Abstract:

To investigate the changes of major morphology and quality characters under shading after anthese, four wheat varieties with strong gluten and suitable for planting in the middle-southern Hebei Province were selected as materials and shading treatments were conducted after anthese. The results indicated that 25% (S1) shading could increase the plant height compared with control (S0), however, the increasing rate of 50% shading (S2) was lower than that of S1, plant height of ‘Gaoyou 2018’ was even lower than that of S0. There were significant differences in the parameters of flag leaf among the wheat varieties with shading treatments, for example the flag leaf area of ‘Shiluan 02-1’ and ‘Shiyou 20’ increased with the length of leaf increasing, the flag leaf thickness of ‘Gaoyou 5766’ reduced, while no change was detected in the flag leaf of ‘Gaoyou 2018’. The change characteristics between varieties were different, shading increased paste development time, stability time, extension energy and max resistance of ‘Shiyou 20’ and ‘Gaoyou 5766’, but decreased the paste development time, stability time, extension area and max resistance of ‘Shiluan 02-1’, decreased the paste development time, stability time and max resistance of ‘Gaoyou 2018’ but increased the extension area. The responses of high-quality strong gluten wheat had something in common, but there was also difference between varieties. Under shading condition, it may be that the low photosynthetic rate of leaves decreases dry matter accumulation and transportation, and the increase of protein content leads to the general response, like the increase of protein and wet gluten content. However, the grain protein components are different among the four wheat varieties, which may be the important reason for the difference on the starch and extensograph paramters.

Key words: shading, high-quality strong gluten wheat, morphology, quality