Genetic diversity of Rice stripe necrosis virus and new insights into evolution of the genus Benyvirus

Bagayoko Issiaka, Celli Marcos Giovanni, Romay Gustavo, Poulicard Nils, Pinel-Galzi Agnès, Julian Charlotte, Filloux Denis, Roumagnac Philippe, Sérémé Drissa, Bragard Claude, Hebrard Eugénie. 2021. Genetic diversity of Rice stripe necrosis virus and new insights into evolution of the genus Benyvirus. Viruses, 13:737, 12 p.

https://doi.org/10.3390/v13050737

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Quartile : Q2, Sujet : VIROLOGY

Résumé : The rice stripe necrosis virus (RSNV) has been reported to infect rice in several countries in Africa and South America, but limited genomic data are currently publicly available. Here, eleven RSNV genomes were entirely sequenced, including the first corpus of RSNV genomes of African isolates. The genetic variability was differently distributed along the two genomic segments. The segment RNA1, within which clusters of polymorphisms were identified, showed a higher nucleotidic variability than did the beet necrotic yellow vein virus (BNYVV) RNA1 segment. The diversity patterns of both viruses were similar in the RNA2 segment, except for an in-frame insertion of 243 nucleotides located in the RSNV tgbp1 gene. Recombination events were detected into RNA1 and RNA2 segments, in particular in the two most divergent RSNV isolates from Colombia and Sierra Leone. In contrast to BNYVV, the RSNV molecular diversity had a geographical structure with two main RSNV lineages distributed in America and in Africa. Our data on the genetic diversity of RSNV revealed unexpected differences with BNYVV suggesting a complex evolutionary history of the genus Benyvirus.

Mots-clés Agrovoc : virus des végétaux, Oryza sativa, recombinaison, variation génétique, génome

Mots-clés géographiques Agrovoc : Argentine, Burkina Faso, Mali, Bénin, Sierra Leone

Mots-clés complémentaires : benyvirus, rice stripe necrosis virus

Mots-clés libres : RSNV, Benyvirus, Diversity, Recombination

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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