Click here for Price and Turnaround Time
Phenotype: Multiple congenital ocular anomalies (MCOA) is associated with the silver dilution and is characterized by ocular cysts, enlargement of the cornea, abnormally formed iris/retina, and additional abnormalities.
Mode of Inheritance: Incomplete dominance
Alleles: N = Normal/Unaffected, Z = Multiple congenital ocular anomalies; Silver
Breeds appropriate for testing: Appaloosa, Arabian, Ardenne, Finnhorse, Gypsy Cob, Gypsy Vanner, Icelandic Horse/Pony, Kentucky Mountain Horse, Miniature Horse, Missouri Foxtrotter, Morgan Horse, Mountain Pleasure Horse, Norwegian Nordland, Paint Horse, Quarter Horse, Rocky Mountain Horse, Saddlebred, Shetland Pony, Swedish Warmblood, Welsh Pony, related breeds
Explanation of Results:
- Horses with N/N genoytpe will not have multiple congenital ocular anomalies (MCOA) or the silver dilution, and cannot transmit this MCOA variant to their offspring.
- Horses with Z/N genotype will likely develop a less severe form of multiple congenital ocular anomalies (MCOA), and will be silver dilute. They may transmit this MCOA variant to 50% of their offspring. Matings with N/N horses will result in a 50% chance of producing a foal that will likely develop a less severe form of MCOA.
- Horses with a Z/Z genotype will likely develop a more severe form of multiple congenital ocular anomalies (MCOA) and will be silver dilute. These horses will pass down this MCOA variant to all of their offspring. Matings with any genotype will results in a foal that will likely develop some form of MCOA.
Chestnut horses with one or two copies of the MCOA variant will not be silver dilute but are still likely to develop ocular abnormalities/MCOA.