Effect of Sowing Dates on Starch Pasting Properties of Wheat Cultivars with Different Gluten Strength
Four wheat cultivars, Lankaoaizao 8,Yumai 34,Yumai 49-198 and Yumai 50 were sown in four different dates of 2006-2007 crop year and used to investigate the effect of different sowing dates on starch pasting properties. The results indicated that sowing date and genotype affected starch pasting properties of winter wheat. Among the four wheat cultivars, Yumai50 had the lowest values of peak viscosity(PV), final viscosity (FV) and trough viscosity(TV). Pasting temperature, peak viscosity, trough viscosity and final viscosity of Lankaoaizao 8, a medium gluten wheat cultivar, were also significantly lower than that of Yumai 34 and Yumai 49, a strong and a medium gluten cultivar, respectively. As for effect of sowing dates, the lowest peak viscosity, trough viscosity and final viscosity of Lankaoaizao 8, Yumai 34 and Yumai 50, were obtained in treatment S4 (sowed at 5th.Nov.), which was the latest sowing date in the experiment, indicating that the late sowing of winter wheat would result in decrease of starch properties in Henan Province but varied by cultivars. Correlation analysis showed that the decrease of the main pasting properties (PV, TV and FV) in late sowing treatments were closely related to the enhancement of temperature during grain filling stage, except for Yumain 49.
NETL
NSTL
万方数据
维普
