PMID- 26743662 OWN - NLM STAT- MEDLINE DCOM- 20161226 LR - 20181202 IS - 1365-2672 (Electronic) IS - 1364-5072 (Linking) VI - 120 IP - 5 DP - 2016 May TI - High-throughput multiplex real-time PCR assay for the simultaneous quantification of DNA and RNA viruses infecting cassava plants. PG - 1346-56 LID - 10.1111/jam.13043 [doi] AB - AIMS: To develop a multiplex TaqMan-based real-time PCR assay (qPCR) for the simultaneous detection and quantification of both RNA and DNA viruses affecting cassava (Manihot esculenta) in eastern Africa. METHODS AND RESULTS: The diagnostic assay was developed for two RNA viruses; Cassava brown streak virus (CBSV) and Uganda cassava brown streak virus (UCBSV) and two predominant DNA viruses; African cassava mosaic virus (ACMV) and East African cassava mosaic virus (EACMV), which cause the economically important cassava brown streak disease (CBSD) and cassava mosaic disease (CMD) respectively. Our method, developed by analysing PCR products of viruses, was highly sensitive to detect target viruses from very low quantities of 4-10 femtograms. Multiplexing did not diminish sensitivity or accuracy compared to uniplex alternatives. The assay reliably detected and quantified four cassava viruses in field samples where CBSV and UCBSV synergy was observed in majority of mixed-infected varieties. CONCLUSIONS: We have developed a high-throughput qPCR diagnostic assay capable of specific and sensitive quantification of predominant DNA and RNA viruses of cassava in eastern Africa. SIGNIFICANCE AND IMPACT OF THE STUDY: The qPCR methods are a great improvement on the existing methods and can be used for monitoring virus spread as well as for accurate evaluation of the cassava varieties for virus resistance. CI - (c) 2016 The Society for Applied Microbiology. FAU - Otti, G AU - Otti G AD - Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, UK. FAU - Bouvaine, S AU - Bouvaine S AD - Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, UK. FAU - Kimata, B AU - Kimata B AD - Naliendele Agricultural Research Institute, Naliendele, Tanzania. FAU - Mkamillo, G AU - Mkamillo G AD - Naliendele Agricultural Research Institute, Naliendele, Tanzania. FAU - Kumar, P L AU - Kumar PL AD - International Institute of Tropical Agriculture, Ibadan, Nigeria. FAU - Tomlins, K AU - Tomlins K AD - Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, UK. FAU - Maruthi, M N AU - Maruthi MN AD - Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, UK. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160311 PL - England TA - J Appl Microbiol JT - Journal of applied microbiology JID - 9706280 SB - IM MH - Begomovirus/*genetics MH - DNA Viruses/genetics MH - Manihot/*virology MH - Multiplex Polymerase Chain Reaction/methods MH - Plant Diseases/*virology MH - Potyviridae/*genetics MH - RNA Viruses/genetics MH - Real-Time Polymerase Chain Reaction/methods OTO - NOTNLM OT - TaqMan assays OT - begomovirus OT - cassava diseases OT - ipomovirus OT - real-time PCR OT - virus detection and quantification EDAT- 2016/01/09 06:00 MHDA- 2016/12/27 06:00 CRDT- 2016/01/09 06:00 PHST- 2015/07/28 00:00 [received] PHST- 2016/01/04 00:00 [revised] PHST- 2016/01/04 00:00 [accepted] PHST- 2016/01/09 06:00 [entrez] PHST- 2016/01/09 06:00 [pubmed] PHST- 2016/12/27 06:00 [medline] AID - 10.1111/jam.13043 [doi] PST - ppublish SO - J Appl Microbiol. 2016 May;120(5):1346-56. doi: 10.1111/jam.13043. Epub 2016 Mar 11.