Distribution and Characterization of Rice yellow mottle virus: A Threat to African Farmers

Kouassi, N.; N’Guessan, P.; Albar, Laurence; Fauquet, Claude; Brugidou, Christophe

doi:10.1094/pd-89-0124

Cited by 100 publications

(93 citation statements)

References 57 publications

(92 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The RYMV disease is characterized by mottling and yellowing symptoms, stunted growth, reduction of tiller formation and grain sterility [12]. Rice yellow mottle virus disease may also cause complete crop failure that resulted from incomplete panicle emergence and necrosis.…”

Section: Introductionmentioning

confidence: 99%

“…The virus can be detected by symptoms and direct antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) using polyclonal antibodies [13]. Disease severity refers as effect of the virus on an individual rice plant covered by symptoms and measured either by necrosis or stunting and decrease in plant height that can be used to gauge yield losses [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking Rice yellow mottle virus Strains in Tanzania

Hubert¹,

Lyimo²,

Luzi-Kihupi³

2017

AJPS

View full text Add to dashboard Cite

Rice yellow mottle virus (RYMV) is a major biotic constraint for rice production in Africa. The resistance-breaking ability of Tanzanian RYMV strains and phylotypes (S4lm (Tz526), S4lv (Tz516), S4ug (Tz508), S5 (Tz429, Tz445), S6c (Tz486) and S6w (Tz539)) were tested by inoculating rice cultivars with RYMV1 resistant alleles (Gigante (rymv1-2), Tog12387 (rymv1-3), Tog5681 (rymv1-3), Tog5438 (rymv1-4), Tog5672 (rymv1-4+rymv2) and Tog5674 (rymv 1-5)) in a screen house. The results revealed multiple resistance-breaking strains and phylotypes on resistant cultivars Gigante, Tog12387, Tog5438 and Tog5681. However, the resistance breakdown was highly variable depending on the strain used, and disease severity ranged from 11% -75.3%. The virulence potential of RYMV phylotype S4lm (Tz526) was similar to phylotype S6w (Tz539). The impact of strains and phylotypes on yield and its components in rice cultivars revealed highly significant differences (P ≤ 0.001). The lowest percent plant height reduction (2.8%), number of tillers per plant (2.5%), 1000 grain weight (2.7%), spikelet sterility (3.5%) and yield (5%) was recorded in rice cultivar Gigante inoculated with RYMV phylotype S6c (Tz486). Phylotype S6c (Tz486) despite being less virulent compared to other strains, its virus titer in rice cultivar Gigante (1.833) was higher than S5 (Tz429, Tz445) inoculated on Tog5674 (0.171, 0.207) and S6w (Tz539) inoculated on Tog5681 (0.283). The resistant-breaking strain S5 (Tz445) multiplied in resistant rice cultivar Tog5674 without inducing visible symptoms but showed positive reaction to ELISA with low virus titer. The strain S5 overcame wide range of resistant alleles including rymv1-2, rymv1-3, rymv1-4 and rymv1-5 resistance, with exception of rymv1-4 + rymv2. The current results gave a new perspective for future identification of resistance-breaking mutations through sequencing of the RYMV genome in infected rice cultivars and mutagenesis of an infectious viral clone useful for future RYMV resistant breeding programs.How to cite this paper: Hubert, J., Lyimo, H

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking Rice yellow mottle virus Strains in Tanzania

Hubert¹,

Lyimo²,

Luzi-Kihupi³

2017

AJPS

View full text Add to dashboard Cite

show abstract

“…Since then, it has been found and isolated in East and in West Africa (Kouassi et al 2005). Streaking, mottling, yellowing, and malformation of leaves, and death of infected young plants are all typical signs of RYMV infection (Bakker 1970(Bakker , 1974Fauquet and Thouvenel 1977).…”

Section: Introductionmentioning

confidence: 99%

Modes of transmission and stability of Rice yellow mottle virus

Uke¹,

Tibanyendela²,

Ikeda³

et al. 2014

Journal of Plant Protection Research

View full text Add to dashboard Cite

Rice yellow mottle virus (RYMV) is the most important rice virus in Africa. We examined RYMV transmission via soil and water contaminated with RYMV-infected rice plants and by serial cutting with RYMV-contaminated scissors. Transmission of RYMV via dried rice straw kept at 27°C was also examined. The results showed the virus could be transmitted via soil and water, and by scissors. Rice straw that was RYMV-infected was not infective if it was dried and was kept longer than 42 days. By insect transmission experiments and ELISA, long-horned grasshoppers (Conocephalus spp.) were found to be a possible vector of RYMV in Uganda.

show abstract

“…Il s'agit de la Panachure jaune ou Rice Yellow Mottle Virus (RYMV), une maladie virale causée par un sobemovirus. Décrite pour la première fois en 1970 au Kenya (Bakker, 1970), cette virose est aujourd'hui présente dans la plupart des zones de productions de riz en Afrique y compris le Madagascar (Abo et al, 1998 ;Traoré et al, 2001, Kouassi et al, 2005Bouet et al, 2010). La maladie, circonscrite au continent africain, est transmise de façon mécanique par un complexe biotique et abiotique impliquant les insectes, des rongeurs et des ruminants puis aussi par le vent (Sarra and Peters, 2003;Sarra et al, 2004).…”

Section: Introductionunclassified

“…Elle se manifeste par une décoloration des feuilles (panachure jaune), un retard de floraison, une sortie partielle puis une stérilité des épillets et un rabougrissement des plants infectés (Backer, 1974 ;Amancho et al, 2009). Les pertes de récolte dues au RYMV sont fréquentes et généralement importantes (29,5 à 100% en Côte d'Ivoire : Sanyang, 2006, Amancho et al, 200956 à 100% au Niger : Basso et al, 2006 ;10 à 100% en Afrique : Awoderu, 1991, Kouassi et al, 200519 à 90,8% en Sierra Leone : Fomba et al, 1986). En Côte d'Ivoire, la forte pression de la maladie a contraint dans plusieurs localités du pays, des paysans à l'abandon de leurs rizières (Vautrin, 1988).…”

Section: Introductionunclassified

Effet de la fertilisation azotée et phosphorée sur le développement de la Panachure jaune en riziculture aquatique en Côte d’Ivoire

Bouet¹,

Amancho²,

Sanogo³

et al. 2013

Int. J. Bio. Chem. Sci

View full text Add to dashboard Cite

; Tel : (225) 01 50 10 93/(225) 07 42 64 85, Tél./Fax : (225) 32 77 17 00 RESUME La crise mondiale du riz survenue en 2008 a montré l'impérative nécessité pour les pays tributaires des importations comme la Côte d'Ivoire, d'assurer leur autosuffisance. La fertilisation minérale figure parmi les cinq axes stratégiques définis pour l'accroissement de la production rizicole en Côte d'Ivoire. Sachant l'effet stimulateur de l'engrais azoté sur le développement de certaines maladies telle que la Pyriculariose du riz, un essai a été conduit dans le but de savoir l'influence d'une application optimale de l'azote sur l'épidémie de la Panachure jaune du riz ou Rice Yellow Mottle Virus (RYMV). L'étude a été réalisée selon un dispositif expérimental en SPLIT-PLOT comportant quatre niveaux d'azote (0 kg N Ha -1 , 30 kg N Ha -1 , 60 kg N Ha -1 , 120 kg N Ha -1 ), trois niveaux de phosphore (0 kg P Ha -1 , 13 kg P Ha -1 , 26 kg N Ha -1 ) et 10 génotypes de riz irrigué. Les résultats ont montré que le phosphore et l'interaction NxP n'ont aucun effet significatif sur l'épidémie de RYMV. A l'opposé, les analyses ont mis en évidence un effet significatif de l'azote sur l'incidence de la Panachure jaune à des doses comprises entre 0 et 30 Kg N Ha -1 . Cet intervalle de doses étant en deçà de celui des doses recommandées en Côte d'Ivoire, l'intensification de la riziculture aquatique par une fertilisation azotée optimale, n'aura pas d'incidence significative sur le développement de la Panachure jaune. Il faudra cependant sensibiliser les riziculteurs sur l'intérêt d'appliquer des doses d'engrais recommandées dans la lutte contre la virose.

show abstract

Distribution and Characterization of Rice yellow mottle virus: A Threat to African Farmers

Cited by 100 publications

References 57 publications

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking <i>Rice yellow mottle virus</i> Strains in Tanzania

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking <i>Rice yellow mottle virus</i> Strains in Tanzania

Modes of transmission and stability of Rice yellow mottle virus

Effet de la fertilisation azotée et phosphorée sur le développement de la Panachure jaune en riziculture aquatique en Côte d’Ivoire

Contact Info

Product

Resources

About

Distribution and Characterization of Rice yellow mottle virus: A Threat to African Farmers

Cited by 100 publications

References 57 publications

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking &lt;i&gt;Rice yellow mottle virus&lt;/i&gt; Strains in Tanzania

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking &lt;i&gt;Rice yellow mottle virus&lt;/i&gt; Strains in Tanzania

Modes of transmission and stability of Rice yellow mottle virus

Effet de la fertilisation azotée et phosphorée sur le développement de la Panachure jaune en riziculture aquatique en Côte d’Ivoire

Contact Info

Product

Resources

About

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking <i>Rice yellow mottle virus</i> Strains in Tanzania

Pathogenic Variation and Occurrence of Multiple Resistance-Breaking <i>Rice yellow mottle virus</i> Strains in Tanzania