NDLI: Revisiting the classification of curtoviruses based on genome-wide pairwise identity

Content Provider	Springer Nature Link
Author	Varsani, Arvind Martin, Darren P. Navas Castillo, Jesús Moriones, Enrique Hernández Zepeda, Cecilia Idris, Ali Murilo Zerbini, F. Brown, Judith K.
Copyright Year	2014
Abstract	Members of the genus Curtovirus (family Geminiviridae) are important pathogens of many wild and cultivated plant species. Until recently, relatively few full curtovirus genomes have been characterised. However, with the 19 full genome sequences now available in public databases, we revisit the proposed curtovirus species and strain classification criteria. Using pairwise identities coupled with phylogenetic evidence, revised species and strain demarcation guidelines have been instituted. Specifically, we have established 77 % genome-wide pairwise identity as a species demarcation threshold and 94 % genome-wide pairwise identity as a strain demarcation threshold. Hence, whereas curtovirus sequences with >77 % genome-wide pairwise identity would be classified as belonging to the same species, those sharing >94 % identity would be classified as belonging to the same strain. We provide step-by-step guidelines to facilitate the classification of newly discovered curtovirus full genome sequences and a set of defined criteria for naming new species and strains. The revision yields three curtovirus species: Beet curly top virus (BCTV), Spinach severe surly top virus (SpSCTV) and Horseradish curly top virus (HrCTV).
Starting Page	1873
Ending Page	1882
Page Count	10
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	159
Issue Number	7
e-ISSN	14328798
Language	English
Publisher	Springer Vienna
Publisher Date	2014-01-25
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Virology Medical Microbiology Infectious Diseases
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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