Effect of a novel dwarfing mutant site on chromosome 4B on agronomic traits in common wheat
Hao J. Zhao Z. Fu X. Zhao Y. Ateeq M. Mou L. Han Y. Liu Y. Yin Y. Zotova L. Serikbay D. Fan C. Hu Y.-G. Chen L.
2024Frontiers Media SA
Frontiers in Plant Science
2024#15
The introduction of dwarfing genes triggered a wave of “green revolution”. A number of wheats dwarfing genes have been reported in previous studies, and only a small fraction of these have been applied to production practices. Therefore, the development of novel dwarfing genes for wheat is of great value. In this study, a novel dwarfing site, Rht-yz, identified in the Yanzhan mutation, is located on chromosome 4B (30-33MB) and its mechanism of action is different from that of Rht-B1b (C-T mutation), but whether it affects the Rht-B1a (TraesCS4B02G043100) or other genes is unclear. Exogenously applied GA3 experiments showed that Rht-yz is one of the gibberellin-insensitive dwarf genes. The effects of the dwarf gene Rht-yz on agronomic traits in wheat were evaluated in the field using Yanzhan, Yanzhan mutations, F2:3 and F3:4 lines. The results showed that Rht-yz improved lodging resistance by reducing plant height, increasing diameter, wall thickness and mechanical strength of the basal stem. In terms of yield traits, Rht-yz had negative effects on tiller number plant-1, biomass plant-1 and yield plant-1, but had no significant effect on harvest index, 1000-kernel weight and spike traits. In addition, Rht-yz significantly increased crude protein, wet gluten and starch content. Therefore, the rational use of the new dwarfing site Rht-yz has potential and value in dwarf wheat breeding. Copyright
agronomic traits , dwarf gene , lodging resistance , plant height , wheat
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State Key Laboratory of Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest AF University, Shaanxi, Yangling, China
Dingxi Academy of Agricultural Sciences, Gansu, Dingxi, China
Jiushenghe Seed Industry Co., Ltd, Xinjiang, Changji, China
Yangling Digital Agricultural Technology Co., Ltd, Yangling, Shaanxi, China
Shaanxi Grain and Agriculture Group Co., Ltd., Shaanxi, Xi’an, China
Faculty of Agronomy, S. Seifullin Kazakh Agro Technical Research University, Astana, Kazakhstan
Baoji Academy of Agricultural Sciences, Baoji, China
Institute of Water Saving Agriculture in Arid Regions of China, Northwest AF University, Shaanxi, Yangling, China
State Key Laboratory of Crop Stress Resistance and High-Efficiency Production and College of Agronomy
Dingxi Academy of Agricultural Sciences
Jiushenghe Seed Industry Co.
Yangling Digital Agricultural Technology Co.
Shaanxi Grain and Agriculture Group Co.
Faculty of Agronomy
Baoji Academy of Agricultural Sciences
Institute of Water Saving Agriculture in Arid Regions of China
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