Study on the Relation between Leaf Area,Photosynthetic Rate and Yield of Wheat

In order to investigate the relationships among leaves at different positions,photosynthetic rate of flag leaf and grain yield,thirty-three wheat varieties(lines) which have differences among leaf characteristics,harvest index and yield were studied as materials.The results indicated that the correlations between the top-three leaf area and single plant biomass,economic yield were significantly positive.However,there were no significant correlation between the area of other leaves located on the base position single plant biomass,economic yield.A positive association was found between photosynthetic rate of flag leaves and biomass,economic yield,but correlation was not significant.However,the product of photosynthetic rate of flag leaves and leaf area was significantly and positively correlated with biomass and economic yield.In addition,there was a significantly positive correlation between biomass and economic yield.