Establishment of RT-RPA for Citrus Yellow Vein Clearing Virus (CYVCV) Detection
MA ZhiMin,, XU JianJian, DUAN Yu, WANG ChunQing, SU Yue, ZHANG Qi, BIN Yu, ZHOU ChangYong,, SONG Zhen,Citrus Research Institute, Southwest University/National Citrus Engineering Research Center, Chongqing 400712
Abstract 【Objective】 The objective of this study is to establish a fast, simple, accurate and visualized with naked eyes new detection method for citrus yellow vein clearing virus (CYVCV) using reverse transcription-recombinase polymerase amplification (RT-RPA) combined with lateral flow dipstick (LFD).【Method】 Five pairs of primers were designed according to the conservative sequence of the coat protein gene of CYVCV. By detecting different samples, the pair of primers with the best amplification efficiency and specificity was selected. The selected primers were modified and its corresponding specific probe was designed. According setting 6 reaction gradient times (5, 10, 20, 30, 40 and 50 min) and 8 reaction gradient temperatures (37, 38, 39, 40, 41, 42, 43 and 44℃), the RT-RPA system for CYVCV detection was optimized. The specificity of the established RT-RPA was evaluated by detecting the samples infected with CYVCV, citrus leaf blotch virus (CLBV), citrus tristeza virus (CTV), citrus tatter leaf virus (CTLV), citrus exocortis viroid (CEVd), citrus psorosis virus (CPV), satsuma dwarf virus (SDV), Candidatus Liberibacter asiaticus (CLas) and Xanthomonas citri subsp. citri (Xcc), respectively. The citrus total RNA samples infected with CYVCV was diluted by 10 times. The original RNA solution and 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7 dilutions were used as templates for testing the sensitivity of RT-RPA, and the sensitivity was compared with RT-PCR. Leaves of different citrus varieties were randomly collected from the field. RT-RPA and RT-PCR were used at the same time to test the applicability of the established RT-RPA detection method.【Result】 A RT-RPA detection system for CYVCV was established, with primer pairs CY1-F/R and corresponding probe CY1 (47 bp). It could specifically amplify the target fragment of CYVCV with a size of 177 bp. The best reaction conditions were 39℃, 30 min. The result could be judged by the LFD test strip directly. In the specific test, only samples infected with CYVCV were positive, and the rest were negative. In the sensitivity detection, 10-4 dilution was the lowest detection sensitivity of RT-RPA and RT-PCR. The sensitivity of the two methods was equivalent. Among the 45 field citrus samples taken randomly, 37 samples were positive by RT-PCR and RT-RPA, and the positive rate was both 82.2%, indicating that the RT-RPA method established in this study was stable and reliable.【Conclusion】 A RT-RPA detection method for CYVCV is established. The method is convenient, rapid, and visualized. It can be applied to on-site rapid detection for the labs with insufficient basic conditions or plant protection and quarantine station. Keywords:citrus;citrus yellow vein clearing virus (CYVCV);RT-RPA;lateral flow dipstick test strip;rapid detection
PDF (2423KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 马志敏, 许建建, 段玉, 王春庆, 苏越, 张琦, 宾羽, 周常勇, 宋震. 柑橘黄化脉明病毒RT-RPA检测方法的建立[J]. 中国农业科学, 2021, 54(15): 3241-3249 doi:10.3864/j.issn.0578-1752.2021.15.009 MA ZhiMin, XU JianJian, DUAN Yu, WANG ChunQing, SU Yue, ZHANG Qi, BIN Yu, ZHOU ChangYong, SONG Zhen. Establishment of RT-RPA for Citrus Yellow Vein Clearing Virus (CYVCV) Detection[J]. Scientia Acricultura Sinica, 2021, 54(15): 3241-3249 doi:10.3864/j.issn.0578-1752.2021.15.009
=1:柑橘黄化脉明病毒CYVCV;2:柑橘衰退病毒CTV;3:柑橘叶斑驳病毒CLBV;4:柑橘碎叶病毒CTLV;5:柑橘裂皮病类病毒CEVd;6:柑橘鳞皮病毒CPV;7:温州蜜柑萎缩病毒SDV;8:柑橘溃疡病菌Xcc;9:柑橘黄龙病菌Clas;10:正对照Positive control;11:负对照Negative control Fig. 5RT-RPA specificity test for CYVCV detection
A:RT-PCR;B、C:RT-RPA;1、2:沃柑Orah;3—7:爱媛38 Ehime 38 hybrid citrus;8:正对照Positive control;9:负对照Negative control Fig. 7CYVCV detection using RT-RPA and RT-PCR for citrus samples from orchard
Table 2 表2 表2不同柑橘品种的RT-RPA 及RT-PCR 检测 Table 2CYVCV detection using RT-RPA and RT-PCR for different citrus varieties
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