Beside the yield, as an economically important trait, the popping volume that breeders have been improving is equally important. At the same time, it is the main trait distinguishing popping maize from other types of maize. In order to provide a successful breeding and selection of popping maize, specific procedures are necessary for the evaluation of the traits selection is performed for (e.g. determination of the degree of popping and flake quality). Breeding of popping maize for improved yield is not a primary aim of breeding. If popping maize hybrids do not have a high popping volume and high quality of flakes, they will not be used in the production no matter how high yielding they are. The yield, the popping volume and the relation of these two equally important traits, were estimated in the trial with popping maize hybrids sown in two locations. According to means for both trial locations, the observed hybrid combinations were ranked for the traits of grain yield and popping volume. Obtained ranks were used to calculate the Spearman shrank correlation coefficients. A gained value is not statistically significant, but it points to a weak dependence between these traits. Achieved results, once again, confirmed the difficulties of the task set before popping maize breeders - to select a hybrid combination with a high yield and at the same with a good popping volume.