Incidence and Genetic Diversity of Grapevine Virus G in Croatian Vineyards

Grapevine virus G (GVG) is a recently discovered vitivirus infecting grapevines. Historically, viruses in the genus Vitivirus have been associated with the grapevine rugose wood disease. Based on new and previously reported GVG isolates, primers and probes were developed for real-time RT-PCR. The de...

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Bibliographic Details
Published in:Plants (Basel) 2022-09, Vol.11 (18), p.2341
Main Authors: Jagunić, Martin, Diaz-Lara, Alfredo, Szőke, Lóránt, Rwahnih, Maher Al, Stevens, Kristian, Zdunić, Goran, Vončina, Darko
Format: Article
Language:English
Subjects:
Amino acids
Analysis
Biological diversity
Coat protein
Cultivars
detection
Diseases and pests
Dormancy
Epidemiology
field survey
Genetic aspects
Genetic diversity
Grapes
grapevine
Grapevines
Growing season
Health aspects
Infection
Infections
International economic relations
Nucleotides
Phylogeny
Physiological aspects
Plant viruses
Primers (coatings)
Proteins
RT-PCR
sequencing
Statistics
Taxonomy
Vines
Vineyards
Virus diseases of plants
Virus research
Viruses
vitivirus
Wine industry
Wineries
Wineries & vineyards
Wines
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Summary:Grapevine virus G (GVG) is a recently discovered vitivirus infecting grapevines. Historically, viruses in the genus Vitivirus have been associated with the grapevine rugose wood disease. Based on new and previously reported GVG isolates, primers and probes were developed for real-time RT-PCR. The developed assay successfully detected the virus in infected plants during dormancy and the growing season. A field study of 4327 grapevines from Croatian continental and coastal wine-growing regions confirmed the presence of GVG in 456 (~10.5%) grapevines from three collection plantations and 77 commercial vineyards, with infection rates ranging from 2% to 100%. Interestingly, the virus was confirmed only in vines considered to be Croatian autochthonous cultivars, but not in introduced cultivars. A 564-nucleotide long portion of the coat protein gene from previously known and newly characterized GVG isolates had nucleotide and amino acid identities ranging from 89% to 100% and from 96.8% to 100%, respectively. Phylogenetic analysis revealed five distinct groups, with isolates originating from the same site being close to each other, indicating possible local infection. The information presented in this manuscript sets the stage for future studies to better understand the ecology and epidemiology of GVG and the possible need for inclusion in certification schemes.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants11182341