Three selection indexes were constructed for bulls of beef cattle: IM for terminal crossing (in dairy herds), IZ for the selection of foundation sires for beef herd and IS for the selection of bulls for beef herd. The sources of information were breedingvalues routinely calculated in performance testing. The reliability of partial breeding values ranged from 11% to 36%. Reliability influences subsequent accuracy of index selection for total genotype. Index selection was expressed almost exclusively ingenetic gain of direct effects while maternal effects were of only small importance in the breeding objective. Direct effects for daily gain until weaning and after weaning are of the highest importance in the breeding objective. The most important information sources in selection indexes are direct effect of weaning weight and maternal effect of weaning weight.