HGG Community Forums

What is needed to have a brown horse is E? aAt or AtAt. Sooty and DP will make the coat darker, but a horse can be brown without either of them.

Here's a non-sooty W1 Ata brown.

Totally Open 2

Here's a homozygous sooty homozygous At brown horse. The effect of At is to restrict the movement of black pigment to the points (A's function). The movement is not as held back when two copies of At are present, hence it is fairly light even with SstySsty. There's also some varnishing and brindle going on.

Candy Apple Treat

Here's a heterozygous Ssty brown.

Vaporous Dreams

Here's a homozygous Ssty brown.

Sorthantos

@Sandy

Homozygous brown with no sooty is phenotypically bay and is color named Bay despite the presence of the brown allele.

@divine--

Het brown with recessive Agouti (Ata or aAt) (and of course E) is always "brown" regardless of whether there are sooty genes or not.

Hom brown requires at least one darkening allele according to my research. Any darkening gene will do--DP, Ssty, S+.

@Cheers: Thanks for that correction. I don't do a lot of specific breeding for brown, although I have a fair number of horses that carry it.

Thank you This is good info I always wondered about brown I think it should go in the gene info part of the forum. Ammit will move it I'm sure :)