Diagnostic qPCR Assay to Detect Fusarium brasiliense , a Causal Agent of Soybean Sudden Death Syndrome and Root Rot of Dry Bean

Species within clade 2 of the species complex (FSSC) are significant pathogens of dry bean ( ) and soybean ( ), causing root rot and/or sudden death syndrome (SDS). These species are morphologically difficult to distinguish and often require molecular tools for proper diagnosis to a species level. H...

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Veröffentlicht in:Plant disease 2020-01, Vol.104 (1), p.246-254
Hauptverfasser: Roth, Mitchell G, Oudman, Kjersten A, Griffin, Amanda, Jacobs, Janette L, Sang, Hyunkyu, Chilvers, Martin I
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container_issue 1
container_start_page 246
container_title Plant disease
container_volume 104
creator Roth, Mitchell G
Oudman, Kjersten A
Griffin, Amanda
Jacobs, Janette L
Sang, Hyunkyu
Chilvers, Martin I
description Species within clade 2 of the species complex (FSSC) are significant pathogens of dry bean ( ) and soybean ( ), causing root rot and/or sudden death syndrome (SDS). These species are morphologically difficult to distinguish and often require molecular tools for proper diagnosis to a species level. Here, a TaqMan probe-based quantitative PCR (qPCR) assay was developed to distinguish from other closely related species within clade 2 of the FSSC. The assay displays high specificity against close relatives and high sensitivity, with a detection limit of 100 fg. This assay was able to detect from purified mycelia, infected dry bean roots, and soil samples throughout Michigan. When multiplexed with an existing qPCR assay specific to , accurate quantification of both and was obtained, which can facilitate accurate diagnoses and identify coinfections with a single reaction. The assay is compatible with multiple qPCR thermal cycling platforms and will be helpful in providing accurate detection of . Management of root rot and SDS pathogens in clade 2 of the FSSC is challenging and must be done proactively, because no midseason management strategies currently exist. However, accurate detection can facilitate management decisions for subsequent growing seasons to successfully manage these pathogens.
doi_str_mv 10.1094/PDIS-01-19-0016-RE
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source MEDLINE; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; American Phytopathological Society Journal Back Issues
subjects Fusarium - genetics
Glycine max - microbiology
Michigan
Plant Diseases - microbiology
Plant Roots - microbiology
Polymerase Chain Reaction
Soil Microbiology
Species Specificity
title Diagnostic qPCR Assay to Detect Fusarium brasiliense , a Causal Agent of Soybean Sudden Death Syndrome and Root Rot of Dry Bean
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