Fig. 1: Coat patterns controlled by ASIP.
From: Dog colour patterns explained by modular promoters of ancient canid origin
Drawings of the five pattern types caused by ASIP regulatory variation are shown on the left, with representative photographs shown on the right. A completely black coat caused by homozygosity for ASIP loss-of-function is not shown. Within each pattern type, there may be variation due to other factors including: (1) the position of the boundaries between pheomelanic and eumelanic areas, for example in black saddle or black back; (2) the shade of pheomelanin (red to nearly white); (3) presence of a black facial mask or white spotting caused by genes other than ASIP; and (4) length and/or curl of hair coat. Patterns are displayed in order of dominance.
