CDCB delivers the latest news on genetic improvement, research and U.S. evaluations through its monthly newsletter, dairy media, and events.
December 2021: Changes to Evaluation System
Kristen Parker Gaddis and Paul VanRaden
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.
Mahesh Neupane and Kristen Parker Gaddis and Paul VanRaden and Rob Tempelman
August 1, 2021
The new Lifetime Net Merit (NM$) including Feed Saved (FSAV), Heifer Livability (HLIV) and Early First Calving (EFC), along with a number of new parameters and
assumptions, will be introduced in the August 2021 evaluation.
The August 2018 NM$ 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.
Jay Megonigal and H Duane Norman and Kristen Parker Gaddis and Paul VanRaden
April 1, 2018
Official genetic and genomic evaluations for resistance to six health events in Holsteins (Hypocalcemia, Displaced abomasum, Ketosis, Mastitis, Metritis, Retained
placenta) will be first published in April 2018. These traits are six of the most common and costly health events impacting dairy herds.
Leigh Walton and Rohith Shetty and Jana Hutchinson and Jay Megonigal and Ezequiel Nicolazzi and H Duane Norman and Kristen Parker Gaddis and Paul VanRaden and George Wiggans and Dan Null and John Cole
December 1, 2017
Starting December 2017, the CDCB will publish the second Ayrshire haplotype affecting fertility. The publication of this important information for the Ayrshire breed
is possible thanks to the research led by AGIL researches and the cooperation with CDN, who confirmed the preliminary results obtained in the US population.