茎秆长度和根系的稳固性是决定作物抗倒伏的重要性状,长的茎秆会促成茎秆倒伏,弱的根系会促使从根旁倒伏.但是,根据我们的资料,大多数用作矮秆供体,带有br和uz矮化基因的大麦品种,根系发育都比较弱和不稳固.利用回交,把所需的矮秆性传给杂种的同时,降低了根系的稳固性. The length of the stalk and the stability of the root system are important traits that determine the lodging resistance of the crop. A long stem contributes to the stalk lodging and the weak root causes lodging from the root. However, according to our data, most are used as dwarf The donor, barley cultivars with the dwarfing genes br and uz, had weakly developed and unstable root systems, and by backcrossing the required dwarfism to the hybrids decreased the stability of the root system.