Backcross and hormone treatment have not succeeded in seeding, the chromosome doubling with the technique of the inflorescence culture is the reasonable method of resuming fertility to the hybrid.

• 5加拿大披碱草与老芒麦亲缘关系较远，用回交法和自然恢复育性的方法恢复育性有一定的困难，结合幼穗培养技术的染色体加倍方法是解决其育性问题的合理途径之一。