PCR detection system of Lxx in sugarcane had been set up and optimized .Among the four primers, the detecting effect of PLxx was the best.

• 在此基础上，建立并优化了甘蔗植株体内Lxx的 PCR检测技术，其中引物对PLxx检测效果最好，而引物对PLxx 和P 4组合具有双重PCR检测效果。