sweet corn hybrids nearly all sweet corn types listed below rely on one of two recessive genes su1 ÒnormalÓ and sh2 ÒshrunkenÓ for endosperm expression quality each type may benefit from isolation from other types within its own group and the resulting cross pollination will not produce field corn kernels su1 group normal sugary sugary enhanced sweet breeds synergistic table sweet triple sweet sh2 group augmented crisp n sweet gourmet sweet multisweet shrunken sh2 summer sweet supersweet xtra tender grand cross pollination between groups or with field or popcorn will produce field corn kernels ...