Table 1. Inbreeding coefficients (diagonal boxes) and genetic relationship coefficients of and among the seven affected stallions calculated from i) pedigree data in bold (upper triangle of the matrix) and from ii) SNP genotyping data in normal font (lower triangle of the matrix).

	Stallion HS30	Stallion HS31	Stallion HS34	Stallion HS32	Stallion HS03	Stallion HS29	Stallion HS33
Stallion HS30	* 2.9%	0.064	0.306	0.194	0.172	0.188	0.184
Stallion HS31	0.014	* 4.0%	0.08	0.056	0.056	0.058	0.060
Stallion HS34	0.331	0.088	* 4.2%	0.202	0.176	0.192	0.194
Stallion HS32	0.130	0.000	0.194	* 4.3%	0.114	0.134	0.130
Stallion HS03	0.164	0.062	0.214	0.097	* 2.2%	0.296	0.116
Stallion HS29	0.149	0.019	0.179	0.093	0.265	* 3.7%	0.126
Stallion HS33	0.143	0.038	0.184	0.065	0.090	0.109	* 3.3%

Stallion code names correspond to the codes in the 5-generation pedigree (Figure S1).

^*The diagonal boxes in bold italics with % that should correspond to self-to-self genetic relationship ( = 1) have been used to show inbreeding coefficients for each of the 7 stallions.