Article (Scientific journals)
Identification of Divergent Isolates of Banana Mild Mosaic Virus and Development of a New Diagnostic Primer to Improve Detection
Hanafi, Marwa; Tahzima, Rachid; BEN KAAB, Sofiene et al.
2020In Pathogens
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Keywords :
high throughput sequencing (HTS); diagnostic; BanMMV; Betaflexiviridae; primers; novel isolates; plant virus; total RNA
Abstract :
[en] Banana mild mosaic virus (BanMMV) (Betaflexiviridae, Quinvirinae, unassigned species) is a filamentous virus belonging to the Betaflexiviridae family. It infects Musa spp. with a very wide geographic distribution. The genome variability of plant viruses, including the members of the Betaflexiviridae family, makes their molecular detection by specific primers particularly challenging. During routine indexing of the Musa germplasm accessions, a discrepancy was observed between electron microscopy and immunocapture (IC) reverse transcription (RT) polymerase chain reaction (PCR) test results for one asymptomatic accession. Filamentous viral particles were observed while molecular tests failed to amplify any fragment. The accession underwent high-throughput sequencing and two complete genomes of BanMMV with 75.3% of identity were assembled. Based on these sequences and on the 54 coat protein sequences available from GenBank, a new forward primer, named BanMMV CP9, compatible with Poty1, an oligodT reverse primer already used in diagnostics, was designed. A retrospective analysis of 110 different germplasm accessions from diverse origins was conducted, comparing BanMMCP2 and BanMMV CP9 primers. Of these 110 accessions, 16 tested positive with both BanMMCP2 and BanMMV CP9, 3 were positive with only BanMMCP2 and 2 tested positive with only BanMMV CP9. Otherwise, 89 were negative with the two primers and free of flexuous virions. Sanger sequencing was performed from purified PCR products in order to confirm the amplification of the BanMMV sequence for the five accessions with contrasting results. It is highly recommended to use the two primers successively to improve the inclusiveness of the protocol.
Disciplines :
Biotechnology
Author, co-author :
Hanafi, Marwa  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Tahzima, Rachid ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
BEN KAAB, Sofiene;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Tamisier, lucie ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Roux, Nicolas;  Consultative Group on International Agricultural Research, 34090 Montpellier, France
Massart, Sébastien  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Language :
English
Title :
Identification of Divergent Isolates of Banana Mild Mosaic Virus and Development of a New Diagnostic Primer to Improve Detection
Publication date :
12 December 2020
Journal title :
Pathogens
eISSN :
2076-0817
Publisher :
Molecular Diversity Preservation International (MDPI), Basel, Switzerland
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 January 2021

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