柑橘黄龙病PCR检测引物比较研究

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柑橘黄龙病潜伏期长、尚无可用于大田的有效治疗药剂,快速、准确的早期检测是防控柑橘黄龙病的关键.PCR检测是目前柑橘黄龙病最常用的早期检测方法.为提高柑橘黄龙病PCR检测的准确性和检出率,本研究依据已测序的黄龙病菌全基因组序列对检测引物OI2c进行了改进(标记为OI2c-gj),将其与其他常用的7对PCR检测引物进行了特异性和灵敏度的筛选和比较.结果表明,8对黄龙病PCR检测引物中,特异性较好的引物为OI1/OI2c-gj、Las606/LSS、P400F/P400R、A2/J5、16SF/16SR、primer1/primer2;灵敏度较好的引物从高到低依次为:OI1/OI2c-gj=Las606/LSS>P400F/P400R=A2/J5>16SF/16SR>primer1/primer2.综合比较引物特异性和灵敏度,本研究改进的引物OI1/OI2c-gj以及Las606/LSS、P400F/P400R、A2/J5对柑橘黄龙病检测有较好的准确性和检出率,建议用于柑橘黄龙病的早期检测.
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