Fecha de publicación: 16/07/2019 Fuente: WIPO "pollination" According to the invention, there is provided seed and plants of the hybrid corn variety designated CH803657. The invention thus relates to the plants, seeds and tissue cultures of the variety CH803657, and to methods for producing a corn plant produced by crossing a corn plant of variety CH803657 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 CH803657.