Yellow leaf of sugarcane is caused by at least three different genotypes of sugarcane yellow leaf virus, one of which predominates on the Island of Réunion

Abu Ahmad Youssef, Rassaby Laurence, Royer Monique, Borg Zara, Braithwaite Kathryn S., Mirkov T.Erik, Irey Mike S., Perrier Xavier, Smith Grant R., Rott Philippe. 2006. Yellow leaf of sugarcane is caused by at least three different genotypes of sugarcane yellow leaf virus, one of which predominates on the Island of Réunion. Archives of Virology, 151 (7) : pp. 1355-1371.

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Abstract : The genetic diversity of sugarcane yellow leaf virus (SCYLV) was analyzed with 43 virus isolates from Réunion Island and 17 isolates from world-wide locations. We attempted to amplify by reverse-transcription polymerase chain reaction (RT-PCR), clone, and sequence four different fragments covering 72% of the genome of these virus isolates. The number of amplified isolates and useful sequence information varied according to each fragment, whereas an amplicon was obtained with diagnostic primers for 59 out of 60 isolates (98%). Phylogenetic analyses of the sequences determined here and additional sequences of 11 other SCYLV isolates available from GenBank showed that SCYLV isolates were distributed in different phylogenetic groups or belonged to single genotypes. The majority of isolates from Réunion Island were grouped in phylogenetic clusters that did not contain any isolates from other origins. The complete six ORFs (5612 bp) of five SCYLV isolates (two from Réunion Island, one from Brazil, one from China, and one from Peru) were amplified, cloned, and sequenced. The existence of at least three distinct genotypes of SCYLV was shown by phylogenetic analysis of the sequences of these isolates and additional published sequences of three SCYLV isolates (GenBank accessions). The biological significance of these genotypes and of the origin of the distinct lineage of SCYLV in Réunion Island remains to be determined. (Résumé d'auteur)

Mots-clés Agrovoc : Saccharum, Virus des végétaux, Variation génétique, Génotype, Phylogénie

Mots-clés géographiques Agrovoc : Réunion

Mots-clés complémentaires : Sugarcane yellow leaf virus

Classification Agris : H20 - Plant diseases

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Abu Ahmad Youssef, CIRAD-AMIS-UMR BGPI (FRA)
  • Rassaby Laurence
  • Royer Monique, CIRAD-AMIS-UMR BGPI (FRA)
  • Borg Zara, BSES (AUS)
  • Braithwaite Kathryn S., BSES (AUS)
  • Mirkov T.Erik, Texas A & M University (USA)
  • Irey Mike S., Sugar Corporation (USA)
  • Perrier Xavier, CIRAD-FLHOR-UPR Multiplication végétative (FRA) ORCID: 0000-0002-0092-003X
  • Smith Grant R., BSES (AUS)
  • Rott Philippe, CIRAD-AMIS-UMR BGPI (FRA) ORCID: 0000-0001-6085-6159

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