The red factor and agouti panel offers diagnostic tests for these two coat color markers.
 
The extension gene, or red factor, determines whether a horse will have a chestnut base coat color or a black or bay base coat color.
 
The agouti gene controls the distribution of black pigment, and determines whether a horse will have a bay or black base coat color.
 
Mode of Inheritance: Autosomal dominant
Alleles: A = Dominant agouti allele (responsible for bay)
a = Recessive agouti allele (causes black)
 
Explanation of Results:
If black pigment is present, horses with A/A genotype have black pigment restricted to the points. They will transmit the dominant agouti allele to all of their offspring.
If black pigment is present, horses with A/a genotype have black pigment restricted to the points. They will transmit the dominant agouti allele to 50% of offspring and the recessive agouti allele to 50% of offspring.
Horses with a/a genotype will have black pigment distributed uniformly over the body and will transmit the recessive agouti allele to all of their offspring.
 
Please Note: DNA testing services are limited to horses that are registered or have a pending registration.
 
Please Note: All DNA parentage verification and mandatory health testing results, whether purchased through the EBRA or transferred into the EBRA system, will become permanent record, which the documented owner may access at any time upon request. The EBRA is not responsible for providing non-mandatory DNA test results, therefore the release of any additional testing performed by past or present owners must be negotiated between the private parties at time of purchase.