Fecha de publicación: 08/11/2018 Fuente: WIPO "pollination" According to the invention, there is provided seed and plants of the hybrid corn variety designated CH320399. The invention thus relates to the plants, seeds and tissue cultures of the variety CH320399, and to methods for producing a corn plant produced by crossing a corn plant of variety CH320399 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH320399.