ArticleBMC genomics2024
Assessing the de novo assemblers: a metaviromic study of apple and first report of citrus concave gum-associated virus, apple rubbery wood virus 1 and 2 infecting apple in India.
Article in BMC genomics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Prevalence, genetic diversity, and phylogenetic analysis of apple stem grooving virus in low-chilling apple cultivars.Virusdisease · 2025Article
- Unveiling viral threats to temperate pome fruits: characterization, transmission, and sustainable management strategies.Frontiers in microbiology · 2025Review
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11 authors.
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Abstract
backgroundThe choice of de novo assembler for high-throughput sequencing (HTS) data remains a pivotal factor in the HTS-based discovery of viral pathogens. This study assessed de novo assemblers, namely Trinity, SPAdes, and MEGAHIT for HTS datasets generated on the Illumina platform from 23 apple samples, representing 15 exotic and indigenous apple varieties and a rootstock. The assemblers were compared based on assembly quality metrics, including the largest contig, total assembly length, genome coverage, and N50.
resultsMEGAHIT was most efficient assembler according to the metrics evaluated in this study. By using multiple assemblers, near-complete genome sequences of citrus concave gum-associated virus (CCGaV), apple rubbery wood virus 1 (ARWV-1), ARWV-2, apple necrotic mosaic virus (ApNMV), apple mosaic virus, apple stem pitting virus, apple stem grooving virus, apple chlorotic leaf spot virus, apple hammerhead viroid and apple scar skin viroid were reconstructed. These viruses were further confirmed through Sanger sequencing in different apple cultivars. Among them, CCGaV, ARWV-1 and ARWV-2 were recorded from apples in India for the first time. The analysis of virus richness revealed that ApNMV was dominant, followed by ARWV-1 and CCGaV. Moreover, MEGAHIT identified novel single-nucleotide variants.
conclusionsOur analyses highlight the crucial role of assembly methods in reconstructing near-complete apple virus genomes from the Illumina reads. This study emphasizes the significance of employing multiple assemblers for de novo virus genome assembly in vegetatively propagated perennial fruit crops.
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