【摘要】 以IRBB21为白叶枯抗病基因的供体亲本,珍汕97B为受体亲本,通过1次杂交、3次回交、1次自交,采用传统的回交育种和分子标记辅助选择技术相结合的方法获得了6个导入Xa21的珍汕97B导入系,其遗传背景恢复比例为92.8%-97.4%(平均为94.9%).更多还原

【Abstract】 Using IRBB21 as the donor of the resistant gene to rice bacterial blight disease, resistant gene Xa21 was introgressed into elite variety Zhenshan 97B through one cross, three backcrosses and one selfing. Six near-isogenic lines of Zhenshan 97B with introgressed Xa21 were obtained through traditional breeding method combined with marker assisted selection, of which the recovery rates of Zhenshan 97B genetic background ranged from 92.8% to 97.4% (94.9% on average).更多还原