Identification of quantitative trait loci (QTL) associated with sheath blight tolerance in rice

Koshariya, Ashok Kumar; Kumar, Indra; Pradhan, Ashish; Shinde, Umesh; Verulkar, Satish; Agrawal, Toshy; Kotasthane, Anil S.

doi:10.5958/0975-6906.2018.00025.1

Cited by 4 publications

(3 citation statements)

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“…Several earlier studies indicate that the tolerance against sheath blight disease in rice is a quantitative trait governed by polygenes ( Xu et al, 2011 ; Koshariya et al, 2018 ). Therefore, it is essential to map the genomic regions governing quantitative variation for tolerance among the source germplasm.…”

Section: Crop Improvement Strategies Against R Solanimentioning

confidence: 99%

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

et al. 2022

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Sheath blight caused by necrotrophic fungus Rhizoctonia solani Kühn is one of the most serious diseases of rice. Use of high yielding semi dwarf cultivars with dense planting and high dose of nitrogenous fertilizers accentuates the incidence of sheath blight in rice. Its diverse host range and ability to remain dormant under unfavorable conditions make the pathogen more difficult to manage. As there are no sources of complete resistance, management through chemical control has been the most adopted method for sheath blight management. In this review, we provide an up-to-date comprehensive description of host-pathogen interactions, various control measures such as cultural, chemical, and biological as well as utilizing host plant resistance. The section on utilizing host plant resistance includes identification of resistant sources, mapping QTLs and their validation, identification of candidate gene(s) and their introgression through marker-assisted selection. Advances and prospects of sheath blight management through biotechnological approaches such as overexpression of genes and gene silencing for transgenic development against R. solani are also discussed.

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Section: Crop Improvement Strategies Against R Solanimentioning

confidence: 99%

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

et al. 2022

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“…This disease is caused by Rhizoctonia solani Kuhn (Teleomorph: Thanetophorus cucumeris (Frank) Donk). Rice crops with high attainable yields (Koshariya et al, 2018) are exclusively affected. Yield loss estimate 0−50% in susceptible cultivars has been reported under favorable environmental conditions (Lee andRush, 1983, Slaton et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Phenotypic Screening of F3 Rice (Oryza sativa L.) Population Resistance Associated with Sheath Blight Disease

Timsina¹,

Thera²,

Naveenkumar³

2022

IJBSM

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The experiment was conducted during July–December, 2019 in the Agricultural Research Farm Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India. One hundred and twenty-two F3 rice populations from the cross made between IC277332 (susceptible parent)×IC277275 (moderately resistant parent) were evaluated against sheath blight disease under field conditions. The area under disease progress curve (AUDPC) values categorized rice population into four groups viz., moderately resistant (24), moderately susceptible (38), susceptible (40), and highly susceptible (20). A moderate resistance level to the disease was identified during the study in 24 lines (19.6%) with a mean Percentage Disease Index (PDI) of 12.22%−36.6%. Furthermore, 38 individuals showed moderate susceptibility with AUDPC values (1012−1446 day-1). The maximum PDI and AUDPC value were 76.11 and 2325.56, and the minimum PDI and AUDPC values were 22.78 and 622.22, respectively. The principal component (PCA) biplot analysis showed 71.62% and 12.05% variation, respectively. Unweighted Pair Group Method of Arithmetic Means (UPGMA) cluster analysis grouped the 122 individuals into two major clusters, A and B and sub-clusters. These findings indicated that no rice line resistant to sheath blight had been identified. However, few population lines exhibited moderate resistance, which can be utilized as donor lines to generate sheath blight-resistant rice cultivars. These findings will provide a solid basis for our future breeding and screening activities at the institution.

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“…Moreover, assessing the resistance to sheath blight in paddy fields is a very challenging task as the resistance is greatly influenced by agronomic traits such as plant height, the density of plants (Pinson et al, 2005), tillering and heading date (Pan et al, 1999). Studies suggested that resistance to R. solani in rice is a complex, quantitative trait that is generally controlled by polygenes (Sha and Zhu, 1989;Pinson et al, 2005;Koshariya et al, 2018). As a result, to date there is no single report of the sheath bight resistant rice germplasm across the world (Zeng et al, 2011;Shi et al, 2020;Bhunkal et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of F2:3 rice population resistant to Rhizoctonia solani Kuhn inciting sheath blight disease

Thera¹,

Timsina²,

Naveenkumar

et al. 2022

ECJ

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Rice sheath blight caused by the soil-borne fungal pathogen Rhizoctonia solani Kuhn is an economically important disease in rice resulting in enormous yield losses worldwide. In the present investigation, a population constituting F3 lines resulted from the cross made between IC277332 (susceptible parent) and Tetep (resistant parent) were evaluated for sheath blight resistance and other agronomic traits over a season. The rice population lines were categorized into four groups viz., moderately resistant (11), moderately susceptible (63), susceptible (24), and highly susceptible (8), based on area under disease progress curve (AUDPC) values. During the study, nine moderate resistant lines showed, less AUDPC values in comparison to Tetep. Furthermore, 63 individuals (60%) exhibited moderate susceptibility with AUDPC values (677-987 per day). The principal component biplot analysis PC1 and PC2 showed 47.08% and 13.19% variation, respectively. The employment of Unweighted Pair Group Method of Arithmetic Means (UPGMA) cluster analysis led to the grouping of the 106 individuals into 2 major clusters A and B. The results suggested that none of the rice lines was resistant to sheath blight disease. However, few lines showed moderate resistance to the disease which can be exploited for the development of sheath blight-resistant cultivars.

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Identification of quantitative trait loci (QTL) associated with sheath blight tolerance in rice

Cited by 4 publications

References 0 publications

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

Phenotypic Screening of F3 Rice (Oryza sativa L.) Population Resistance Associated with Sheath Blight Disease

Evaluation of F2:3 rice population resistant to Rhizoctonia solani Kuhn inciting sheath blight disease

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