Virus Genes

, Volume 55, Issue 5, pp 563–573 | Cite as

Evolutionary forces at work in partitiviruses

  • Karel PetrzikEmail author
Review Paper


The family Partitiviridae consists of dsRNA viruses with genome separated into two segments and encoding replicase and capsid protein only. We examined the nucleotide diversity expressed as the ratio dN/dS of nonsynonymous and synonymous substitutions, which has been calculated for 12 representative viruses of all five genera of partitiviruses. We can state that strong purifying selection works on both the RdRp and CP genes and propose that putative positive selection occurs also on the RdRp genes in two viruses. Among the 95 evaluated viruses, wherein both segments had been sequenced, 8 viruses in betapartitiviruses and 9 in alphapartitiviruses were identified as reassortment candidates because they differ extremely in their CP identity even as they are related in terms of RdRp. Furthermore, there are indications that reassortants are present among isolates of different viruses.


Capsid protein Negative/positive selection Reassortment RNA polymerase Symbiosis 



This work has been funded by institutional support RVO60077344 and Grant MEMOBiC of the Ministry of Education, Youth and Sports of the Czech Republic.

Compliance with ethical standards

Conflict of interest

The author declares no conflict of interest.

Ethical approval

This article does not contain any experiments with human participants or animals and is in compliance with ethical standards for research.

Supplementary material

11262_2019_1680_MOESM1_ESM.docx (56 kb)
Supplementary material 1 (DOCX 55 kb)
11262_2019_1680_MOESM2_ESM.docx (23 kb)
Supplementary material 2 (DOCX 23 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Plant Virology, Institute of Plant Molecular BiologyBiology Centre of the Czech Academy of SciencesČeské BudějoviceCzech Republic

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