AHDB Dairy Introduces Genomic Testing for Cross-Bred Dairy Herds

Genomic testing for cross-bred dairy herds is now possible due to AHDB Dairy's new genotyping method, which utilizes female genotypes fr om cross-bred cows. The evaluations are obtained through AHDB's single-step genotyping method.

Richard Miller, NMR genomic product strategy manager, highlighted the reliability of the data, stating, "This large volume of available data provides AHDB Dairy with enough information to check and confirm the reliability of cross-bred genomic tests." The genomic results are accessible between six and eight weeks after sampling.

These results are published on AHDB's genetic herd report and can be accessed through NMR's Herd Companion website, which provides producers with the capability to rank and analyze results. According to Mr. Miller, "Producers can rank all animals, cows and heifers, and they can also use the reporting system to set individual trait thresholds wh ere required."

The system calculates a spring- or autumn-calving index for each animal, allowing comparisons regardless of breed composition. Both indexes integrate production and health traits, ensuring selection favors the most profitable animals.

Testing can be conducted shortly after birth, using genotype tags or tissue sampling units from NMR. These are used to collect tissue samples, which are then sent for testing. The GeneEze cross-breed genomic test costs £22.50 per test, identical to the cost for pure breed animals.