The implementation of genomic evaluations in the UK
Preliminary genomic evaluations for production and fitness traits in Holstein Friesian bulls in the United Kingdom (UK) were undertaken using 11480 bulls with 50k genotypes. A linear model with and without polygenic effects was implemented and results were compared. Linear equations were solved with Mix99. The accuracy of predictions in terms of correlations between deregressed proofs and direct genomic values in the validation set were about 0.68 for production traits and somatic cell count (SCC) but lower at 0.45 for longevity. Inclusion of polygenic effects increased the regression coefficients to about unity, thus improving the predictive ability of the model. The gain in reliability in genomic enhanced pedigree index (GPI) relative to traditional PI were about 23% for production traits and 15% for longevity.
- 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).