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- W4309246145 abstract "Ilyonectria pseudodestructans, a plant pathogen that is known to cause root rot on fruit trees such as grapevine and apple, has recently been reported to also cause tuber decay in potato. The increasing risk of this pathogen on various horticultural crops makes it essential to develop a rapid and accurate detection method. In this study, an RNase H-dependent PCR (rhPCR) protocol and a modified probe-based rh-quantitative PCR (rhqPCR) protocol for I. pseudodestructans detection were developed. Both the forward and reverse primers for rhPCR and rhqPCR carry an RNA nucleotide at the site where a single-nucleotide polymorphism between I. pseudodestructans and strains of other Ilyonectria spp. is located, and the rhqPCR also contains a fluorescent-labeled target-specific probe. The primers were designed based on the sequence of the histone H3 gene and could amplify a DNA fragment of 73 bp. In the specificity test, by alignment via the BLASTn tool, the RNA nucleotide bases on both the forward and the reverse primers were identical to the corresponding genomic site of 16 of 17 (94.1%) database-available I. pseudodestructans strains, and different from 43 of 44 (97.7%) database-available strains of other Ilyonectria spp. When the rhPCR and rhqPCR protocols were applied on 11 I. pseudodestructans strains and 46 other strains of different species of plant pathogens, all of the I. pseudodestructans strains generated positive reactions whereas all of the other strains were negative, which indicated an excellent specificity of the primers. In the sensitivity test, the lowest DNA template amount for a positive reaction using the rhPCR and rhqPCR methods was 2 pg for I. pseudodestructans genomic DNA. When testing the rhqPCR method on gBlock, the lowest number of molecules for a positive reaction was six. These results indicated a high sensitivity of the protocol for I. pseudodestructans detection. To our knowledge, this is the first report of a probe-based rhqPCR to be applied to plant disease diagnosis; in addition, this is also the first rapid molecular protocol to detect I. pseudodestructans. The new rhPCR and rhqPCR methods have a potential to be applied by plant disease diagnostic labs for their routine work." @default.
- W4309246145 created "2022-11-25" @default.
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- W4309246145 date "2023-05-01" @default.
- W4309246145 modified "2023-10-17" @default.
- W4309246145 title "Detection of <i>Ilyonectria pseudodestructans</i> from Potato by RNase H-Dependent PCR (rhPCR) and rh-Quantitative PCR (rhqPCR)" @default.
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- W4309246145 doi "https://doi.org/10.1094/pdis-08-22-1809-re" @default.
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