... back pedigree information, the reduction of genetic variance alongselection was obvious, when, for instance, the heritability values estimated inG4, G8 and G12 were 0.37, 0.28 and 0.17 in line ... lines L1 and L2, respectively. The estimated breeding values with the animal model followed a yearly increase of0.46 ± 0.02 (R2= 0.98) and 0.43 ± 0.01 (R2= 0.98), for lines L1 and L2,respectively, ... effects of selection on estimated parameters, such as geneticdrift, inbreeding and gametic disequilibrium. In the present work, all the information was included, but the estimated heritabilities...