This paper presents the results of eight cycles of selection among and within half-sib families in the IAC-1 maize population. It was obtained an average progress of 1.9% per cycle in grain yield against an expected genetic progress of 8.8% per cycle. For ear index it was estimated an expected genetic progress of 1.5% per cycle if applied the same differential selection index as for yield. Nevertheless it was not done any systematic selection among progenies for this character. The percent of lodging did not alter greatly with the cycles of selection.