Interbull Portfolio: Expansion of Traits
Abstract
A total of 10 traits for three trait groups of claw health, metabolic diseases and calving were included in a new research run performed in October 2024 with the aim to expand the multiple across-country evaluation (MACE) portfolio. The traits in each trait group were as follows: digital dermatitis (dde), interdigital dermatitis (idd), interdigital hyperplasia (idh), sole hemorrhage (soh), sole ulcer (sou) and white line disease (wld) for claw health; clinical ketosis (cke), sub-clinical ketosis (sck) and milk fever (mfe) for metabolic diseases and direct gestation length (ges) for calving trait group. Although a total of 13 countries provided data for the six different breeds evaluated internationally, the research run could be performed only for four breeds (Holstein (HOL), Brown Swiss (BSW), Red Dairy Cattle (RDC) and Jersey (JER)) as only one country did provide data for Guernsey (GUE) and Simmental (SIM). The research results for across-countries correlations, international EBVs and reliabilities were all promising for all evaluated traits. Gestation length was included in the Interbull May 2025 test run and subsequently in the official August 2025 routine run as the fifth trait in the MACE calving trait group alongside direct and maternal calving ease and still birth traits. The implementation of claw health and metabolic diseases traits in the MACE portfolio is currently pending a slightly higher participation rate from countries and it is therefore aimed to happen in the near future
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