Abstract:

In order to recommend new water-saving wheat varieties to alleviate the pressure of agricultural water use in Hebei Province, we explored the water-saving and high-yield characteristics of a new water-saving wheat strain ‘Shi 17T5252’. We studied the yield, morphology, grain filling and quality of a new wheat line ‘Shi 17T5252’ and a water-saving control variety ‘Shimai 22’ during the entire growth period, with irrigation of no water (W0), jointing water (W1), jointing and grouting water (W2). The fluorescence parameters of leaves at jointing stage, heading stage and middle filling stage were also measured. The results showed that the yield of ‘Shi 17T5252’ was significantly higher than that of ‘Shimai 22’ under the condition of W1 and W2, with an increase of 10.32% and 7.56%, respectively, W1 increased grain yield by increasing 1000-grain weight, while W2 increased yield by increasing grain number per spike and 1000-grain weight. Compared with W0, W1 and W2 did not increase plant height, but significantly increased spike length of ‘Shimai 22’ and grain number per spike of ‘Shi 17T5252’ by 0.72-0.84 cm and 1.33-5.03 grains, respectively. Compared with W1, W2 significantly increased the grain length and width of ‘Shimai 22’ by 0.36 mm and 0.32 mm, respectively, and ‘Shi 17T5252’ increased the grain width by 0.31 mm. The Fv/Fm ratio at heading stage of ‘Shimai 22’ was significantly higher than that of ‘Shi 17T5252’ only under W0 treatment. The protein content, wet gluten content and gluten index of ‘Shi 17T5252’ were significantly higher than those of ‘Shimai 22’. The results indicate that ‘Shi 17T5252’ has achieved synchronous improvement in yield and quality under water-saving irrigation conditions, and is expected to become the main wheat variety for water-saving irrigation in Hebei.

Key words: ‘Shi 17T5252’, water-saving irrigation, yield, quality, fluorescence parameters