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?

John Cole

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.


Constructed ID’s: Eliminating Pedigree Dead Ends

Lillian Bacheller and José Carrillo and Ezequiel Nicolazzi and George Wiggans

February 1, 2023

Knowing an animal’s ancestry several generations back is certainly the goal for breeders; however, there are instances where animals have a gap in their pedigree. To fill in more pedigree gaps, CDCB is implementing a new solution starting in February 2023.


More Breeds Need Genetic Evaluations for Stillbirth

H Duane Norman

January 6, 2022

Determining the effectiveness of genetic evaluations for stillbirth in additional U.S. dairy breeds was the research focus for CDCB intern, Anil Sigdel, in summer 2021.


April 2020: Changes to Evaluation System

H Duane Norman and Paul VanRaden and George Wiggans

April 1, 2020


December 2019: Changes to evaluation system

Ezequiel Nicolazzi and Paul VanRaden and George Wiggans

December 1, 2019


December 2019: Changes to Evaluation System

Ezequiel Nicolazzi and Paul VanRaden and George Wiggans

December 1, 2019


April 2019: Changes to Evaluation System

Paul VanRaden and George Wiggans

April 1, 2019


December 2018: Changes to Evaluation System

Lillian Bacheller and Paul VanRaden and Dan Null and Derek Bickhart and John Cole and Ben Rosen and Jeff O’Connell

December 1, 2018


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