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      Complete Genome Sequence of a Carrot Torradovirus 1 Isolate, Obtained from Angelica keiskei in Japan

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          Abstract

          The complete genome sequence of the first Japanese isolate of carrot torradovirus 1 (CaTV1-J), which infects Angelica keiskei, was determined. This is the first report of a CaTV1 isolate obtained from A. keiskei.

          ABSTRACT

          The complete genome sequence of the first Japanese isolate of carrot torradovirus 1 (CaTV1-J), which infects Angelica keiskei, was determined. This is the first report of a CaTV1 isolate obtained from A. keiskei.

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          ICTV Virus Taxonomy Profile: Secoviridae

          Members of the family Secoviridae are non-enveloped viruses with mono- or bipartite (RNA-1 and RNA-2) linear positive-sense ssRNA genomes with the size of the RNAs combined ranging from 9 to 13.7 kb. They are related to picornaviruses and are classified in the order Picornavirales. The majority of known members infect dicotyledonous plants and many are important plant pathogens (e.g. grapevine fanleaf virus and rice tungro spherical virus). This is a summary of the current International Committee on Taxonomy of Viruses (ICTV) report on the taxonomy of the family Secoviridae available at www.ictv.global/report/secoviridae.
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            Carrot yellow leaf virus Is Associated with Carrot Internal Necrosis

            Internal necrosis of carrot has been observed in UK carrots for at least 10 years, and has been anecdotally linked to virus infection. In the 2009 growing season some growers had up to 10% of yield with these symptoms. Traditional diagnostic methods are targeted towards specific pathogens. By using a metagenomic approach with high throughput sequencing technology, other, as yet unidentified causes of root necrosis were investigated. Additionally a statistical analysis has shown which viruses are most closely associated with disease symptoms. Carrot samples were collected from a crop exhibiting root necrosis (102 Affected: 99 Unaffected) and tested for the presence of the established carrot viruses: Carrot red leaf virus (CtRLV), Carrot mottle virus (CMoV), Carrot red leaf associated viral RNA (CtRLVaRNA) and Parsnip yellow fleck virus (PYFV). The presence of these viruses was not associated with symptomatic carrot roots either as single viruses or in combinations. A sub-sample of carrots of mixed symptom status was subjected to MiSeq sequencing. The results from these tests suggested Carrot yellow leaf virus (CYLV) was associated with symptomatic roots. Additionally a novel Torradovirus, a novel Closterovirus and two novel Betaflexiviradae related plant viruses were detected. A specific diagnostic test was designed for CYLV. Of the 102 affected carrots, 98% were positive for CYLV compared to 22% of the unaffected carrots. From these data we conclude that although we have yet to practically demonstrate a causal link, CYLV appears to be strongly associated with the presence of necrosis of carrots.
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              First report of Carrot torrado virus 1 and Carrot thin leaf virus naturally infecting Torilis arvensis ssp. arvensis in Greece

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                Author and article information

                Contributors
                Role: Editor
                Journal
                Microbiol Resour Announc
                Microbiol Resour Announc
                ga
                mra
                MRA
                Microbiology Resource Announcements
                American Society for Microbiology (1752 N St., N.W., Washington, DC )
                2576-098X
                11 April 2019
                April 2019
                : 8
                : 15
                : e00110-19
                Affiliations
                [a ]Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
                Queens College
                Author notes
                Address correspondence to Shigetou Namba, anamba@ 123456mail.ecc.u-tokyo.ac.jp .

                Citation Tokuda R, Nishikawa M, Hosoe N, Nijo T, Iwabuchi N, Yoshida T, Watanabe K, Maejima K, Yamaji Y, Namba S. 2019. Complete genome sequence of a carrot torradovirus 1 isolate, obtained from Angelica keiskei in Japan. Microbiol Resour Announc 8:e00110-19. https://doi.org/10.1128/MRA.00110-19.

                Article
                MRA00110-19
                10.1128/MRA.00110-19
                6460027
                30975804
                7a2df341-5df2-4f4c-b6c8-8b282ecc9b2e
                Copyright © 2019 Tokuda et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

                History
                : 29 January 2019
                : 8 March 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 11, Pages: 2, Words: 1370
                Funding
                Funded by: MEXT | Japan Society for the Promotion of Science (JSPS), https://doi.org/10.13039/501100001691;
                Award ID: 25221201
                Award Recipient :
                Funded by: MEXT | Japan Society for the Promotion of Science (JSPS), https://doi.org/10.13039/501100001691;
                Award ID: 17H03770
                Award Recipient :
                Funded by: MEXT | Japan Society for the Promotion of Science (JSPS), https://doi.org/10.13039/501100001691;
                Award ID: 16K14848
                Award Recipient :
                Categories
                Genome Sequences
                Custom metadata
                April 2019

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