2025 Genetic Base Change Values

ZISK
Apr 2
1 min read

To prepare for the genetic base change, CDCB previously released estimated values producers and the industry could anticipate seeing in April 2025.

After imputing new phenotypic data for the April evaluation, the final genetic base change values are below. These numbers are reported as the change in base populations (2015 vs 2020).

The genetic base change occurring with the April 2025 evaluations will not be applied to calving traits – Daughter Calving Ease, Sire Calving Ease, Daughter Stillbirth and Sire Stillbirth. Calving traits are an independent trait group in which the genetic evaluations are reported on an observed (phenotypic) scale. This means that both genetic and phenotypic bases need to be updated during a base change. When these base updates were applied for the April evaluation, unanticipated results were observed. Due to the timing of this discovery, CDCB decided to maintain calving traits in their current base in April. This means that both genetic and phenotypic bases used to calculate these traits in December 2024 will again be applied in April. New phenotypes received in the National Cooperator Database since the December evaluation will be included. CDCB expects to update the bases for calving traits in August after further investigation can be conducted. Maintaining the calving traits’ bases in the April evaluation will not impact any other traits.

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