The heavy emphasis on production (28%), fertility (18%) and health (combined 28%: resistance to mastitis and other diseases and claw health) continues with an increased emphasis on diseases other than mastitis (increase from 2% to 4%) and an increased emphasis on udder conformation (increase from 15% to 18%).
Click here for a recent genoBULLetin article about the hows and whys of these and other changes to the TMI. Scroll to pages 14-15 to read “Updated Total Merit Index for Norwegian Red maintains a strong emphasis on health and fertility.” This article by Gary Rogers gives all the details but has a table of old and new TMI weights for a quick overview.
The TMI for each individual bull is not expected to change much because of this update to the TMI. Check out bulls available for crossbreeding in international markets in the online sire catalog. Most of these bulls will have added many daughters since the February 2015 genetic evaluation in Norway.
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