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[1]WANG Fengjiao,YAN Jiakun,ZHANG Suiqi,et al.Comparison of the Effects of Dwarfing Genes Rht8 and Rht13 on Water Use Efficiency of Winter Wheat[J].Research of Soil and Water Conservation,2016,23(05):343-349.

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Comparison of the Effects of Dwarfing Genes Rht8 and Rht13 on Water Use Efficiency of Winter Wheat

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 05 Page number: 343-349 Column: Public date: 2016-10-28

Title:: Comparison of the Effects of Dwarfing Genes Rht8 and Rht13 on Water Use Efficiency of Winter Wheat

Author(s):: WANG Fengjiao^1,2, YAN Jiakun³, ZHANG Suiqi^1,3, HU Yingang⁴; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
4. College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: winter wheat; dwarfing gene; water use efficiency; yield; aboveground biomass

CLC:: Q945.79

DOI:: -

Abstract:: Water shortage is a serious problem threatening sustainable agricultural development in Northwest China, where winter wheat (Triticum aestivum L.) is the largest water-consuming crop. The objective of this study was to explore the effects of dwarfing genes on the water use efficiency (WUE) and yield of winter wheat in Yangling area. Four recombinant inbred lines (ZX₄₄: Rht8; ZX₃₄: Rht13; ZX₃₃: Rht8+Rht13 and ZX₁₆: rht) of winter wheat Jinmai 47 (Rht8) and Magnif M1 (Rht13) were studied in the field and pot experiments under drought and irrigation conditions. The results showed that the water consumptions of ZX₄₄, ZX₃₄ and ZX₃₃ lines had no significant difference from that of compared with control line (ZX₁₆) under the same water condition in the field and pot experiments. The yields of four wheat lines in the field experiment under drought condition decreased in the order: ZX₄₄ > ZX₃₄ > ZX₁₆ > ZX₃₃, and their yields decreased in the order: ZX₃₄ > ZX₄₄ > ZX₃₃ > ZX₁₆ in the field experiment under irrigation condition. The trend of yields of four wheat lines in the field experiment under drought and irrigation conditions was consistent with them in the pot experiment under drought and irrigation condition. The yield WUE of four wheat lines at yield level in the field experiment under drought condition decreased in the order: ZX₄₄ > ZX₃₄ > ZX₁₆ > ZX₃₃, and decreased in the order of ZX₄₄ > ZX₃₄ > ZX₃₃ > ZX₁₆ under irrigation condition. The trend of yield WUE of four wheat lines in the pot experiment under both drought and irrigation condition decreased in the order: ZX₃₄ > ZX₄₄ > ZX₁₆ > ZX₃₃. The yield WUE of ZX₃₄ line and ZX₄₄ line had no significant difference under the same water condition in the field experiment and also had no significant difference under drought condition in the pot experiment, but the difference was significant under irrigation condition in the pot experiment. The harvest indices of ZX₃₄ line and ZX₄₄ line were higher under two water condition in the field and pot experiments. The WUE at aboveground biomass level of four wheat lines had no significant difference under the same water condition in the field experiment. The WUE at aboveground biomass level of four wheat lines in the pot experiment under both drought and irrigation conditions decreased the order: ZX₃₄ > ZX₄₄ > ZX₃₃ > ZX₁₆. ZX₄₄ line and ZX₃₄ line showed the highest yield WUE under the two water status in the field and pot experiments, respectively. Compared with the control, ZX₄₄ and ZX₃₄ lines presented higher WUE at aboveground biomass level under irrigation condition in the field treatment and appeared under two water status in the pot condition. In conclusion, the yield and WUE of winter wheat can be improved obviously by the introduction of Rht8 gene and Rht13 gene. Winter wheat carrying with Rht13 gene is another material of wheat breeding with high WUE in semi-arid areas on the basis of combining with continuous selection.

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