Characterization of yam mosaic viruses from Brazil reveals a new phylogenetic group and possible incursion from the African continent

Mendoza, Alejandro Risco; Margaria, Paolo; Nagata, Tatsuya; Winter, Stephan; Blawid, Rosana

doi:10.1007/s11262-022-01903-x

Cited by 10 publications

(13 citation statements)

References 62 publications

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“…Accessing yam samples from diverse geographical origins will also assist in studying the extent to which the diversity of specific yam viruses is determined by their geographical origin. Recent studies by Mendoza et al [45] built on the efforts undertaken previously by Bousalem et al [39] to unravel the geographical clustering of YMV diversity. Besides identifying a new phylogroup of YMV in Brazil, phylogeographic analysis [45] traced the most recent common ancestor of YMV in Cameroon back to around 1850 in plants of the D. cayenensis-rotundata complex.…”

Section: Diversity Of Yam Virusesmentioning

confidence: 99%

“…Recent studies by Mendoza et al [45] built on the efforts undertaken previously by Bousalem et al [39] to unravel the geographical clustering of YMV diversity. Besides identifying a new phylogroup of YMV in Brazil, phylogeographic analysis [45] traced the most recent common ancestor of YMV in Cameroon back to around 1850 in plants of the D. cayenensis-rotundata complex. The spread of YMV to D. trifida in French Guiana was estimated to have occurred about 80 years ago, and more recently to D. alata in Burkina Faso and Puerto Rico about 53 and 30 years ago, respectively.…”

Section: Diversity Of Yam Virusesmentioning

confidence: 99%

“…The spread of YMV to D. trifida in French Guiana was estimated to have occurred about 80 years ago, and more recently to D. alata in Burkina Faso and Puerto Rico about 53 and 30 years ago, respectively. Interestingly, Mendoza et al [45] reported that the genetic diversity of YMV was more closely linked to geographical location rather than host yam species. A similar study carried out on YMMV supported an Asian-Pacific origin of YMMV in the D. alata species, followed by a geographical dispersion of this virus probably through the long-distance movement of infected germplasm [46].…”

Section: Diversity Of Yam Virusesmentioning

confidence: 99%

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Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Diouf

Festus

Silva

et al. 2022

Viruses

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Viruses are a major constraint for yam production worldwide. They hamper the conservation, movement, and exchange of yam germplasm and are a threat to food security in tropical and subtropical areas of Africa and the Pacific where yam is a staple food and a source of income. However, the biology and impact of yam viruses remains largely unknown. This review summarizes current knowledge on yam viruses and emphasizes gaps that exist in the knowledge of the biology of these viruses, their diagnosis, and their impact on production. It provides essential information to inform the implementation of more effective virus control strategies.

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Section: Diversity Of Yam Virusesmentioning

confidence: 99%

Section: Diversity Of Yam Virusesmentioning

confidence: 99%

Section: Diversity Of Yam Virusesmentioning

confidence: 99%

See 1 more Smart Citation

Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Diouf

Festus

Silva

et al. 2022

Viruses

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“…This result highlights the high level of circulation of viruses in all yam production areas in Guadeloupe that have been known to occur there for decades, such as YMV, YMMV, badnaviruses and potexviruses [4,[8][9][10], or that were characterised more recently, such as CoV1, DMaV, YaV1 and macluraviruses [11][12][13][14]. Among these viruses, YMMV was found to be predominant in all sampled yam species except D. rotundata, which is known to be mainly infected by YMV [5,16] and DMaV [43]. YaV1 was the second most prevalent virus (55.9%) and was mainly detected in D. alata (66.8%), considering that 80.3% of all the collected samples originated from this species.…”

Section: Prevalence and Diversity Of Yam Viruses In Guadeloupementioning

confidence: 70%

“…The decrease in local production results from a combination of factors, including changes in land use and the impact of pathogens, including viruses. For example, it is assumed that the near disappearance of D. trifida from the Caribbean and the Amazon region, from which this species originates, likely results from its high sensitivity to yam mosaic virus (YMV) [4], a potyvirus originating from Africa, whose worldwide spread likely occurred through the exchange of infected yam germplasm [5].…”

Section: Introductionmentioning

confidence: 99%

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Diouf

Guyader

Gaspard

et al. 2022

Viruses

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The epidemiology of yam viruses remains largely unexplored. We present a large-scale epidemiological study of yam viruses in Guadeloupe based on the analysis of 1124 leaf samples collected from yams and weeds. We addressed the prevalence of cucumber mosaic virus (CMV), Cordyline virus 1 (CoV1), Dioscorea mosaic associated virus (DMaV), yam asymptomatic virus 1 (YaV1), yam mosaic virus (YMV), yam mild mosaic virus (YMMV), badnaviruses, macluraviruses and potexviruses, and the key epidemiological drivers of these viruses. We provide evidence that several weeds are reservoirs of YMMV and that YMMV isolates infecting weeds cluster together with those infecting yams, pointing to the role of weeds in the epidemiology of YMMV. We report the occurrence of yam chlorotic necrosis virus (YCNV) in Guadeloupe, the introduction of YMMV isolates through the importation of yam tubers, and the absence of vertical transmission of YaV1. We identified specific effects on some cropping practices, such as weed management and the use of chemical pesticides, on the occurrence of a few viruses, but no crop-related factor had a strong or general effect on the overall epidemiology of the targeted viruses. Overall, our work provides insights into the epidemiology of yam viruses that will help design more efficient control strategies.

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Molecular diversity of yam virus Y and identification of banana mild mosaic virus isolates infecting yam (Dioscorea spp.)

Diouf,

Guyader,

Nopoly

et al. 2023

Arch Virol

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Two members of the family Betaflexiviridae associated with yam (Dioscorea spp.) have been described so far: yam latent virus (YLV) and yam virus Y (YVY). However, their geographical distribution and molecular diversity remain poorly documented. Using a nested RT-PCR assay, we detected YVY in D. alata, D. bulbifera, D. cayenensis, D. rotundata, and D. trifida in Guadeloupe, and in D. rotundata in Côte d'Ivoire, thus extending the known host range of this virus and geographical distribution. Using amplicon sequencing, we determined that the molecular diversity of YVY in the yam samples analyzed in this work ranged between 0.0 and 29.1% and that this diversity is partially geographically structured. We also identified three isolates of banana mild mosaic virus (BanMMV) infecting D. alata in Guadeloupe, providing the first evidence for BanMMV infection in yam.

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Characterization of yam mosaic viruses from Brazil reveals a new phylogenetic group and possible incursion from the African continent

Cited by 10 publications

References 62 publications

Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Molecular diversity of yam virus Y and identification of banana mild mosaic virus isolates infecting yam (Dioscorea spp.)

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