Evolutionary dynamics of bipartite begomoviruses revealed by complete genome analysis
| Autor: | Renato N Nascimento, José Fernando Coelho da Silva, Talita Bernardon Mar, Iraildes Pereira Assunção, Márcio Tadeu Godinho, Osvaldo F. L. Sande, Camila G. Ferro, F. Murilo Zerbini, Roberto Ramos-Sobrinho, Alison T. M. Lima, Gaus Silvestre de Andrade Lima, César A. D. Xavier |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Reassortment Genome Viral Biology 010603 evolutionary biology 01 natural sciences Genome Evolution Molecular 03 medical and health sciences Genetics Coding region Evolutionary dynamics Ecology Evolution Behavior and Systematics Phylogeny Plant Diseases Base Sequence Begomovirus biology.organism_classification Multipartite 030104 developmental biology Evolutionary biology Viral evolution GenBank DNA Viral Genetic structure |
| Popis: | Several key evolutionary events marked the evolution of geminiviruses, culminating with the emergence of bipartite genomes represented by viruses classified in the genusBegomovirus. 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. We performed a parallel evolutionary analysis of the DNA-A and DNA-B components 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 analyzed. 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 components, differences in the genetic structure between DNA-A and DNA-B were also observed, with cognate components 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 components. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|