Archives of Virology

, Volume 157, Issue 9, pp 1747–1765 | Cite as

Occurrence of grapevine leafroll-associated virus 5 in Portugal: genetic variability and population structure in field-grown grapevines

  • Filipa Esteves
  • Margarida Teixeira Santos
  • José Eduardo Eiras-Dias
  • Filomena FonsecaEmail author
Original Article


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.


Capsid Protein Capsid Protein Capsid Protein Gene Clone Plant Citrus Tristeza Virus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work and Ms. Filipa Esteves were financed by research projects PTDC/AGR-AAM/65094/2006 and PTDC/AGR-ALI/109869/2009 from Fundação para a Ciência e a Tecnologia.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Filipa Esteves
    • 1
  • Margarida Teixeira Santos
    • 3
  • José Eduardo Eiras-Dias
    • 4
  • Filomena Fonseca
    • 1
    • 2
    Email author
  1. 1.Universidade do AlgarveFaroPortugal
  2. 2.Universidade do AlgarveFaroPortugal
  3. 3.INRB, L-INIAOeirasPortugal
  4. 4.INRB, L-INIADois PortosPortugal

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