First Report of <i>Rice yellow mottle virus</i> on Rice in the Democratic Republic of Congo

Hubert, Judith; Pinel‐Galzi, Agnès; Dibwe, D.; Cinyabuguma, E.; Kabore, A.; Fargette, Denis; Silué, D.; Hébrard, Eugénie; Séré, Y.

doi:10.1094/pdis-06-13-0650-pdn

Cited by 12 publications

(9 citation statements)

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“…The viral expansion continues within these countries and finally, by 2012, the spread of RYMV also includes Burundi, Rwanda and the DRC ( Ndikumana et al. , 2011 ; Hubert et al. , 2013 ).…”

Section: Resultsmentioning

confidence: 99%

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Host ecology determines the dispersal patterns of a plant virus

et al. 2015

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Since its isolation in 1966 in Kenya, rice yellow mottle virus (RYMV) has been reported throughout Africa resulting in one of the economically most important tropical plant emerging diseases. A thorough understanding of RYMV evolution and dispersal is critical to manage viral spread in tropical areas that heavily rely on agriculture for subsistence. Phylogenetic analyses have suggested a relatively recent expansion, perhaps driven by the intensification of agricultural practices, but this has not yet been examined in a coherent statistical framework. To gain insight into the historical spread of RYMV within Africa rice cultivations, we analyse a dataset of 300 coat protein gene sequences, sampled from East to West Africa over a 46-year period, using Bayesian evolutionary inference. Spatiotemporal reconstructions date the origin of RMYV back to 1852 (1791–1903) and confirm Tanzania as the most likely geographic origin. Following a single long-distance transmission event from East to West Africa, separate viral populations have been maintained for about a century. To identify the factors that shaped the RYMV distribution, we apply a generalised linear model (GLM) extension of discrete phylogenetic diffusion and provide strong support for distances measured on a rice connectivity landscape as the major determinant of RYMV spread. Phylogeographic estimates in continuous space further complement this by demonstrating more pronounced expansion dynamics in West Africa that are consistent with agricultural intensification and extensification. Taken together, our principled phylogeographic inference approach shows for the first time that host ecology dynamics have shaped the historical spread of a plant virus.

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“…The viral expansion continues within these countries and finally, by 2012, the spread of RYMV also includes Burundi, Rwanda and the DRC ( Ndikumana et al. , 2011 ; Hubert et al. , 2013 ).…”

Section: Resultsmentioning

confidence: 99%

“…We have assembled a RYMV sequence dataset by retrieving all publicly available ORF4 CP gene sequences from GenBank (on 4 September 2012) and combining these with additional samples made available by collaborators, which have now been published in recent studies ( Hubert et al. , 2013 ; Longué et al.…”

Section: Methodsmentioning

confidence: 99%

Host ecology determines the dispersal patterns of a plant virus

et al. 2015

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“…Yellow mottle disease of rice, caused by a sobemovirus, was first detected in the Democratic Republic of Congo in 2012. A shift from low intensity upland agriculture to lowland irrigated systems may have facilitated establishment of the disease through increased vector density or alternative host plant availability (61). Although economic losses are generally of the most concern, social impacts can also be great.…”

Section: Introductionmentioning

confidence: 99%

Range-Expanding Pests and Pathogens in a Warming World

Bebber

2015

Annu. Rev. Phytopathol.

243

177

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Crop pests and pathogens (CPPs) present a growing threat to food security and ecosystem management. The interactions between plants and their natural enemies are influenced by environmental conditions and thus global warming and climate change could affect CPP ranges and impact. Observations of changing CPP distributions over the twentieth century suggest that growing agricultural production and trade have been most important in disseminating CPPs, but there is some evidence for a latitudinal bias in range shifts that indicates a global warming signal. Species distribution models using climatic variables as drivers suggest that ranges will shift latitudinally in the future. The rapid spread of the Colorado potato beetle across Eurasia illustrates the importance of evolutionary adaptation, host distribution, and migration patterns in affecting the predictions of climate-based species distribution models. Understanding species range shifts in the framework of ecological niche theory may help to direct future research needs.

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“…It is the main viral disease of rice in Africa [9]. Since its discovery, RYMV has been reported also in most countries in Africa [10] like Sierra Leone, Ivory Coast [11], Nigeria [12], Tanzania, Zanzibar, Liberia [13], Burkina Faso, Mali [14], Niger [15], Guinea [16], Rwanda [17], Democratic Republic of Congo [18], and Central African Republic [19]. Thus far, RYMV is reported in 23 countries in Africa South of the Sahara [18][19][20][21] and in all rice ecosystems.…”

Section: Rice Yellow Mottle Virus (Rymv)mentioning

confidence: 99%

“…Many ELISA procedures and protocols are now available [5,30,31]. However, two general procedures are commonly used, that is, direct or indirect antibody sandwich (DAS) method [18,27,31] and the antigen coated plate (ACP) method [31,32].…”

Section: Symptomsmentioning

confidence: 99%

Insect Vectors of Rice Yellow Mottle Virus

et al. 2015

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Rice yellow mottle virus (RYMV) is the major viral constraint to rice production in Africa. RYMV was first identified in 1966 in Kenya and then later in most African countries where rice is grown. Several studies have been conducted so far on its evolution, pathogenicity, resistance genes, and especially its dissemination by insects. Many of these studies showed that, among RYMV vectors, insects especially leaf-feeders found in rice fields are the major source of virus transmission. Many studies have shown that the virus is vectored by several insect species in a process of a first ingestion of leaf material and subsequent transmission in following feedings. About forty insect species were identified as vectors of RYMV since 1970 up to now. They were essentially the beetles, grasshoppers, and the leafhoppers. For this review, we presented the chronology of their identification. Also, the biology, ecology, host range, distribution, and caused damage of these insects were briefly summarized.

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First Report of Rice yellow mottle virus on Rice in the Democratic Republic of Congo

Abstract: International audienc

Cited by 12 publications

References 0 publications

Host ecology determines the dispersal patterns of a plant virus

Host ecology determines the dispersal patterns of a plant virus

Range-Expanding Pests and Pathogens in a Warming World

Insect Vectors of Rice Yellow Mottle Virus

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