Abstract: In 1971,we found a Gynomonoecious in corn at the field of Huhehaote outskirts.The terminal ear of Gynomonoecious corn is simple sex pistillate and its waist ear is grown out of secondary floret.It is a natural mutant by a dominant single "Ts" gene of general plant.The proportion of Gynomonoccism to generalplants is 1:l at the test cross or sister cross generation.It is utilized by usfor breeding.The Gynomonoecism utilization plan are:family selection,great cross plants,back crossing to self-bred,culturing new inbred line(with full-sib or rod row method)and compounding the synthetic variety etc.Especially as heterosis,with new inbred line of Gynomonoecism in corn will be a great future.Besides,it can be made embryonic form of Gramineae crop at the future world.These are all perhap-ses.

Key words: Gynomonoecious maize, Utilization plan