5. Pathways(Ways )of Heterosis Exploitation 种优势利用的途径 The ways refer to the systems applied in seed production Fertility regulating Mechanism in Plant (1)Manual or mechanical control (2)Genetical control (Incompatibility; Ms) 3)Chemical control5. Pathways (Ways ) of Heterosis Exploitation杂 种优势利用的途径 The ways refer to the systems applied in seed production ▪ Fertility Regulating Mechanism in Plant (1) Manual or mechanical control (2) Genetical control (Incompatibility; MS) (3) Chemical control