according to the invention , there is provided a hybrid corn plant , designated as 3531 , produced by crossing two pioneer hi - bred international , inc . proprietary inbred corn lines . this invention thus relates to the hybrid seed 3531 , the hybrid plant produced from the seed , and variants , mutants , and trivial modifications of hybrid 3531 . 3531 is characterized by its high yielding and solid agronomics . 3531 has above average yield across all yield environments and responds to high planting rates .