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Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis
Author(s) -
Xavier César A. D.,
Godinho Márcio T.,
Mar Talita B.,
Ferro Camila G.,
Sande Osvaldo F. L.,
Silva José C.,
RamosSobrinho Roberto,
Nascimento Renato N.,
Assunção Iraildes,
Lima Gaus S. A.,
Lima Alison T. M.,
Murilo Zerbini F.
Publication year - 2021
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/mec.15997
Subject(s) - biology , genetics , genome , dna , reassortment , begomovirus , genbank , evolutionary biology , gene , medicine , disease , covid-19 , pathology , infectious disease (medical specialty)
Several key evolutionary events marked the evolution of geminiviruses, culminating with the emergence of divided (bipartite) genomes represented by viruses classified in the genus Begomovirus . This genus represents the most abundant group of multipartite viruses, contributing significantly to the observed abundance of multipartite species in the virosphere. Although aspects related to virus‐host interactions and evolutionary dynamics have been extensively studied, the bipartite nature of these viruses has been little explored in evolutionary studies. Here, we performed a parallel evolutionary analysis of the DNA‐A and DNA‐B segments of New World begomoviruses. A total of 239 full‐length DNA‐B sequences obtained in this study, combined with 292 DNA‐A and 76 DNA‐B sequences retrieved from GenBank, were analysed. The results indicate that the DNA‐A and DNA‐B respond differentially to evolutionary processes, with the DNA‐B being more permissive to variation and more prone to recombination than the DNA‐A. Although a clear geographic segregation was observed for both segments, differences in the genetic structure between DNA‐A and DNA‐B were also observed, with cognate segments belonging to distinct genetic clusters. DNA‐B coding regions evolve under the same selection pressures than DNA‐A coding regions. Together, our results indicate an interplay between reassortment and recombination acting at different levels across distinct subpopulations and segments.