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美国进境樱桃果实中梨火疫病菌的检测

, PP. 441-446

Keywords: 梨火疫病菌,樱桃果实,常规PCR,套式PCR,实时荧光PCR

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Abstract:

为了筛选快速、灵敏的梨火疫病菌检测方法,利用常规PCR、套式PCR和实时荧光PCR方法分别对美国进境的326批樱桃果实中梨火疫病菌进行检测。结果显示,3种PCR方法的检出率不同,不同引物或探针的检出率也存在差异。在常规PCR中,引物Ams3/Ams4c、P29A/P29B和PEANT1/PEANT2的检出率分别为35.28%、24.85%和16.87%;单管套式PCR和套式PCR的检出率分别为23.01%和50.61%;4种实时荧光PCR的检出率分别为17.48%(探针PA)、32.21%(探针Ams)、29.14%(探针ITS)和23.93%(SYBRGreenⅠ)。在所有试验方法中由引物P29A/P29B和PEANT1/PEANT2组成的套式PCR的检出率最高。检测结果证实了进境樱桃果实中存在梨火疫病菌DNA,套式PCR和常规PCR(引物Ams3/4c)可用于进境樱桃样品中梨火疫病菌的常规检测。

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