Balanced Performance Index ABV

Balanced Performance Index ABV

(a)

(b)

Figure 28. Mean cows' sire Balanced Performance Index by cow's year of birth for (a) Jersey cows, and (b) Holstein cows (ABV estimates generated on 14th April 2020).

(a)

(b)

Figure 29. Cow's sire Balanced Performance Index values by cow's year of birth for (a) Jersey cows, and (b) Holstein cows; boxes contain the central 50% of values for cows born in each year (ABV estimates generated on 14th April 2020).