Figure 3.

Bay mushroom Shetland Ponies. (A–C) Three bay ponies homozygous for the mushroom variant showing a coat lacking the red hue as typically seen in bay horses without the mushroom dilution. These bay mushroom ponies have normally pigmented mane and tail with countershading on the shoulders neck and head of these ponies. (D) Buckskin homozygous for the mushroom variant. The countershading is consistent with other “bay mushroom” ponies though the combination of mushroom and cream is likely contributing to the lighter shade in the coat of this pony as compared to the other bay mushrooms. Photo credits (A) Maria and Joana Tammi (B) Mira Ruotsalainen (C) and (D) Katrin Lach and Claudia Rahlmeier