Different mating types were evaluated, through simulated data, in populations submitted to selection based on BLUP, during fifty generations. It was considered one quantitative trait with heritability of 0,10. The selected populations had the following data structure: mating ratio values: 10, 20, 25, and 50, numbers of selected males by generation: 10, 5, 4, and 2, and effective population sizes: 36,36, 19,05, 15,38 and 7,84, respectively. In each mating ratio value, the populations were coupled according one of the mating types: preferential mating to half and full sibs, preferential mating between half sibs, random mating, exclusion of mating between full sibs and exclusion of mating to half and full sibs. The genetic parameters evaluated were average phenotypic values and average inbreeding by generation. In the lowest mating ratio value, it was observed better phenotypic performance in all the mating types. The mating types which didn't allow mating between sibs provided higher phenotypic gains and were more effective in controlling the inbreeding, in the short-term selection, although they didn't avoid neither the increasing, nor the inbreeding accumulation, along the generations.
inbreeding; simulated data; long-term selection; effective population sizes
