水分调控对两种筋力型小麦品种籽粒淀粉糊化特性的影响

Effects of Water Regulating on Paste Properties of Starch of Two Winter Wheat Cultivars with Different Glutens

在池栽、防雨条件下,研究了不同灌水对两种筋力型小麦品种淀粉糊化特性的影响。结果表明,两种筋力型品种间淀粉粘度参数差异达0.01显著水平,强筋型品种豫麦34稀懈值、糊化温度低于弱筋型品种豫麦50,而最终粘度、反弹值、高峰粘度和低谷粘度大于豫麦50。水分调控对两种筋力型品种淀粉糊化特性有显著的影响,豫麦50主要粘度参数以灌4水处理和抽穗期灌1水处理较好,灌拔节1水处理较差;而豫麦34以灌1水处理较好,灌4水处理较差,其中拔节期灌1水与抽穗期灌1水差异不显著。分析两品种粘度参数之间的关系,豫麦50主要粘度参数间达显著相关水平,而豫麦34多数粘度参数间相关不显著,在栽培措施上豫麦50比豫麦34具有同步提高淀粉品质的可能性。

Effects of different irrigations on paste properties of starch of winter wheat were studied under rain sheltered pot-culture condition with two cultivars, Yumai 34（a strong gluten wheat） and Yumai 50（a weak gluten wheat）. The results indicated that the major paste parameters were significantly different at 0.01 levels between two gluten cultivars. BD and PT of Yumai 34 were lower than that of Yumai 50, and the other paste parameters of Yumai 34 were higher than Yumai 50. Water regulating had strong effect on paste properties of starch of two cultivars. The paste properties of starch of Yumai 50 with 4 irrigations and one irrigation of heading were better and that with one irrigation of jointing was bad. That of Yumai 34 with one irrigation were better and with 4 irrigations were bad, and it was not significantly different between one irrigation of jointing and heading. Correlation among paste parameters of starch of two cultivars were analyzed. That of Yumai 50 among major parameters was significantly correlative but that of Yumai 34 was not significant. It was more possible to improve starch quality of Yumai 50 than Yumai 34 by cultivation.