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Type: Journal article
Title: De novo assembly of honey bee RNA viral genomes by tapping into the innate insect antiviral response pathway
Author: Fung, E.
Hill, K.
Hogendoorn, K.
Glatz, R.
Napier, K.
Bellgard, M.
Barrero, R.
Citation: Journal of Invertebrate Pathology, 2018; 152:38-47
Publisher: Elsevier
Issue Date: 2018
ISSN: 0022-2011
Statement of
Elisabeth Fung, Kelly Hill, Katja Hogendoorn, Richard V. Glatz, Kathryn R. Napier, Matthew I. Bellgard, Roberto A. Barrero
Abstract: Bee pollination is critical for improving productivity of one third of all plants or plant products consumed by humans. The health of honey bees is in decline in many countries worldwide, and RNA viruses together with other biological, environmental and anthropogenic factors have been identified as the main causes. The rapid genetic variation of viruses represents a challenge for diagnosis. Thus, application of deep sequencing methods for detection and analysis of viruses has increased over the last years. In this study, we leverage from the innate Dicer-2 mediated antiviral response against viruses to reconstruct complete viral genomes using virus-derived small interfering RNAs (vsiRNAs). Symptomatic A. mellifera larvae collected from hives free of Colony Collapse Disorder (CCD) and the parasitic Varroa mite (Varroa destructor) were used to generate more than 107 million small RNA reads. We show that de novo assembly of insect viral sequences is less fragmented using only 22 nt long vsiRNAs rather than a combination of 21-22 nt small RNAs. Our results show that A. mellifera larvae activate the RNAi immune response in the presence of Sacbrood virus (SBV). We assembled three SBV genomes from three individual larvae from different hives in a single apiary, with 1-2% nucleotide sequence variability among them. We found 3-4% variability between SBV genomes generated in this study and earlier published Australian variants suggesting the presence of different SBV quasispecies within the country.
Keywords: Sacbrood virus
genome assembly
honey bee
small RNA sequencing
Rights: © 2018 Published by Elsevier Inc.
DOI: 10.1016/j.jip.2018.01.002
Appears in Collections:Aurora harvest 3
Zoology publications

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