A study on distribution of 14C-assimilates from functional leaves in grains of maize at filling stage was carried out.The results showed that distribution of 14C-photosynthetic products in grains of each row of ear were similar while in grains of different position within the same row were different.The amount of 14C-photosynthetic products in the ear was in order of middle grains>bottom grains>top grains.It was also found that 14C-photosynthet-ic products between the grains next to each other were signific...