Simulated data were used to verify the effect of the connectedness on the average phenotypic value and the additive genetic variance. 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 average phenotypic value, and the largest effect of the connectedness was for small heritability and small progeny size. The connectedness effect on the additive genetic variance was small.
BLUP; genetic evaluation; selection and simulation
