Use of GMO hybrids may help growers improve weed and insect control in corn as well as reduce costs of pesticide applications. GMO traits cost more compared to normal hybrids. Farmers are concerned about “yield drag” or “yield lag” in GMO corns. Several factors may contribute to lower yields in GMO corn. The conversion of normal corn to a specialty hybrid requires numerous cycles of backcrossing. The time that is required to complete the backcross process may result in GMO hybrids lagging behind that of the normal hybrid from which it is derived. Second the conversion of normal hybrids is not always “clean.” Sometimes undesirable agronomic traits are strongly linked to the gene that conferred the specialty trait and this “linkage” decreases yield performance. The concept of yield drag and yield lag is real and as plant breeders spend more time and resources making sure that GMO traits work, it will come at a cost and yield progress will likely be slowed. Finally, like normal hybrids yield performance variability exists among GMO hybrids.