Simulated data were used to verify the effect of the connectedness on the accuracy of progeny and performance tests. The simulated genome was formed from a quantitative trait governed by 500 loci. Significance herd effect (9 herds) by 5% probability F test was simulated. Data sets with 0, 15, 30, 60, 90 and 100% of connectedness for heritabilities 0.10, 0.30 and 0.60 and for different progeny sizes (9, 54 and 90 progenies/sire) were simulated. In each generation nine males were selected and the number of selected females shifted according to the number of progenies considering in each data arrange. The selection was accomplished in ten generations, where the process was repeated 30 times. Data with smaller connectedness reduced the accuracy of both tests and the connectedness was more important for small heritability and small progeny size. The heritability and the progeny size had larger influence in the genetic evaluation than the effect of connectedness.
BLUP; genetic evaluation; selection e simulation
