Difference between revisions of "Advanced Color Genetics"
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https://www.frontiersin.org/articles/10.3389/fgene.2019.00875/full | https://www.frontiersin.org/articles/10.3389/fgene.2019.00875/full | ||
"""Classical genetic studies carried out in rabbits have suggested that the Extension series in this species is determined by five alleles [30,31,37,38,39,40]. Allele ED determines the dominant black coat color and is caused by one in-frame deletion of 6 bp (c.280_285del6 or D6 allele), which eliminates two amino acids in the second transmembrane domain [41]. The black color of the spots of the Checkered Giant breed is due to this allele. Allele ES (steel) is considered a weaker version of ED, even if it could be probably determined by the same mutation causing ED, as another MC1R variant associated to this allele has not been described so far""" | |||
https://www.mdpi.com/2076-3417/11/1/373/htm | https://www.mdpi.com/2076-3417/11/1/373/htm | ||
==*Vm - Vienna== | ==*Vm - Vienna== | ||
Revision as of 13:47, 11 November 2022
More Advanced Color Genetics:
BROKEN LOCI
- En-broken
The broken Pattern is dominate to solid. Rabbits with two Broken Geans are called Charlies and should be only very carefully bred. The Broken gene when homozygous (doubled up) carries a 70% probability of producing a Rabbit with megacolon, a digestive tract disorder.
Vienna
- V-Vienna
Vienna is most frequently known for Blue eye white as two copies of "vm" will produce a solid white rabbit with blue eyes. Vienna is a co-dominate gene, and a "Vmvm" rabbit is a Vienna carrier, in this case some random white markings can bleed through including the brilliant blue eye color in one , part of or both eyes.
Wideband
- W-Wideband
Wide band is a trait modifier gene that will effect Agouti based rabbits. the wide band gene extends the band coverage, primarily on Chestnuts, Reds, and Chinchillas. a chestnut will have a larger area of Pheomelanin showing on the coat and less white, and more red/yellow on it's belly(Coppers), a Chinchilla will have more white on it's coat and more white on it's belly, and a red will have a more solid red belly extended from it's back. Wide band high rufus reds and chestnuts are the most sought after to improve color in a new Zealand red program.
Dutch
- Du-Dutch
Silver
- Si-Silver
Silver gene is indicated by full solid white hairs from root to tip evenly inter mixed with the body color hairs .
Modifiers
Modifiers are not gene on their own but the extent of coverage that rabbit is presenting.
Intensity of Red
The intensity of Red is a gene modifier that controls how saturated the Pheomelanin is in a rabbits coat. We refer to this as Rufus. A rabbit with very little intensity can look almost like a dirty white, while a Rabbit with extremely high Rufus can present as a deep mahogany maroon color. Rufus can also play a role in the quality of other coat colors becuse it turns up the saturation on pigments in the hair follicle. example: a truly rich inky black rabbit has a high Rufus, while a low Rufus Rabbit will appear a duller more charcoal black.
Extent of Broken Pattern
- "Charlie "
- Broken
- Blanket
- Booted
co-dominate, cryptic and ghost presentations of colors:
Genes that are partially dominate even when recessive and Genes that present more intense when doubled up ie produce "phantom" colors , colors that present as something they aren't.
*ej- Harlequin
Harlequin *ej* can bleed through on self "aa, Eej " Chinchilla "A, chd, Eej" Chestnut " A, Eej " . "ej" paired with Steel (Es) can produce a phantom Black rabbit or super steel. Where there may only be a hint of a barred pattering in the tips of the hairs, looking closely you may see some intersperses gold or while tips or barring visible around the belly or in direct sunlight, but at a glance the rabbit may appear to be solid black.
*chl- Chinchilla Light/Shaded
chlchl = seal a more intense shaded pattern chdchl =
*ES- Steel
"EsEs" "Ese" & "Esej" can present as Black
ABCDEsEs
ABCDEse
ABCDEsej
Can all present as soild black .
*Ed -Dominate Black
Black can present on Agouti based rabbits due to other genes effects on coat pattern ie :ABCDEd , Ed dominate black extends the Eumelanin band on an agouti rabbit fully from root to tip, masking any pattern banding and presenting as a self black rabbit. This can be tricky to figure out. Breed your suspected Ed rabbit to a few self rabbits and if you produce a chestnut or agouti pattern one of them is a Cryptic Self, with Ed. is can also be tested with a red gene but will be a little more difficult swapping back and forth to figure out the genotype via color testing. .
https://extension.oregonstate.edu/gallery/rabbit-coat-color-genetics-gallery
https://thenaturetrail.com/rabbit-genetics/color-e-extension-series-steel-tricolor-locus/
https://www.frontiersin.org/articles/10.3389/fgene.2019.00875/full
"""Classical genetic studies carried out in rabbits have suggested that the Extension series in this species is determined by five alleles [30,31,37,38,39,40]. Allele ED determines the dominant black coat color and is caused by one in-frame deletion of 6 bp (c.280_285del6 or D6 allele), which eliminates two amino acids in the second transmembrane domain [41]. The black color of the spots of the Checkered Giant breed is due to this allele. Allele ES (steel) is considered a weaker version of ED, even if it could be probably determined by the same mutation causing ED, as another MC1R variant associated to this allele has not been described so far"""
https://www.mdpi.com/2076-3417/11/1/373/htm
