News
CDCB delivers the latest news on genetic improvement, research and U.S. evaluations through its monthly newsletter, dairy media, and events.
What Role Does Inbreeding Play in Genetic Base Changes?
April 3, 2025
Genetic base changes include both corrections for observed genetic trends in the population and adjustments to account for future inbreeding. After the April 2025 base change, observed changes in Predicted Transmitting Abilities (PTAs) for individual animals may not match the base change values as closely as they have in the past. This is not due to any errors in the evaluation. It reflects Expected Future Inbreeding (EFI) changes in the population that are larger than they’ve been in the past.
August 2024 Changes: Impact on Evaluations
August 13, 2024
In the August 2024 evaluations, implemented changes had effects on all yield traits (Milk, Fat and Protein) and Heifer Livability, along with correlated traits of Productive Life and Cow Livability in some cases. Breed Base Representation (BBR) values were updated, with the annual reference population update and introduction of a revised SNP list.
Announcing QDisc
February 10, 2023
CDCB announces a new service, QDisc, or quick discovery of close relatives. This quick-turnaround service uses the ICAR-defined parentage SNP to discover close relatives.
April 2022: Changes to Evaluation System
April 4, 2022
Three times a year, genetic evaluations are calculated for all the dairy animals in the U.S. database.
August 2020: Changes to Evaluation System
August 1, 2020
April 2020: Changes to Evaluation System
April 1, 2020
December 2019: Changes to Evaluation System
December 1, 2019
April 2019: Changes to Evaluation System
April 1, 2019
CDCB Connection
A monthly newsletter, details genetic evaluation updates and industry news.
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