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Topic: Dun gene

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Equine coat color genetics

Champagne gene

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	NationMaster - Encyclopedia: Dun gene
		The dun gene is one of the dilution genes that affects both red and fl pigments in a horse's coat color.
		True dun factor markings do not disappear with seasonal coat changes, and are not susceptible to sun fading, but false dun (counter shading) markings are prone to sun fading and their presence generally comes and goes with seasonal coat changes.
		But their lack of producing true dun dilute shades and true dun factor markings, and a lack of grulla and red dun offspring as well, are vital points in proving the absence of the dun gene in these lines.
	www.nationmaster.com /encyclopedia/Dun_gene (1220 words)

	What's Dun is Dun
		But dun mane and tail frosting is diluted to a shade that is generally very similar to the color of the dun diluted body of the particular horse, rather than white like the frosting on a buckskin.
		The dun horse's coat must be diluted to an appropriate color corresponding with the effects of the dun dilute gene on that particular base coat color.
		Since we already know that the dun gene basically leaves the point areas of all base coat colors undiluted, it is not unreasonable to conclude that it has restrictive properties that prevent it from "invading" specific areas of the horse.
	www.duncentralstation.com /WhatsDunIsDun.html (4854 words)

	Dun Central Station - Adult Shades of Dun
		All duns, regardless of their shade, must have a coat color that has been diluted, having yellow-tan or dove/slate tones, and have some combination of dun factor (primitive) markings, such as dorsal stripe, leg barring, wither stripe, and face or chest webbing.
		The expression of dun on a brown base can be highly dependent on how light or dark the expression of brown is. Some browns are nearly fl looking, and these dark expressed brown base colors would generally tend to appear more like a grulla when the dun gene is present.
		This shade of dun generally appears to be a lighter, yellow-tan, lacking the richer red tones of a bay dun, due to the cream gene diluting the red tones "left behind" by the dun gene's dilution effects even more.
	www.duncentralstation.com /AdultShades.html (2276 words)

	DUN in Horses
		Dun is a color pattern seen not on ly in equines but in some other animals as well.
		Dun is a dominant gene, and only one dose is needed of the dun gene to produce dun shaded offspring.
		Remember though, that not all genes are visually expressed on fl coats, so a fl-looking animal can hide other genetic factors (even a cross and stripe in a fl jack, or the palomino gene hidden in a fl stallion).
	www.geocities.com /muleguru/duns1.html (741 words)

	Equine Color - Horse & Pony Color Genetics Information
		Dun is one of the dilution genes that affects both fl and red pigment.
		The difference between this gene and the Cream dilution gene is that Dun also causes primitive markings to be present on the horse.
		Another trait caused by the Dun gene is horizontal marks on the legs of the horse.
	www.equinecolor.com /dun.html (1529 words)

	Dun Central Station - Cross Ranch False Duns
		While these combinations of dilution genes on a horse do not have a true double dilute effect as we see in the double cream dilutes (cremello, perlino and smoky cream), there does certainly appear to be what I call a 'pseudo double dilute effect' to the coat color.
		The presence of a cream gene with the dun gene does not inhibit the expression of true dun factor markings to any great degree when the cream gene is in its heterozygous form.
		Pinpointing the exact line that contributed the dun gene has been a source of much frustration because photos of the horses involved who would be in question have simply not become available to us yet...
	www.duncentralstation.com /CrossRanchFalseDuns.html (2600 words)

	CPArticle9
		The dun gene has a similar lightening effect on the base coat color, but it is very distinctive in the way it also leaves some areas of the coat undiluted.
		Dun is a dominant gene, this means for a horse to be dun, it must have at least one dun parent.
		Although there is no genetic test for dun at this time, it is believed that there is no visual difference between a heterozygous dun (horse carrying one dun gene) and a homozygous dun (horse carrying two dun genes), but the homozygous dun would, of course, always pass on the dun gene to its offspring.
	www.mfthba.com /ColorPanel/cparticle9.htm (1526 words)

	Classie Lassie LWR and Skip N Fool - APHA Dun Overo Mare
		Dun is a dominant gene that dilutes the body color of all colors but does not dilute the points.
		Dun is the result of the dun gene diluting a bay base coat.
		Grulla is one of the rarest expressions of the dun gene.
	www.giddyap.net /classie (991 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-28)
		Dun: Yellowish or tan coat with "primitive" markings, sometimes called "dun factors:" a darker-colored mane and tail, a dorsal stripe along the back and occasionally faint horizontal zebra stripings on the upper legs and a possible transverse stripe across the withers.
		"bay dun"* or "zebra dun" is terminology sometimes used to describe the classic dun color of yellow or tan with fl mane and tail when necessary to distinguish it from red duns or grullos.
		Palomino: chestnut horse that has one cream dilution gene that turns the horse to a golden, yellow, or tan shade with a flaxen or white mane and tail.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Equine_coat_color (2428 words)

	[No title] (Site not responding. Last check: 2007-10-28)
		So strong is the relation between the "dun" dilution and "primitive" markings, that these markings are now commonly called "dun factor" markings, and some registries have begun to use the presence or absence of striping as a means to try and distinguish between the different dilution genes.
		In horses, the "D" gene is dominant instead of recessive, and the dilution is not uniform, as the points are unaffected and remain the base color of the horse.
		In some countries "dun" is still the term for any dilute horse (regardless of which dilution gene it comes from), and in the USA the terms "dun" and "buckskin" were used almost interchangeably for a similar colored horse prior to 1987 or so.
	members.aol.com /battyatty/dunfoal.htm (1981 words)

	[No title] (Site not responding. Last check: 2007-10-28)
		One is considered to be at the "D" locus and is commonly called the dun gene.
		This form of "dun" dilution is associated with "dun factor" (primitive) markings, which consist primarily of a "dorsal stripe" down the back and striping on the legs called "leg barring".
		Dun was reserved for buckskins with a lot of dark smuttiness in their coats, for the more brownish shades of dun, or for horses whose manes and tails were not fl.
	members.aol.com /battyatty/buckdun.htm (1292 words)

	Color Genetics and the Registrat (Site not responding. Last check: 2007-10-28)
		The dun color is due to a brown mutation that was discovered and identified in 2002.
		The dun gene DNA test that was developed for research purposes is also available so that dun carriers (fl or red Dexters) may be identified.
		A Dexter that contains two red genes and two dun genes is red in appearance.
	www.dextercattle.org /colorgenetics.htm (727 words)

	About Grullo
		Since a dun bred to a brown, seal brown or liver chestnut can produce a grullo it may be possible that the team of dun and creme dilutions acting on other modifiers may produce a slate grullo.
		The expressed allele in a heterozygous pair is known as the dominant allele this is the gene that visibly affects the coat color or pattern, the unexpressed one as the recessive allele or "hidden recessive" and is sometimes referred to as an "invisible gene".
		We have a dun roan mare, most of the year, she looks dun, but for a couple months of the year she is roan with a dorsal stripe and she had the most beautiful dun roan colt.
	www.duncity.net /horses/grullo.htm (3744 words)

	The Champagne Gene
		The champagne gene is a dominant dilution gene, first documented worldwide in 1996 by Dr. Philip Sponenberg, Ph.D., and Dr. Ann Bowling, Ph.D. While the champagne gene did exist prior to this, it was often misidentified.
		However, the champagne gene is distinctly separate from the cream gene (palomino, buckskin, etc.) and the dun gene (grullo, dun, etc.).
		The gene causes red pigment to be diluted to gold, and fl pigment to be diluted to chocolate.
	www.chboa.com /gene.html (167 words)

	Definition of Dun gene
		Unlike the silver dapple gene (which works only on fl-based coats) or the creme gene (works on red-based coats), it has the ability to affect the appearance of all fl, bay, or chestnut (red) based horses to some degree.
		The dun gene does not cause the horse to look any different when it is present in two copies (one from both parents) than one copy (one from only one parent).
		Since dun closely resembles buckskin when it is on a bay-based (fl base + Agouti gene) horse, it is commonly confused with buckskin.
	www.wordiq.com /definition/Dun_gene (543 words)

	Justamere Ranch -- Dun vs. Buckskin
		Dun is a similar color although, according to the IBHA, it is a "duller shade than buckskin." In the past, the dun color was often considered to be more sooty or smutty.
		A sorrel or chestnut base color would become red dun (pinkish or flesh-colored with red or chestnut points) when combined with the "dun" gene or palomino (golden body with a lighter or white mane and tail) when combined with the "c cr" gene.
		If both parents have one copy of a dilution gene then the resulting foal has a 25% chance of not carrying the dilution gene, a 50% chance of carrying one copy of the dilution gene, and a 25% chance of carrying two copies of the dilution gene.
	www.justamere.com /newsletter/color.asp (1192 words)

	Info & Colour Genetics - Quality Quarter Horses , - ecomPlanet Web Hosting - the #1 Free hosting solution worldwide
		Red horses (chestnuts and shades of chestnuts) are known to be homozygous for Red, because the chestnut gene is recessive, and therefore requires two copies of the Red gene to show red as the base coat color.
		The basic color of the horse will be fl, bay, or brown, but depending on genes at other color loci, the horse may be buckskin, zebra dun (this I would like to see!), grulla, perlino, gray, white or any of these colors with the white hair patterns tobiano, overo, roan or appaloosa.
		Dun and buckskin are used rather messily to refer to horses with light red- yellow, yellowish or sandy bodies, with or without fl points (mane/tail/legs/ears), with or without dorsal stripes.
	myweb.ecomplanet.com /COOK7627/mycustompage0008.htm (1122 words)

	Bar None Morgan Ranch: Morgan Dun National Association
		Duns are from pale silver thru a peanut butter shade to a golden dun.
		Dun horses cross on many different colors other than the typical flaxen m/t chestnuts desired for palomino.
		Dun is truly a designer gene for exotic colors in a rainbow of hues.
	www.bar-non.net /duns/index.html (542 words)

	Red Mini Horse
		The gene "e" that produces red is recessive, that allows red horses to be produced from bays and fls quite often if both parents are carrying the recessive gene.
		Genes like the "cremello" gene which when present in the heterozygous form produces the palomino and when homozygous the gene produces the cremello.
		The dun gene is very similar to the cremello gene in that it dilutes the coat color but not the point color, it produces lineback duns.
	www.unicornerfarm.com /redhorse.htm (234 words)

	Home Page
		They are genes which cause a horse to have particular markings at certain locations on its coat, while diluting the rest of its body color.
		Sometimes a horse with a dun trait is summarily declared a "false dun" without exhausting the possibilities.
		The dun gene is a SIMPLE DOMINANT gene, which means only one is needed for full expression, so adding another has no effect on the horse's color.
	www.dungenes.org (1055 words)

	[No title]
		A third gene, symbolized by P for the Pangaré effect, is dominant in mode of inheritance and its presence in an animal results in the lightening of the muzzle, areas over the eyes, the flanks and the inside of the legs.
		In general, the dun coloration (the result of the action of the D gene on bay) is a darker, duller coloration than the buckskin coloration and has the dun factor markings described for the red dun.
		The gene responsible for the tobiano type of paint is dominant in mode of inheritance and is symbolized by the symbol, T. The gene responsible for the overo pattern generally appears to be recessive in mode of inheritance as overos can be produced from parents which are both solid colored.
	www.animal.ufl.edu /ans3384/Role-Genetics.htm (13322 words)

	Enloe Quarter Horses Specializing in Grulla Quarter Horses and Grullo Quarter Horses and Dun Factored Performance Horses
		Because dun factor is a dominant characteristic that may not be hidden through generations, some modern breeds have chosen to breed dun factor out of the standard.
		Although a dun factored horse may carry the creme gene, it is not required and may not be visible to the eye.
		Dun factor does not appear to be passed on as a "group", meaning if both sire and dam have a transverse stripe, the resulting dun factored foal carrying a dorsal stripe may not.
	www.enloequarterhorses.com /inform6.php (1101 words)

	Ragtime Morgans: The Dun Gene (Site not responding. Last check: 2007-10-28)
		Please note: when the DUN gene is accompanied by a CREME gene in the same individual, the stripes are muted to a much lighter shade -- as in the two stallions, Mr Alert and Ragtime, and also in Razzle Dazzle.
		When the DUN gene is present alone without a creme gene, the result is a much darker expression of the stripes.
		Dun is the most misunderstood dilution, and we have established a new publication for the Morgan breed called " Been There - Dun That " -- email for subscription information.
	www.vicspdi.com /ragtime/dungene.html (664 words)

	[No title]
		Other dun traits that not every horse will show are outlining and/or barring on the ear, a spider web design on the forehead, a lower face mask (all in the darker, base color), and lighter hairs at the top and sides of the tail and edges of the mane ("guard hairs").
		Although the Dun gene does dilute fl pigment, it tends to leave the points undiluted for the most part, so the legs, mane, and tail will still be fl.
		A fl horse with a Dun gene is commonly called a Grulla or Grullo.
	www.horsecolor.com /dilutions/dun/index.html (813 words)

	The Dun gene
		DUN horses are those that have a dilution gene at the dun locus, a completely different and separate dilution gene from the CREME gene responsible for palomino and buckskin.
		Add the creme gene, and the palette of colors is lightened and shaded to include a whole plethora of wonderful more pastel shades.
		He is a zebra dun carrying a cream gene as well.Thus in addition to the shades of dun mentioned above, he can pass on both the creme and the dun genes.
	www.ragtime-morgans.com /the%20dun%20gene.htm (907 words)

	Bay Mini Horse
		Many modifying genes produce various shades of bay horses, some like the red bay, or blood bay; the sandy bay, the mahogany bay, etc. are due to sooty, shade, pangare and other modifiers.
		Genes like the cremello gene which when present in the heterozygous form produces the buckskin and when homozygous the gene produces the perlino.
		The dun gene is very similar to the cremello gene in that it dilutes the coat color but not the point color, it produces lineback duns that look very similar to buckskins.
	www.unicornerfarm.com /bayhorse.htm (435 words)

	Dun Factors : Horse Genetics
		The dun gene, besides diluting the body color, will create a number of 'primitive marks', or 'dun factors' on dun horses.
		Some dun horses will have a smudge of darker hair over the crest of the neck or in the hollow of the neck.Some will also have bars or stripes on the neck.
		Dun will also create "sandwich manes", where the middle is very dark and the outer hairs very light.
	www.ultimatehorsesite.com /colors/dunfactors.html (644 words)

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