Abstract:
:A comparison of 15 field isolates of grapevine leafroll-associated virus 5 (GLRaV-5) was conducted, based on the analysis of nucleotide sequences of two viral ORFs: the coat protein (CP) and the heat shock protein 90 homolog (HSP90h). After amplification and cloning, the population of viral sequences was analyzed for each isolate, revealing the within-isolate presence of sequence variants for both genes, with one or more major CP variants. Phylogenetic analysis showed the gene sequence variants detected to be exclusive for each isolate. These data, together with estimates of genetic diversity and positive selection, did not reveal evidence of vector-mediated transfer of GLRaV-5. Conversely, a strong effect of host vegetative propagation on divergence dynamics of GLRaV-5 variants was suggested by the isolates from this work The phylogeny of the CP gene further revealed clustering of GLRaV-5 isolates into eight lineages, four of which were detected in our study, revealing a higher diversity than previously described. The information gathered also contributes to firmly establishing GLRaV-5 as a cohesive taxonomic group within the ampeloviruses.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Esteves F,Teixeira Santos M,Eiras-Dias JE,Fonseca Fdoi
10.1007/s00705-012-1371-2subject
Has Abstractpub_date
2012-09-01 00:00:00pages
1747-65issue
9eissn
0304-8608issn
1432-8798journal_volume
157pub_type
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