期刊
JOURNAL OF VIROLOGICAL METHODS
卷 299, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jviromet.2021.114336
关键词
Dried reagent; LAMP; On-site detection; SLCMV
资金
- Science and Technology Research Partnership for Sustainable Development [JPMJSA1508]
- Japan Science and Technology Agency
- Japan International Cooperation Agency
A rapid and sensitive LAMP assay was developed for the detection of SLCMV in cassava leaves, with a sensitivity up to 10,000 times higher than conventional PCR assay, allowing for detection even in symptomless stem cuttings. A practical LAMP protocol using stable dried reagents was established for on-site detection in the field by incubating reactions in water at 60-65 degrees C.
Recently, the widespread occurrence of Sri Lankan cassava mosaic virus (SLCMV), genus Begomovirus, family Geminiviridae, which causes a mosaic disease in cassava (Manihot esculenta Crantz) in South-East Asia have, become a serious economic issue. Since cassava is propagated through vegetative cuttings, a rapid virus diagnostic method is crucial for generating virus-free planting materials. In this study, a loop-mediated isothermal amplification (LAMP) assay using six primers was developed and validated for the rapid detection of SLCMV in cassava leaves. This SLCMV assay had a detection sensitivity that was up to 10,000 times higher than that of the conventional polymerase chain reaction assay and can detect the virus from symptomless stem cutting, which is a potential long-distance spreader of the virus. Furthermore, a practical LAMP protocol using stable dried reagents from a commercial kit was established so that the assay could be performed in the field by incubating the reactions in water at 60-65 degrees C instead of using a thermal cycler. The primer sequences and the LAMP protocol described here should be useful for the rapid and sensitive on-site detection of SLCMV.
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