Horse Coat Color Results with Explanations
- Red Factor
- e/e - Only the red factor detected. Basic color is sorrel or chestnut in the absence of other modifying genes.
- E/e - Both black and red factors detected. Either E or e transmitted to offspring. Basic color is black, bay or brown in the absence of other modifying genes.
- E/E - No red factor detected. Horse cannot have red foals regardless of the color of mate. Basic color is black, bay or brown in the absence of other modifying genes.
- Agouti
- A/A - Black pigment distributed in points pattern. Basic color is bay or brown in the absence of other modifying genes.
- A/a - Black pigment distributed in points pattern. Basic color is bay or brown in the absence of other modifying genes.
- a/a - Only recessive allele detected. Black pigment distributed uniformly. Basic color is black in the absence of other modifying genes.
- Cream
- N/N - No evidence for the Cream dilution altered sequence detected. Basic color is sorrel or chestnut, bay or black in the absence of other modifying genes.
- N/Cr - Heterozygous, dilute, one copy of Cream gene. Typical colors are palomino, buckskin and smoky black in the absence of other modifying genes.
- Cr/Cr - Double dilute (two copies of Cream gene). Typical colors are cremello, perlino and smoky cream in the absence of other modifying genes.
- Pearl
- N/N - No evidence of the altered sequence detected.
- N/Prl - One copy of the altered sequence detected. If Cream dilution is also present, a pseudo-double Cream dilute phenotype will result.
- Prl/Prl Two copies of the altered sequence detected. On a chestnut base color, a uniform apricot color of body hair, mane and tail will result.
- Tobiano
- N/N - No evidence of altered sequence detected. Horse is not Tobiano.
- N/TO - One copy of altered sequence. Approximately 50% of the offspring will inherit Tobiano.
- TO/TO - Two copies of altered sequence. Horse is homozygous for Tobiano. All offspring will inherit Tobiano.
- Dominant White
- N/N No evidence of altered sequence detected.
- N/W10 - One copy of the W10 mutation detected. Horse will display some degree of white spotting but the specific pattern cannot be predicted.
- W10/W10 - Two copies of the W10 gene detected. Homozygous W10/W10 horses may not be viable. This result may only be found in aborted fetuses produced in matings between two WIO carriers. Horse Coat Color Results with Explanations
- Silver
- N/N - No evidence of the altered sequence detected.
- N/Z - One copy of the altered sequence detected. Black-based horses will be chocolate with flaxen or lightened mane and tail. Bay-based horses will have lightened black pigment on lower legs, mane and tail. No effect on chestnut color.
- Z/Z - Two copies of altered sequence detected. Black-based horses will be chocolate with flaxen or lightened mane and tail. Bay-based horses will have lightened black pigment on lower legs, mane and tail. No effect on chestnut color.
- Lethal White Overo
- N/N No evidence for the altered sequence detected.
- N/O - One copy of the altered sequence detected. If bred to another N/0 horse, there is a 25% chance of producing a lethal white overo foal. The N/O type has been detected in Paints (including breeding stock), Pintos, Thoroughbreds, Miniatures, Quarter Horses and Tennessee Walking Horses.
- O/O - Only the altered sequence in the EDNRB gene detected. This result has only been obtained with samples from lethal white overo foals.
- Sabino 1
- N/N - No evidence of altered sequence detected.
- N/SB1 - One copy of the Sabin° 1 gene detected. Horse typically may have 2 or more white legs, blaze, spots or roaning in the midsection and jagged margins around white areas.
- SB1/SB1 - Two copies of the Sabino 1 gene detected. Complete or nearly complete white phenotype expected.
- Champagne
- N/N - No evidence of altered sequence detected.
- N/Ch - One copy of the altered sequence detected. Chestnut color (red) is diluted to gold, bay to tan with brown points and black to darker tan with brown points.
- Ch/Ch - Two copies of the altered sequence detected. All offspring are expected to be Champagne diluted.
- Gray
- N/N - No copies of the gray gene. Horse will not turn gray.
- N/G - One copy of the gray gene. Horse will turn gray and approximately 50% of offspring will be gray.
- G/G - Two copies of the gray gen be gray. Horse will turn gray and all offspring will be gray.
- Splashed White
- SW-1
- N/N - No copies of SW-1 mutation.
- N/SW1 - Horse has one copy of the SW-1 mutation.
- SW1/SW1 - Horse has two copies of the SW-1 mutation.
- SW-2
- N/N - No copies of SW-2 mutation.
- N/SW2 - Horse has one copy of the SW-2 mutation.
- SW-3
- N/N - No copies of SW-3 mutation.
- N/SW3 - Horse has one copy of the SW-3 mutation.