Convergence behavior of single-step GBLUP and SNPBLUP for different termination criteria

Abstract Background The preconditioned conjugate gradient (PCG) method is the current of choice for iterative solving genetic evaluations. relative difference between two successive iterates and residual system equations are usually chosen as a termination criterion PCG in animal breeding. However, our initial analyses showed that these commonly used criteria may report applied to single-step single nucleotide polymorphism best linear unbiased prediction (ssSNPBLUP) not converged yet, whereas solutions accurate enough practical use. Therefore, aim this study was propose have been (partly) developed other fields, but new breeding, compare their behavior widely breeding ssSNPBLUP. convergence patterns ssSNPBLUP were also compared genomic BLUP (ssGBLUP). Results Building upon previous work, we take properties into account. These directly related error with respect true solutions. Based on pig dairy cattle datasets, show coefficient matrices ssGBLUP similar when using second-level preconditioner similarly based This observed both proposed criteria. was, however, case defined Conclusion Our results can converge ssGBLUP. always depicted behaviors, recommend them comparing different models routine