High oil maize (HOM) can be used for outstanding sources of food, energy and industrial material because of its enhanced value, although their yields are generally lower than normal oil maize (NOM) hybrids (Lambert et al., 1998 and Wagner et al., 2001). However, the TopCross grain production system (TC system) licensed by DuPont Specialty Grains, which involves a blend of a cytoplasmic male-sterile version of NOM hybrid and a male-fertile version of HOM pollinator, has been used commercially since it can minimize the yield disadvantage of HOM and enhance the quality traits of NOM hybrids (Lambert et al., 1998 and Thomison et al., 2003). Recently, a similar HOM production system called three-effect-utilization system (TEU system) has been popularized in China. In this system, the HOM pollinator has higher yield potential, and the yield of the blends might be higher than that in TC system (Cong and Song, 1998).