Looking at lifetime energy-corrected milk (ECM), comparing the top quartile to the bottom quartile, the highest scored cows produced 13,389 more pounds of ECM across their lifetimes than cows in the bottom quartile (refer to Figure 2). Using a long-term milk price, of $20/cwt, this difference represents $2,678 more in gross milk revenue per cow over the course of their lives. Among individual linear classification traits udder and feet and leg traits were most corelated with milk yield and longevity measures. Additionally, when look at lifetime days in milk (DIM), cows in the top quartile for final classification score had 142 more lifetime DIM than cows in the bottom quartile.

This large dataset provides new insight into the importance of physical conformation to production and longevity. These results also show that linear classification does quantify economically important physical conformation traits well. As the dairy industry focuses sustainability, breeding cows that last longer is increasingly important. These results demonstrate the importance of selection for functionally correct dairy cows for dairy profitability.
If you are interested in seeing more information about individual traits, you can find a compete report with all analyses at www.holsteinusa.com/typematters. Contact Holstein USA Analytics and Innovation Scientist Jeffrey Bewley by email at jbewley@holstein.com or call 859.699.2998 for questions or further information.
Source : Holstein USA