It's Melanin Monday sponsored by Equine Essentials! Use the code 10DGTEN for 10% off your very own Essential Noseband.
This week I want to talk a little bit about brindle. No, I don't mean chimeric brindle (more on that next week!), but instead the only known heritable form of brindle - Incontinentia Pigmenti.
This brindle patterning appears at a glance to be very similar to traditional brindling - vertical "stripes" of color all over the horse's body. However, upon closer inspection, this type of brindling also creates areas of hairlessness, which is obviously not ideal.
The gene for this brindle mutation is dominant, so all embryos that inherit it will express the pathology. However, only females actually get a chance to show off this coat - all males that inherit it fail to be carried to term. As a result, all horses with this gene are female descendants of the original mutant.