Table 3.

Breed group total number of genome positions that display SNP copy number gains and losses

Breeds	N of individuals	SNP CNV		% Unique private CNVa
		gains	losses	gains	losses
Draught	624	7527 (12.06)	6041 (9.68)	1.99	18.66
Warmblood	864	13,133 (15.20)	5591 (6.47)	8.62	19.19
Friesian	266	56,033 (210.65)	7142 (26.85)	10.47	1.43

SNP CNVs compared to the average signal of the reference (Belgian draught horse). The average number of SNP CNVs / group cluster is given within brackets. The percentage of group specific (unique private) SNP CNV gains and losses in the genome are also shown. ^aThe sex chromosomes are not included in the total genome size. Every genome position showed a particular SNP CNV in at least 1% of the samples within breed group