Inbreeding slows profitability improvements in herds.
The closer the relationship between sire and dam, the greater the loss in profitability in female offspring. A father/daughter mating will result in an inbreeding level of 25%. For such a mating, the lifetime loss (per two-year-old heifer entering the herd) is around $1,060. A half-sibling mating, which results in 12.5% inbreeding, means a $530 loss in production over the lifetime of the animal (half of the loss of a father/daughter mating).