Table 2 Mean and standard deviation (SD) of prediction and bias of estimated breeding values (EBV) over 10 replicates from repeated individual measurements and group measurements based on different grouping and drop out scenarios1
r0.858 (0.019)0.859 (0.019)0.829 (0.023)0.676 (0.052)0.677 (0.050)0.671 (0.052)0.707 (0.043)0.707 (0.043)0.701 (0.044)0.629 (0.058)0.635 (0.060)0.622 (0.058)
b11.004 (0.013)1.006 (0.014)1.113 (0.023)1.009 (0.031)1.005 (0.035)1.152 (0.052)1.019 (0.031)1.016 (0.032)1.149 (0.038)0.990 (0.019)0.992 (0.020)1.180 (0.055)
  • 1 Medium within and across pen genetic relationship (Group3×4): group was consisted of 4 different families with 3 pigs from each family; High within group relationship (Group6×2): all animals from 2 different litters were allocated to a group; Low within group relationship (Group1×12): all animals were from different litters. No_Drop: measurements without drop out animals; Dropran: drop out animals were randomly selected and the drop out time of each drop out animal was sampled from a vector of the integers from 1 to 6 representing the six testing time points; Dropphe: six time intervals were defined based on six testing time points, the number of drop out animals at each interval was sampled from a Poisson distribution with a mean equal to the total size of drop out animals divided by six. Animals were ranked based on their phenotypes at each testing time point, then dropped out based on the number sampled from the Poisson distribution.

  • 2 r: Pearson correlation coefficient between EBVs and simulated breeding values for animals having phenotypic data; b1: regression coefficient of simulated breeding values on EBVs for animals having phenotypic data.