Diversity of tomato-infecting begomoviruses and spatiotemporal dynamics of an endemic viral species of the Brazilian Atl
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ORIGINAL PAPER
Diversity of tomato‑infecting begomoviruses and spatiotemporal dynamics of an endemic viral species of the Brazilian Atlantic rain forest biome Macária F. Duarte1 · Maria E. N. Fonseca2 · Hélcio Costa3 · Niday A. N. Fernandes4 · Ailton Reis2 · Leonardo S. Boiteux2,4 · Rita C. Pereira‑Carvalho1,4 Received: 3 July 2020 / Accepted: 17 November 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Yield losses induced by a complex of begomoviruses are observed across all major tomato-producing areas in Brazil. Tomato severe rugose virus (ToSRV) is the most widespread begomovirus in the country. Conversely, tomato common mosaic virus (ToCmMV) displays a more restricted geographical distribution to areas associated with the Atlantic Rain Forest (ARF) biome, encompassing the States of Espírito Santo–ES, Minas Gerais–MG, and Rio de Janeiro–RJ. Here, we characterized 277 tomato-infecting isolates collected in fields located within the ARF biome from 2006 to 2018. ToSRV displayed the highest prevalence (n = 157), followed by ToCmMV (n = 95) and tomato interveinal chlorosis virus (n = 14). Four other begomoviruses were also detected, but with very low incidences. ToCmMV was the predominant begomovirus in the ARF biome up to 2014–2015 with very low ToSRV incidence. Subsequently, ToSRV became the most prevalent species in ES and RJ, but ToCmMV was still predominating in the “Zona da Mata” meso-region in MG. Due to the remarkable endemic distribution of ToCmMV, we carried out phylogeographical studies of this virus using information from all 28 available isolates with complete DNA–A sequences. The closest common ancestor of ToCmMV was more likely originated around Coimbra–MG area ≈ 25 years before the formal report of this viral species. So far, all surveys indicated tomatoes as the only natural hosts of ToCmMV with outbreaks occurring mainly (but not exclusively) in highland areas. ToSRV shows a more widespread incidence across both highland and lowland areas of the ARF biome. Keywords Geminiviridae · Begomovirus · Tomato severe rugose virus · Tomato common mosaic virus · Spatiotemporal dynamics
Introduction Edited by Karel Petrzik. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11262-020-01812-x) contains supplementary material, which is available to authorized users. * Rita C. Pereira‑Carvalho [email protected] 1
Microbial Biology, University of Brasília (UnB), Brasília, DF 70910‑900, Brazil
2
Embrapa Vegetables (CNPH), Brasília, DF 70770‑017, Brazil
3
INCAPER, Venda Nova do Imigrante, Espírito Santo, ES, Brazil
4
Plant Pathology, University of Brasília (UnB), Brasília, DF 70910‑900, Brazil
The Geminiviridae family is characterized by viruses with twinned particles displaying either one (= monopartite) or two (= bipartite) circular, single–stranded DNA genome(s). Geminiviruses are reported in several tropical and subtropical regions causing significant yield and quality losses in tomatoes (Solanum lycopersicu
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