Effects of shading on morphology, physiology and grain yield of winter wheat

In a field experiment, winter wheat (Triticum aestivum L.) cultivars Yangmai 158 (YM 158, shading tolerant) and Yangmai 11 (YM 11, shading-sensitive) were subjected to shading between jointing and maturity. Three shading treatments were applied, i.e. 92% (S1), 85% (S2) and 77% (S3) of full radiation (S0, control). Compared with S0, the observed grain yield increased in the S1 and S2 treatments of YM 158 but not in S1 of YM 11. The yield loss of...