Estimation of GEBVs using deregressed individual cow breeding values
Abstract
Individual cow breeding values were deregressed using animal model and full national pedigree with 4.579 million animals. The deregressed proofs (DRPs) were used to recalculate the EBVs for their sires. The correlation between recalculated EBVs and original EBVs were 0.9997-1.0000, with small differences in EBVs of bulls without own daughters. Finally, the animal model DRPs were used to solve single-step genomic evaluations utilizing genotypes of 4725 bulls. The single-step approach was implemented using PCG algorithm and iteration on data. The Interbull GEBV test validation reliabilities for milk, protein and fat GEBVs were 0.35, 0.36 and 0.45, respectively. These were on average 0.03 higher than the single-step GEBVs with sire model DRPs. Overall the animal model deregression was computationally inexpensive. Also the single-step approach with 3.40 million cow records and three traits simultaneously took less than 1 hour wall clock time.
Downloads
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
