Agouti Based Coats + DFP1

How Sooty and Dense Pheomelanin influence shade and expression of DFP1 on Bay and Brown Based Coats.

Bay Dun Brindle (E/e, A/A, D/-, DFP1/DFP1)

Looking at the chart below, as we add darkening genes like Sooty and Dense Pheomelanin, the horses coat becomes darker and the Dun Factor markings become more expressed. However, if it becomes too dark, the Dun Factor begins to get lost due to the Dappling caused by having 3 or more Darkening Genes. 

Examples of Darkening Genes

no modifiers	with Sty/-
with Sty/Sty	with DP/-
with DP/DP	with Sty/-, DP/DP
with Sty/Sty, DP/-	with Sty/Sty, DP/DP

Bay Dun Brindle with Sooty Plus (S+)

Sooty Plus (S+) shifts around pigment to give a dappled look. This pigment shift, while darkening the horse, can distort the appearance of Dun Factor.

Examples of Sooty +

with S+/S+

with S+/S+, DP/DP

Bay Dun Brindle with Pangare Plus (P+)

Pangare Plus (P+) lightens the soft points of a horse, covering up some of the expression of Dun Factor.

Examples of P+

with P+/-

with Sty/-, DP/-, P+/-

Bay Dun Brindle with Dilution Genes

Diluting genes change the intensity of pigment on a horse. This weakens the expression of Dun Factor, and in some cases it can be invisible. 

Examples of Dilution Genes

with Sty/-, DP/-, Cr/-	with Sty/-, DP/-, Ch/-
with Sty/-, DP/-, Prl/Prl	with Sty/-, DP/-, Z/-