Genomic selection is widely used in dairy cattle breeding, but still, single-step models are rarely national evaluations. New computing methods have allowed the utilization of very large genomic data sets. However, an unsolved model problem how to build genomic- (G) and pedigree- (A22) relationship matrices that satisfy theoretical assumptions about same scale equal base populations. Incompatib...

We quantified the potential increase in accuracy of expected breeding value for weights of Nelore cattle, from birth to mature age, using multi-trait and random regression models on Legendre polynomials and B-spline functions. A total of 87,712 weight records from 8144 females were used, recorded every three months from birth to mature age from the Nelore Brazil Program. For random regression a...