85 Exploitation of Male Sterility for Heterosis Breeding雄性不育性在杂种优势利用中的应用 The significance abor saving, time saving, cost saving Effective parental control More reliable quality§5 Exploitation of Male Sterility for Heterosis Breeding 雄性不育性在杂种优势利用中的应用 1. The Significance ▪ Labor saving, time saving , cost saving ▪ Effective parental control ▪ More reliable quality