Evaluation of fungicides against sheath blight of rice caused by <i>Rhizoctonia solani</i> (Kuhn.)

Neha, KV; Naveenkumar, R; Balabaskar, P.; Manikandan, Periyasamy

doi:10.5958/2249-5266.2017.00064.9

Cited by 8 publications

(11 citation statements)

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“…A total of 14 different anastomosis groups (AG1 to AG13 and AGBI), which exhibit high variation in colony morphology, host range, aggressiveness and nutritional requirement, have been reported in R. solani (Guillemaut et al 2003;Ahvenniemi et al 2009; Ajayi-Oyetunde and Bradley 2018). Based on sequence homology and on size and shape of sclerotia, R. solani AG1 isolates are subdivided into three subgroups, IA, IB and IC (Sneh et al 1991), all of which cause ShB, with the AG1-IA most commonly reported as the causal agent (Bernardes- De-Assis et al 2009;Gonzalez-Vera et al 2010).…”

Section: Taxonomy and Host Range Of The Pathogenmentioning

confidence: 99%

“…The green or grey ellipsoid lesions (0.5-3 cm) formed on the sheath of leaves in acropetal succession (reviewed in Srinivas et al 2013) give the classical sheath blight symptoms. As plant colonisation by the pathogen extends from leaf sheath to leaf blades, panicles and tillers, the necrotic lesions enlarge to 2-3 cm length and 1 cm width, with beached centres and borders turning purple-brown (reviewed in Srinivas et al 2013). Finally, lesions on the upper part of leaves coalesce, covering entire stem and sheath of the Rani et al (2013) plant leading to stem lodging.…”

Section: Rice Sheath Blight Infection and Disease Cyclementioning

confidence: 99%

“…Sclerotia are white initially and gradually turn brown after maturation as a result of melanin formation in the cell walls. The resilience of sclerotia can be related to the mature form, which has impermeable cell walls and high nutrient content: Melanin is an oxidised phenolic with hydrophobic properties (Willetts and Bullock 1992) reducing cell wall permeability and protecting cells from biological degradation (Sneh et al 1991). Sclerotia have a rich nutrient reserve of proteins, polyphosphate, glycogen and lipids in the cytoplasm (Willetts and Bullock 1992), which serves as an energy source during extreme environmental conditions and also supports reinfection process (Keijer et al 1996).…”

Section: Rice Sheath Blight Infection and Disease Cyclementioning

confidence: 99%

“…The lethal effect of fungicides on detrivores also slows down leaf decomposition and thus impacts nutrient recycling (Hanazato 2001;Chang et al 2005). The detrimental effect derived from fungicide treatment prompted policy actions that impose stringent regulation in several countries (Neha et al 2017). Beside policy development, research and development efforts have been deployed to explore alternatives to the use of chemical fungicides such as use of biological agents to control ShB.…”

Section: Atnpr1 Arabidopsis Thaliana Non-expressor Of Pathogenesis-related Genesmentioning

confidence: 99%

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Sheath blight of rice: a review and identification of priorities for future research

Singh

Mazumdar

Harikrishna

et al. 2019

Planta

140

101

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Section: Taxonomy and Host Range Of The Pathogenmentioning

confidence: 99%

Section: Rice Sheath Blight Infection and Disease Cyclementioning

confidence: 99%

Section: Rice Sheath Blight Infection and Disease Cyclementioning

confidence: 99%

Section: Atnpr1 Arabidopsis Thaliana Non-expressor Of Pathogenesis-related Genesmentioning

confidence: 99%

See 2 more Smart Citations

Sheath blight of rice: a review and identification of priorities for future research

Singh

Mazumdar

Harikrishna

et al. 2019

Planta

140

101

View full text Add to dashboard Cite

show abstract

“…"Among all the biotic stresses, the fungal diseases in rice are the most predominant worldwide" [8]. "The productivity of rice is affected by several fungal pathogens [7], of which Rhizoctonia solani Kuhn causes sheath blight (ShB) disease of rice is one of the most destructive pathogens causing disease in rice and considered as world's significant disease, second most prevalent to the blast disease" [9,10]. "It became more prevalent in most of the improved varieties grown in India" [11].…”

Section: Introductionmentioning

confidence: 99%

Diversity Analysis of Rhizoctonia solani Kuhn Isolates Causing Sheath Blight of Rice in Eastern Uttar Pradesh, India

Thera

Srushtideep

Naveenkumar

et al. 2022

IJPSS

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The sheath blight of rice is a devastating fungal disease, which is caused by Rhizoctonia solani AG1 IA. Twenty-one sheath blight isolates of rice were collected from different locations in eastern Uttar Pradesh, India, to study the variation in cultural, pathogenic, and molecular characterization. All the R. solani isolates were classified into four groups depending on the arrangement of sclerotia, i.e., peripheral, centre, scattered, and last group includes placing at the centre and peripheral 11, 1, 5, and 4 isolates, respectively. Depending on pathogenicity, isolates are grouped into weakly virulent, virulent, and highly virulent, representing 12, 4, and 5 isolates, respectively. The random amplified polymorphic DNA has been successfully used for molecular characterization. In our study, ITS1/ITS4 and AG-1 IA-specific markers yielded reproducible banding patterns. UPGMA cluster analysis revealed two major clusters, A and B, with a 13.85% dissimilarity value. This study does not correlate with virulence, geographical location, and RAPD profile groupings.

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Dissecting genomic regions and underlying sheath blight resistance traits in rice (Oryza sativaL.) using a genome‐wide association study

Naveenkumar,

Anandan,

Prabhukarthikeyan

et al. 2023

Plant Direct

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The productivity of rice is greatly affected by the infection of the plant pathogenic fungus Rhizoctonia solani, which causes a significant grain yield reduction globally. There exist a limited number of rice accessions that are available to develop sheath blight resistance (ShB). Our objective was to identify a good source of the ShB resistance, understand the heritability, and trait interactions, and identify the genomic regions for ShB resistance traits by genome‐wide association studies (GWAS). In the present study, a set of 330 traditional landraces and improved rice varieties were evaluated for ShB resistance and created a core panel of 192 accessions used in the GWAS. This panel provides a more considerable amount of genetic variance and found a significant phenotypic variation among the panel of rice accessions for all the agro‐morphological and disease‐resistance traits over the seasons. The infection rate of ShB and disease reaction were calculated as percent disease index (PDI) and area under the disease progress curve (AUDPC). The correlation analysis showed a significant positive association between PDIs and AUPDC and a negative association between PDI and plant height, flag leaf length, and grain yield. The panel was genotyped with 133 SSR microsatellite markers, resulting in a genome coverage of 314.83 Mb, and the average distance between markers is 2.53 Mb. By employing GLM and MLM (Q + K) models, 30 marker–trait associations (MTAs) were identified with targeted traits over the seasons. Among these QTLs, eight were found to be novel and located on 2, 4, 8, 10, and 12 chromosomes, which explained the phenotypic variation ranging from 5% to 15%. With the GWAS approach, six candidate genes were identified. Os05t0566400, Os08t0155900, and Os09t0567300 were found to be associated with defense mechanisms against ShB. These findings provided insights into the novel donors of IC283139, IC 277248, Sivappuchithirai Kar, and Bowalia. The promising genomic regions on 10 of 12 chromosomes associated with ShB would be useful in developing rice varieties with durable disease resistance.

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Evaluation of fungicides against sheath blight of rice caused by Rhizoctonia solani (Kuhn.)

Cited by 8 publications

References 0 publications

Sheath blight of rice: a review and identification of priorities for future research

Sheath blight of rice: a review and identification of priorities for future research

Diversity Analysis of Rhizoctonia solani Kuhn Isolates Causing Sheath Blight of Rice in Eastern Uttar Pradesh, India

Dissecting genomic regions and underlying sheath blight resistance traits in rice (Oryza sativaL.) using a genome‐wide association study

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