patterns.

horses rare roan pretty horse paint dash society breeding dark she game easily caught isn won
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There are many patterns in many breeds called “Sabine,” and these patterns usually feature irregular, rough-edged patches of white that originate from the lower legs, face, and ventral midline. The leopard complex colors, characteristic of the Appaloosa breed, have several manifestations that feature mixtures of white and colored hairs.

A varnish roan, one type of leopard complex coat color also called “marble”, is an all-over blend of white and colored hairs. Patches of skin that lie close to the bone, such as on the face and legs, and the point of shoulder and point of hip, do not grow as much white hair.

These darker patches are called “varnish marks” and are not found in true roans. Varnish roans can also be distinguished from true roans by the presence of leopard complex characteristics, such as the white sclera, finely striped hooves, and mottled skin around the eyes, muzzle, and genitals.

True or classic roan is common in European draft breeds such as the Brabant, Rennes, Trait Du Word, Italian Heavy Draft, and Rhenish-German Cold-Blood. It is also found regularly in North American breeds like the Quarter Horse, Paint Horse, Peruvian Pass, Pass Fine, Standard bred, Spanish Mustang, and Tennessee Walking Horse.

True roan has not been satisfactorily identified in Arabians or Thoroughbreds. Thoroughbred “roans” are described by the Jockey Club as a mixture of white with red or brown hairs, but which researchers identify as chestnuts turning gray.

horse roan coat grey common dun dapple colours silver colors cavallo rare pferd allgemeine horses comuni cappotto colori vector inzameling
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The Arabian Horse Association defines roan as an even mixture of white and colored, usually chestnut, hairs, but researchers suggest this may actually be a unique type of white pattern, probably Fabiano, or, occasionally, minimally expressed Sabine. This strawberry roan mare, though very light-colored, is still identifiable as a roan by the dark color of her extremities and the brand on her hindquarters, which has grown back in without white hairs.

Roan is a simple dominant trait symbolized by the Rn allele. Finding neither stillborn nor sickly, short-lived foals from these roan parents, the researchers concluded that in the homozygous condition the roan gene was lethal to the embryo or fetus.

Other studies at the time were using progeny ratios to identify potential lethality related to other coat colors, such as dominant white and lethal white,” and so roan was believed to follow a similar pattern. Genetic science in the 1970s could not provide a clear answer, as methods of molecular analysis had not yet been developed.

Homozygous roan stallions were identified in both European populations of Belgian horses in 1977, and in North American, in Quarter Horse stallions. In some breeds, homozygous roans can be identified by an indirect DNA marker test.

Such horses, with the genotype Rn/Rn, produce 100% roan offspring. During the production of sex cells, DNA is “reshuffled” to ensure that the next generation does not inherit, for example, grandpa's chromosome 8, but a mixture of DNA from each parent.

Instead, paired chromosomes exchange parallel pieces of DNA, a process called chromosomal crossover, prior to being passed on to the next generation. When particular genes are located physically close together on a chromosome, they tend to be passed on together.

The rate at which two genes are passed on together can be used to calculate their distance from each other on the chromosome. This dark bay roan, painted in the 18th century carrying the Duke of Nuremberg, has dark extremities and corn spots. Equine linkage group II includes a number of genes.

The first linkage was found between a blood type marker and Tobago white spotting in 1978. In 1982, a linkage grouping was proposed, including three genes for serum proteins, and three for coat color : Tobago spotting, chestnut, and roan.

Research since equine linkage group II was defined has identified the exact location of the Tobago allele and the chestnut allele. The region of the chromosome that harbors the roan gene is homologous to parts of chromosomes in other species that also control coat color, even some similar to roan.

While a chromosomal inversion of KIT causes Tobago white spotting, KIT also harbors one or more alleles responsible for Sabine spotting, no fewer than eleven alleles responsible for dominant white spotting, and is thought to be a major contributor to many other forms of less distinctive white markings. The effect of linkage between roan and chestnut is readily observed.

Normally, the chestnut and roan alleles would be separated during chromosomal crossover, but these two linked genes will usually remain together. If, on the other hand, the recessive e and dominant Rn were on the same chromosome, the horse would be expected to produce primarily chestnut roans and non-chestnut non-roans with chestnut, non- roan partners.

“Close association between sequence polymorphism in the KIT gene and the roan coat color in horses “. ... blue roan comes on a dark (black, brown, or liver chestnut) background.

^ Locke, MM; MCT Opened; SJ Bruckner; LV Million; JD Murray (2002). “Linkage of the gray coat color locus to micro satellites on horse chromosome 25”.

The progressive loss of color in the hair of gray horses is controlled by a dominantly inherited allele at the Grey locus (Gag). UC Davis Veterinary Genetics Laboratory.

“4 / Patterns of White Occurring on Base Colors”. “Exon skipping in the KIT gene causes a Sabine spotting pattern in horses “.

The American Stud Book Principal Rules and Requirements. “The paper by Hints and Van Fleck caused all this commotion, but there were earlier mentions of a roan cross being lethal, too,” Opened explained.

“But it was never fully established by any molecular analysis that homozygous roan horses would not be produced from ratings of two roan parents.” “Linkage of Tobago coat spotting and albumin markers in a pony family”.

“Close linkage between the albumin and GC loci in the horse”. “A linkage group composed of three coat color genes and three serum protein loci in horses “.

^ Haas, B; Jude R; Brooks SA; Lee T (June 2008). “An equine chromosome 3 inversion is associated with the Tobago spotting pattern in German horse breeds”.

Maryland, L; Miller MJ; Sandberg K; Anderson L (Dec 1996). “A misses mutation in the gene for melanocyte-stimulating hormone receptor (MC1R) is associated with the chestnut coat color in horses “.

^ Haas B, Brooks SA, Schlumbaum A, Razor PJ, Bailey E, et al. (2007). “Allele Heterogeneity at the Equine KIT Locus in Dominant White (W) Horses ".

^ Haas, B; SA Brooks; T Took; D Burger; P-A Ponce; S Raider; T Hasegawa; C Opened; T Lee (2009). “Seven novel KIT mutations in horses with white coat color phenotypes”.

^ Raider, Stefan; Christian Dagger; Gabriela Obexer-Ruff; Toss Lee; Pierre-André Ponce (2008-02-21). “Genetic Analysis of White Facial and Leg Markings in the Swiss Franches-Montagnes Horse Breed”.

Our association analysis indicated that the putative major gene for white markings is located at or near the KIT locus Wikimedia Commons has media related to roan horses.

XXX ATHENA HANCOCK clear;XXX ATHENA HANCOCK) Unlock, Washington 98596 USA 2020 BlueRoanAQHA Quarter Horse Mare BLUEROANBLUE VALENTINE HOMOZYGOUS BLACK FILLY … Starlight Greenfield, Missouri 65661 USA 2020 BlueRoanLusitano Filly Rareblueroan Luciano/HQ.

He has been used for trail, roping, sorting pairs, and has been used as a pony… ROC Hickory’s Angel aka Ellie is a 10-year-old blue roan, quarter horse.

UPDATE: Have decided to retain this colt for myself for a future stud. UPDATE: SOLD Reduced price, I'm finishing up my season and time for him to go.

UPDATE: SOLD May 6 True Bluesman filly with a super cute head. (SOLD) Very sweet, in you pocket type of filly in a Bluesman package with a pretty head.

SOLD MF WYO ANGEL IN BLUE True Bluesman Yearling Filly born May 9, 2019, She has an INCREDIBLE ... UPDATE: SOLD Offering a real Beefy Bluesman Filly with a star.

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Sources
1 www.tophorse.com.au - https://www.tophorse.com.au/horses-for-sale/quarter-horse--western/Region=Queensland/
2 www.gumtree.com.au - https://www.gumtree.com.au/s-horses-ponies/qld/quarter+horse/k0c18632l3008841
3 www.horseyard.com.au - https://www.horseyard.com.au/horses-for-sale/quarter
4 www.gumtree.com.au - https://www.gumtree.com.au/s-horses-ponies/qld/quarter+horse/page-2/k0c18632l3008841
5 www.horseseller.com.au - https://www.horseseller.com.au/horses/qld/
6 www.danielsonquarterhorses.com - http://www.danielsonquarterhorses.com/
7 www.australianwesternhorseshowcase.com.au - http://www.australianwesternhorseshowcase.com.au/
8 rosewood4721.tripod.com - http://rosewood4721.tripod.com/
9 www.galbreathquarterhorses.com - http://www.galbreathquarterhorses.com/
10 fletcherquarterhorses.webs.com - https://fletcherquarterhorses.webs.com/forsale.htm
11 johnstonquarterhorses.homestead.com - http://johnstonquarterhorses.homestead.com/salehorses.html
12 rockinbquarterhorses.com - http://rockinbquarterhorses.com/cuttinghorsesforsale.htm