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 Evaluations: What’s New?
July 11, 2024
CDCB and USDA AGIL detail changes implemented for the triannual genetic evaluations on August 13, 2024, including 305-AA as the new standardized yield measurement, full implementation of Constructed IDs, Heifer Livability updates, Brown Swiss Rear Teat Placement trait, new SNP list, annual BBR update and inclusion of HH6 and JNS gene tests in haplotype calculations.
April 2024 Evaluation Changes: What’s New?
March 7, 2024
CDCB and USDA AGIL announce enhancements in the U.S. dairy genetic evaluations on April 2, 2024.
December 2023 Evaluation Changes: What’s New?
November 16, 2023
Changes for the December 5, 2023, CDCB evaluations include updated imputation results for all breeds, new haplotype calls for early onset muscle weakness syndrome in Holsteins, and update to the haplotype calls for cholesterol deficiency in Holsteins.
Brown Swiss Fertility Haplotype BH14
March 7, 2023
BH14 has been added to the list of genomic haplotypes reported in the U.S., following USDA AGIL analysis of records in the CDCB database. Routine publication of BH14 status will support breed fertility improvement by allowing appropriate selection and mating of males and females.
Connecting with Jay Weiker
October 13, 2022
Jay Weiker, Chair of the CDCB Board of Directors, shares the CDCB progress and priorities of the past year in the newly-published 2022 Activity Report.
More Breeds Need Genetic Evaluations for Stillbirth
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.
December 2021: Changes to Evaluation System
December 1, 2021
Genetic evaluations for Residual Feed Intake (RFI) were improved using variance adjustments and a higher estimated heritability. The RFI records are now adjusted to have equal variance across herds and across first versus later parities.
CDCB Connection
A monthly newsletter, details genetic evaluation updates and industry news.
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