When calculating breeding indices, a base of animals is used to create the average. The base can be fixed, rolling or partly rolling and partly fixed. But what does it mean and is fixed better than rolling or the other way around?
Read more from the paper About the base – fixed or rolling?
NAV has investigated thoroughly the calculation of yield breeding values and made corrective actions to avoid similar situations in the future.
Read more from the press release.
The latest NAV routine genomic evaluation took place as scheduled. NAV carried out genomic prediction for Holstein, RDC and Jersey. Genomic breeding values of bulls are updated to NAV Bull Search after each evaluation.
Results from new genetic trait HH2 were added to NAV Bull Search for Holstein. More information about genetic traits is found on NAV homepage.
Read more from the NAV newsletter.
Unfortunately, an error has been detected in the August yield evaluation. Genomic information of some newly genomic tested animals was not correctly processed in the genetic evaluation.
Affected animals constitute from 589 Holstein bulls, 79 Jersey bulls and 7868 Holstein females, whose SNP information was drawn from NAV SNP data base in July. The published genomic breeding values for these animals tend to be overestimated.
New genomic evaluation is now underway and new genomic breeding values will be published 2.9.2025
We apologize any inconvenience this has caused.
The third NAV routine evaluation for this year took place as scheduled. NAV Bull Search has been updated with new EBV’s and GEBV’s.
NAV Beef Search is also updated with new beef x dairy breeding values.
In this evaluation weight factors were slightly modified in udder index for RDC. There is now more emphasis on teat length and thickness, while the weight on udder depth has been slightly reduced. Read more about the changes from a paper Fine-tuning of the udder index in RDC.
Read more from the NAV newsletter.
New Interbull breeding values are updated to NAV Interbull Search.