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Reverse transcription loop-mediated isothermal amplification assay for rapid detection of Papaya ringspot virus

文献类型: 外文期刊

作者: Shen, Wentao 1 ; Tuo, Decai 1 ; Yan, Pu 1 ; Yang, Yong 1 ; Li, Xiaoying 1 ; Zhou, Peng 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol & Anal, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Peoples R China; Chinese Acad Trop Agr Sci, Testing Ctr, Haikou 571101, Peoples R China

关键词: Papaya ringspot virus;PRSV detection;Reverse transcription loop-mediated isothermal amplification;RT-PCR

期刊名称:JOURNAL OF VIROLOGICAL METHODS ( 影响因子:2.014; 五年影响因子:2.001 )

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收录情况: SCI

摘要: Papaya ringspot virus (PRSV) and Papaya leaf distortion mosaic virus (PLDMV), which causes disease symptoms similar to PRSV, threaten commercial production of both non-transgenic-papaya and PRSV-resistant transgenic papaya in China. A reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay to detect PLDMV was developed previously. In this study, the development of another RT-LAMP assay to distinguish among transgenic, PRSV-infected and PLDMV-infected papaya by detection of PRSV is reported. A set of four RT-LAMP primers was designed based on the highly conserved region of the P3 gene of PRSV. The RT-LAMP method was specific and sensitive in detecting PRSV, with a detection limit of 1.15 x 10(-6) mu g of total RNA per reaction. Indeed, the reaction was 10 times more sensitive than one-step RT-PCR. Field application of the RT-LAMP assay demonstrated that samples positive for PRSV were detected only in non-transgenic papaya, whereas samples positive for PLDMV were detected only in commercialized PRSV-resistant transgenic papaya. This suggests that PRSV remains the major limiting factor for non-transgenic-papaya production, and the emergence of PLDMV threatens the commercial transgenic cultivar in China. However, this study, combined with the earlier development of an RT-LAMP assay for PLDMV, will provide a rapid, sensitive and cost-effective diagnostic power to distinguish virus infections in papaya

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