Editing Basic Color Genetics
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Genotype is the black and white formula on the gene that makes a color. Phenotype ignores the genetics and says "it just looks like this one so that is how I will describe it". The standard uses Phenotype. But it is important to understand genotype when breeding. | Genotype is the black and white formula on the gene that makes a color. Phenotype ignores the genetics and says "it just looks like this one so that is how I will describe it". The standard uses Phenotype. But it is important to understand genotype when breeding. | ||
===A-Agouti=== | ===A- Agouti=== | ||
[[File:Geneiticx3_A_loci.jpg|thumb|A loci]] | |||
The Agouti gene has three variable Alles. | |||
The Agouti gene has three variable | Agouti is the most dominate followed by Tan, and then Self is the most recessive. | ||
Agouti locus's - expresses the "wild color" which is the banding of the individual hairs. Agouti is the most Dominate of the three Alleles present on Gene Marker "A". Agouti presents as individually stripped hairs , with bands along each hair shaft. This will create a color ring when you blow into the coat. Standard basic Agouti colors are Chestnut also called castor, sandy, copper ,ect depending on what breed you are referring too, and Chinchilla, also called Squirrel, or depending on the base pigment color that presents along with Agouti these base patterns have different names, I will cover this more when we get to the B loci. Other Agouti based colors that have the banding modified by other genes, markers, and modifiers, are Red, Steel, Harlequin and Ermine | |||
Tan coloration is self Eumelanin on top , and pheomelanin on bottom. The pattern is typically the Eumelanin across the back and ears and face, and the pheomelanin circling the eyes, on the belly from chin to under tail, and the inside of the ears. "at" is dominate to self "a" , but recessive to "A" agouti. similar to how harlequin breaks up the color into distinct patches , "at" is expressing the solid color of the eumelanin on the top portion of the Rabbit , and the Solid color of the pheomelanin on the bottom. | |||
A few Color Patterns that are tan based are ,Tan, Martian, Otter. | |||
Their is a third loci on this gene. "a" is the most recessive Allele on the "A" locus, in order for it to be expressed it has to be Homozygous which mean both alleles on the gene have to have the recessive "a". If the animal has two recessive alleles it will have a solid colored hair shaft. If any other Allele from the "A" locus is present it will dominate the "a" and cancel it out. | |||
The "aa" locus expresses itself as a "self" colored rabbit, a "self " colored rabbit is as usually solid color rabbit that is expressive it's base color as controlled by the B locus , and sometimes modified by the D and "e" locus which we will cover in detail later. Some examples of Self colored rabbits , are Black, Chocolate, Lilac, Blue, and Tort rabbits. | |||
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"C" Full color is Dominate, The first Allele on the Coverage Color marker is "C" Full color. This is the dominate coverage marker and expresses the rabbits full color Eumelanin (B) all over the body. This gene can be modified by recessive genes at "at", "d", "e" and "En" to name a few. Some examples of Full Color Expression that allows the base color to be seen and produce your Solid Chocolate, Blacks, Blues, Lilacs, Chestnuts, Steels, and Harlequins, and will be expressed as shading on torts. | "C" Full color is Dominate, The first Allele on the Coverage Color marker is "C" Full color. This is the dominate coverage marker and expresses the rabbits full color Eumelanin (B) all over the body. This gene can be modified by recessive genes at "at", "d", "e" and "En" to name a few. Some examples of Full Color Expression that allows the base color to be seen and produce your Solid Chocolate, Blacks, Blues, Lilacs, Chestnuts, Steels, and Harlequins, and will be expressed as shading on torts. | ||
[https://mmcrabbits.com/BCWiki/index.php/Light_Chinchilla "cchd" or "chd" is Dark Chinchilla,] The second Allele on the Coverage Color marker is "chd" Dark Chinchilla. This coverage marker strips most of the pheomelanin (red/yellow) and it turns grey/white while leaving the eumelanin (B) (black/chocolate) alone. chd mostly effects rabbits who are Agouti dominate coat types. and can hide on self rabbits, "tan" rabbits who exhibit chinchilla genes will have whiter bellies and ear instead of tan, and are called martins or foxes. This gene can be modified by recessive genes at "d", "e" and "En" to name a few. Some examples of Chinchilla Color Expression that allows the base color to be seen but Masks the pheomelanin , produce your Martin, Fox, Ermine, Chinchilla, Silver Tipped Steels, and Magpies, and will be expressed as shading on Sallander | [https://mmcrabbits.com/BCWiki/index.php/Light_Chinchilla "cchd" or "chd" is Dark Chinchilla,] The second Allele on the Coverage Color marker is "chd" Dark Chinchilla. This coverage marker strips most of the pheomelanin (red/yellow) and it turns grey/white while leaving the eumelanin (B) (black/chocolate) alone. chd mostly effects rabbits who are Agouti dominate coat types. and can hide on self rabbits, "tan" rabbits who exhibit chinchilla genes will have whiter bellies and ear instead of tan, and are called martins or foxes. This gene can be modified by recessive genes at "d", "e" and "En" to name a few. Some examples of Chinchilla Color Expression that allows the base color to be seen but Masks the pheomelanin , produce your Martin, Fox, Ermine, Chinchilla, Silver Tipped Steels, and Magpies, and will be expressed as shading on Sallander | ||
"chlchl" or "chl-" is Light Chinchilla, The third allele on the Coverage Color marker is "chl" Light Chinchilla. This coverage marker strips some of the pheomelanin (red/yellow) and it turns grey/white while leaving the eumelanin (B) | "chlchl" or "chl-" is Light Chinchilla, The third allele on the Coverage Color marker is "chl" Light Chinchilla. This coverage marker strips some of the pheomelanin (red/yellow) and it turns grey/white while leaving the eumelanin (B) | ||
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d is recessive and Dilutees the color . | d is recessive and Dilutees the color . | ||
===E-Extension=== | ===E-Extension=== | ||
[[File:Geneiticx3 E loci | [[File:Geneiticx3 E loci.jpg|thumb|E loci]] | ||
The Extension gene has five separate markers that control the extend of the band of an Agouti rabbit. Ed dominate black the rabbit will appear self as it will extend the color at B to entire hair follicle, Es steel is the second most dominate color, this extends the color at the B loci almost to the tip on an agouti rabbit, so the follicle will be soil 3/4 of the way to the tip with just the tip showing a red/yellow/white coloring. , E-regular extension, this will preset the hair as it is, and Agouti rabbit will have banded color along the hair shaft, and a self or tan rabbit will have a soil hair coloration. ej-Japanese harliquen is a co-dominate recessive gene that expresses patches of alternating color, or Bridling on Agouti coats. ee-is non-extension, it is the opposite of dominate black and hide the color at B on Agouti rabbit extending the tip color to the base . and blocking out all Eumelanin. | The Extension gene has five separate markers that control the extend of the band of an Agouti rabbit. Ed dominate black the rabbit will appear self as it will extend the color at B to entire hair follicle, Es steel is the second most dominate color, this extends the color at the B loci almost to the tip on an agouti rabbit, so the follicle will be soil 3/4 of the way to the tip with just the tip showing a red/yellow/white coloring. , E-regular extension, this will preset the hair as it is, and Agouti rabbit will have banded color along the hair shaft, and a self or tan rabbit will have a soil hair coloration. ej-Japanese harliquen is a co-dominate recessive gene that expresses patches of alternating color, or Bridling on Agouti coats. ee-is non-extension, it is the opposite of dominate black and hide the color at B on Agouti rabbit extending the tip color to the base . and blocking out all Eumelanin. | ||
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E is the third most dominate gene , It expresses Regular Extension, or normal expression of the colors at the A and B loci | E is the third most dominate gene , It expresses Regular Extension, or normal expression of the colors at the A and B loci | ||
ej Harlequin characterized by alternating patches of banding. These rabbits look Brindled or patched, in the harlequin Breed, the Color is preferred to have a Perfectly Split face between the pheomelanin and eumelanin sides, with the opposite ear colored, and again the opposite front legs, Ideally the rabbit will have a clean checker board like pattern . Very Clean Harlequins with have densely colored coat with clean patches but in co-dominants rabbits bridling and mudding of the patches is common. "ej" expresses itself in 2 base colors | ej Harlequin characterized by alternating patches of banding. These rabbits look Brindled or patched, in the harlequin Breed, the Color is preferred to have a Perfectly Split face between the pheomelanin and eumelanin sides, with the opposite ear colored, and again the opposite front legs, Ideally the rabbit will have a clean checker board like pattern . Very Clean Harlequins with have densely colored coat with clean patches but in co-dominants rabbits bridling and mudding of the patches is common. "ej" expresses itself in 2 base colors. | ||
Magpie, which is a Chinchilla based coat meaning the coat is stripped of the pheomelanin and presents as White, with Black or Chocolate based patches. | Magpie, which is a Chinchilla based coat meaning the coat is stripped of the pheomelanin and presents as White, with Black or Chocolate based patches. | ||
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e Tort/ non-extension the opposite of the Steels with the light part of the Agouti hairs extended to the base. Non-extension strips out the eumelanin from the agouti coat and presents as a yellow/red solid colored rabbit, but it is common for these rabbits to still show the creamy/white underbelly that distinguishes the Agouti. | |||
A Tort is a Self colored rabbit at A, " aa" and it expressed as a Reddish solid coat since the pheomelanin masks the Color at A, but they tend to express the eumelanin with darker points. similar to the Himalayan points, their Nose, Ears, | A Tort is a Self colored rabbit at A, " aa" and it expressed as a Reddish solid coat since the pheomelanin masks the Color at A, but they tend to express the eumelanin with darker points. similar to the Himalayan points, their Nose, Ears, Feet and Tail will be shaded darker. | ||
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Characterization of the rabbit agouti signaling protein (ASIP) gene: Transcripts and phylogenetic analyses and identification of the causative mutation of the nonagouti black coat color | Characterization of the rabbit agouti signaling protein (ASIP) gene: Transcripts and phylogenetic analyses and identification of the causative mutation of the nonagouti black coat color | ||
https://www.sciencedirect.com/science/article/pii/S0888754309002559 | https://www.sciencedirect.com/science/article/pii/S0888754309002559 | ||