Application of HYR gene in regulating and controlling plant height and tillering of festuca arundinacea

The invention relates to application of an HYR gene in regulation and control of plant height and tillering of festuca arundinacea, and belongs to the field of plant genetic engineering.The method includes the steps that a plant recombinant expression vector of the HYR gene driven by a photoinduced expression promoter pRbcS5 is constructed firstly, then the festuca arundinacea is converted through an agrobacterium-mediated method to obtain transgenic festuca arundinacea with HYR overexpression, and the transgenic festuca arundinacea with HYR overexpression is obtained; the biological function of the HYR gene in festuca arundinacea is analyzed; the festuca arundinacea plant overexpressed with the HYR gene can provide more theoretical basis for regulating and controlling the plant height and tillering of festuca arundinacea and other gramineous plants, can be used for cultivating transgenic turfgrass varieties with reduced plant height and increased tillering, and has practical application value in optimizing t