Table 1.

Mean and standard deviation of de-regressed PTA and de-regressed reliabilities for the phenotypes used ($\overline{\mathit{x}}$ ± sd)

	Holstein		Brown Swiss		Jersey
Traitsa	PTA	REL	PTA	REL	PTA	REL
DCD	7.95 ± 2.40	0.76 ± 0.13	5.32 ± 2.03	0.62 ± 0.17	4.94 ± 1.11	0.39 ± 0.17
MCD	8.02 ± 2.70	0.64 ± 0.15	5.34 ± 1.96	0.56 ± 0.18	5.16 ± 1.99	0.40 ± 0.17
GL	0.57 ± 0.58	0.93 ± 0.13	0.44 ± 0.83	0.74 ± 0.21	0.50 ± 0.55	0.86 ± 0.15
STAT	0.34 ± 1.64	0.85 ± 0.10	0.02 ± 1.67	0.83 ± 0.13	−0.06 ± 1.59	0.85 ± 0.11
STR	0.17 ± 1.47	0.83 ± 0.11	0.04 ± 1.12	0.73 ± 0.18	0.05 ± 1.06	0.80 ± 0.14
RW	0.22 ± 1.58	0.83 ± 0.10	−0.09 ± 1.01	0.70 ± 0.18	0.02 ± 0.99	0.78 ± 0.14
Number of Bulls	8780		505		1818

^aTraits included in this study were: direct sire calving difficulty (DCD), maternal grand sire calving difficulty (MCD), gestation length (GL), stature (STAT), strength (STR), and rump width (RW)