The genome formula of a multipartite virus is regulated both at the individual segment and the segment group levels.

"plos publication stage vor-update-to-uncorrected-proof publication update 2024-02-06 data availability files with results of qpcr reactions and scripts used for the statistical analyses are accessible at https://doi org/10 5281/zenodo 10439590 .; data availability files with results of qpcr reactions and scripts used for the statistical analyses are accessible at https://doi org/10 5281/zenodo 10439590 .; data and scripts are available at https://doi org/10 5281/zenodo 10439590 s1 fig symptoms of v faba infected with fbnsv complete (a and c) or fbnsv u2- (b and d) four weeks after agro-inoculation (tif) click here for additional data file s2 fig fbnsv genome formula in incomplete infections fbnsv c- u4- (blue) compared to fbnsv complete (a; grey) or fbnsv c- (b; red). data availability files with results of qpcr reactions and scripts used for the statistical analyses are accessible at https://doi"

"The authors have declared that no competing interests exist."

"This work was funded by Agence Nationale pour la Recherche, ANR Reassort ANR-20-CE02-0016 (YM) and ANR Nanovirus ANR-18-CE92-0028 (SB), as well as by the University of Montpellier MUSE, project MULTIVIR (SB). EP, SB and MB acknowledge support from INRAE dpt. SPE; YM, AB and MB from CNRS, and MB from Univ Montpellier. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript."