Photosynthesis is a major objective to improve yield potential of wheat. Photosynthesis is directly linked to chlorophyll content. Indirectly, chlorophyll content influence grain yield.
Plants have its own balanced metabolic mechanisms. Mostly chalorophill content increase or decrease is related to intensity of light, which is received by the plants. To increase the yield of grain, many factors are involved. Chalorophil content may have indirect role in wheat.
General truth; the relation of photosynthesis rate, chllorophyll content and yield is direct and positively. So, if you have increement in photosynthesis content, then yield is increased in wheat. Read attached article.
Yes , the chlorophyll content affect the grain yield in durum wheat as the higher the chlorophyll content the higher will be the yield as it contributes to the higher no. Of stomatal cells and parenchyma tissues which lead to a higher yield of grains .