Table 3.

Mean and standard deviation of inbreeding coefficients (Froh) calculated from runs of homozygosity (ROH) with minimum length of 2 (ROH > 2), 4 (ROH > 4), 8 (ROH > 8), and 16 (ROH > 16) Mb for the three groups. Between brackets is the number of animals in the classes.

	Froh
Group	General Mean	ROH > 2 Mb	ROH > 4 Mb	ROH > 8 Mb	ROH > 16 Mb
Historic Dutch Friesian	0.169 ± 0.095 ab (12)	0.081 ± 0.061 ab (11)	0.058 ± 0.034 (9)	0.019 ± 0.012 (9)	0.010 ± 0.005 (3)
Recent Dutch Friesian	0.243 ± 0.062 a (12)	0.132 ± 0.066 a (12)	0.078 ± 0.055 (12)	0.035 ± 0.028 (11)	0.011 ± 0.007 (5)
Recent Dutch Friesian	0.130 ± 0.067 b (12)	0.047 ± 0.036 b (10)	0.031 ± 0.022 (7)	0.019 ± 0.013 (5)	0.012 ± 0.005 (2)

^{a, b} Different letters within a column indicates significant differences at p < 0.05.