Breeding wheat for higher yields alters photosynthesis response to light.
Breeding of wheat has changed how it uses light for photosynthesis. Despite lower light levels on leaves over time, the photosynthetic capacity and resistance to high light have stayed the same. Breeding has actually improved photosynthesis under high light, not low light. This change in breeding has altered the proteins involved in photosynthesis, light distribution, and protection from light damage. Overall, breeding has significantly changed how wheat plants use light, likely contributing to increased wheat yields.
