The Spring 2017 EPDs were released on 12/22/16 including a Multi-breed Stayability prediction using BOLT and single step genomic evaluation (evaluating the genomics, pedigree, and phenotype information in one process rather than blending in the genomics later). This marks the first EPD predictions with BOLT, the new genetic evaluation software developed by Theta Solutions, with Drs. Bruce Golden and Dorian Garrick. The ASA will continue to work towards using BOLT and single step genomic evaluation for the full suite of EPDs in 2017.
In addition to using BOLT and single step, the stayability EPD uses a random regression approach to predict stayability developed by Dr. Janusz Jamrozik and colleagues from the University of Guelph and the Canadian Simmental Association. Dr. Scott Speidel at Colorado State University, Dr. Bruce Golden, and the genetics team at IGS (Lauren Hyde, Wade Shafer, Mahdi Saatchi, and Steve McGuire) worked together to incorporate the new methodology into the IGS evaluation.
The new stayability evaluation:
- Includes data on animals of varying breed composition
- Uses single step genomic evaluation – the industry’s first!
- Produces true accuracy values
- Provides stayability EPDs to all IGS partners on a common base.