Refining the emergence scenario of the invasive recombinant Tomato yellow leaf curl virus -IS76

TYLCV-IS76, a unique recombinant between tomato yellow leaf curl virus (TYLCV) and tomato yellow leaf curl Sardinia virus (TYLCSV), has replaced its parental viruses in southern Morocco. To refine its emergence scenario, its fitness was monitored experimentally in conditions aiming at reproducing na...

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Bibliographic Details
Published in:Virology (New York, N.Y.) N.Y.), 2023-01, Vol.578, p.71-80
Main Authors: Jammes, Margaux, Urbino, Cica, Diouf, Mame Boucar, Peterschmitt, Michel
Format: Article
Language:English
Subjects:
Animals
Begomovirus
Begomovirus - genetics
Bemisia tabaci
Geminivirus
Genetics
Hemiptera
Invasive virus
Life Sciences
Plant Diseases
Plants genetics
Quantitative PCR
Resistance-breaking virus
Solanum lycopersicum
Superinfection
Vegetal Biology
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Summary:TYLCV-IS76, a unique recombinant between tomato yellow leaf curl virus (TYLCV) and tomato yellow leaf curl Sardinia virus (TYLCSV), has replaced its parental viruses in southern Morocco. To refine its emergence scenario, its fitness was monitored experimentally in conditions aiming at reproducing natural situations, i.e. superinfection of plants already infected with parental viruses and competition with other TYLCV/TYLCSV recombinants (LSRec) automatically generated in plants coinfected with TYLCV and TYLCSV. TYLCV-IS76 accumulated significantly more than parental viruses regardless of plant age and superinfection delay. Although TYLCV-IS76 and LSRec both accumulated more than parental viruses in laboratory conditions, LSRec were displaced by TYLCV-IS76 in nature like parental viruses were. TYLCV-IS76 did not exhibit any vector transmission advantage over LSRec and TYLCV the most competitive parental virus. Thus, it is apparently only in the plant compartment that the recombination event that generated TYLCV-IS76, induced the competitiveness advantage by which the last became first. •The fitness of Tomato yellow leaf curl IS76 (IS76) is not affected by plant age.•The fitness of IS76 is not affected by previously infected viruses.•De novo generated TYLCV recombinants accumulate as much as IS76.•De novo generated TYLCV recombinants do not affect the fitness of IS76.•Vector transmissibility was not found to contribute to the invasiveness of IS76.
ISSN:0042-6822
1096-0341
DOI:10.1016/j.virol.2022.11.006