highly significantP < 0.01
The production year, herd, individual ages, age of dam, and sex had highly significant effects on all four traits ( P < 0.01).
The production year, herd, individual ages, age of dam, and sex had highly significant effects on all four traits ( P < 0.01).
A decreasing trend for average inbreeding coefficients was observed from 1993 to 1998 in the inbred animals.