News
CDCB delivers the latest news on genetic improvement, research and U.S. evaluations through its monthly newsletter, dairy media, and events.
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.
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.
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.
August 2021: Changes to Evaluation System
August 1, 2021
The new Lifetime Net Merit (NM$) including Feed Saved (FSAV), Heifer Livability (HLIV) and Early First Calving (EFC), along with a number of new parameters and assumptions, will be introduced in the August 2021 evaluation.
December 2020: Changes to Evaluation System
December 1, 2020
August 2020: Changes to Evaluation System
August 1, 2020
December 2019: Changes to Evaluation System
December 1, 2019
August 2018: Changes to Evaluation System
August 1, 2018
The August 2018 NM$ update includes genetic evaluations for six new direct health traits first introduced in April 2018 for Holsteins: displaced abomasum, hypocalcemia (milk fever), ketosis, mastitis, metritis and retained placenta.
CDCB Connection
A monthly newsletter, details genetic evaluation updates and industry news.
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- Asha Miles
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- Jim Dickrell for Dairy Herd Management
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- João Dürr, Ph.D.
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- Kaori Tokuhisa
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- Katelyn Allen for Hoard’s Dairyman
- Kent Weigel for Dairy Business
- Kristen Parker Gaddis
- Leigh Walton
- Lillian Bacheller
- Lindsey Worden
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- Murray Hunt for The Bullvine
- National Association of Animal Breeders
- Nick Wu
- Paul VanRaden
- Penn State University
- Rob Tempelman
- Rohith Shetty
- Sophie Eaglen
- Tabatha Cooper
- Taylor Leach for Dairy Herd Management
- Taylor McWhorter
- Tom Lawlor
- USDA Animal Genomics and Improvement Laboratory
- William Luff