The objective of this study was to determine the genetic potential of a semi-early maize synthetic with flint type kernel (Sin EEL Flint). The estimation of genetic parameters was obtained with S2 progenies, and the performance of the progenies in hybrid combinations were evaluated. One hundred fourty-two S2 progenies of Sin EEL Flint were used. They were obtained by top crossings with a contrasting heterotic synthetic of dent type kernel. These topcross progenies were tested in a lattice design 12 x 12 with two replications in two locations, Sete Lagoas and Londrina. The selected topcross nº 101, with specific adaptation for Londrina. and nº72, being adapted to both locations, were the best yieldings (PED) with 12069Kg ha-1 and 11068Kg ha-1, respectively. Values of the estimated parameters for <IMG SRC="/img/revistas/cr/v33n4/16678s03.gif">, CVg and h² were similar to those found in other studies conducted in tropical conditions. It was observed that this synthetic has enough genetic and potential variability to inbred line extraction for hybrid production and to be used as germoplasm source in breeding programs.
interpopulation genetic parameter; yield; Zea mays L.
