Genetic diversity and virulence spectrum of <i>Rhizoctonia solani</i>, the incitant of banded leaf and sheath blight of maize

Kumar, Sanjay; Kaur, Harleen; Hunjan, Mandeep Singh

doi:10.1111/jph.13004

Cited by 7 publications

(3 citation statements)

References 60 publications

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“…A positive correlation coefficient (0.68) was found between the disease severities in relation to symptom expression. Recently, Kumar et al [23] also observed significant variation within relative lesion height with respect to isolates Rss-12 and Rsl-1 which range from 2.0 per cent to 52.6 per cent on inbreed lines (CM-600, LMDR-2, LM-12, LM-11) and hybrid (JH3459, PMH 2 and PMH 4). They also classified isolates into three groups viz., group A (highly virulent), group B (moderately virulent), group C (least virulent) based on the virulence spectrum on different cultivars.…”

Section: Pathogenicmentioning

confidence: 92%

Virulence Spectrum among Rhizoctonia solani f. sp. sasakii Isolates from Multi-Geographical Locations of India

Kumar

Mehra

Kumari

et al. 2022

IJECC

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Rhizoctonia solani f. sp. sasakii (RSS) is a highly devastating soil-borne fungal pathogen inciting banded leaf and sheath blight (BLSB) disease in maize. In India, annually one percent of the total maize yield is reduced by BLSB. Due to continuous occurrence and wide spread of disease, the present experiment was conducted to assess the pathogenic variability among different isolates obtained from multi-geographical locations of India. Pathogenic behaviour of each isolates was predicted through the comparable study of their incubation period, average disease score and disease intensity on the three maize hybrids (Normal maize- HM 8, QPM maize- QPM 9 and sweet corn- HSC I). The incubation period of all the R. solani isolates ranged from 3 to 7 days with average disease score ranged from 2.1 to 7.1depending upon the host and isolate interaction after artificial inoculation. Disease intensity of all the RSS isolates on maize hybrids varied from 8.1 to 52.1% while isolates RSS 29 (New Delhi) and RSS 1 (Karnal) were found highly virulent, in comparison to other forty nine RSS isolates. As these isolates were highly virulent on maize hybrids with average disease score ranged from 6.2 to 7.1, whereas the isolates RS 30 (Dholi) and RS 31 (Dhaula Kuan) were recorded as least virulent, showed resistant disease reaction with average disease score ranged from 1.5 to 2.4.

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Section: Pathogenicmentioning

confidence: 92%

Virulence Spectrum among Rhizoctonia solani f. sp. sasakii Isolates from Multi-Geographical Locations of India

Kumar

Mehra

Kumari

et al. 2022

IJECC

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“…A total of 14 anastomosis groups namely AG1‐ AG13 and AG BI have been reported in Rhizoctonia (Carling et al, 2002; Kumar, Kaur, & Hunjan, 2021). In India, the occurrence of BLSB has been attributed to two species of Rhizoctonia namely R. solani and R. oryzae‐sativae (Kumar, Kaur, & Hunjan, 2021), which consist primarily of anastomosis group AG1‐IA in maize and rice (Kumar, Kaur, & Hunjan, 2021; Kumar, Mehra, Kumari, Sarita, & Yadav, 2022; Singh et al, 2018). Rhizoctonia solani attacks the basal portion (lower leaf and sheath) of maize plants and induces small water‐soaked lesion.…”

Section: Introductionmentioning

confidence: 99%

“…Anastomosis is a significant factor in Rhizoctonia species, leading to unpredictable genetic variations, virulence and posing challenges to maize growers worldwide in disease management. A total of 14 anastomosis groups namely AG1‐ AG13 and AG BI have been reported in Rhizoctonia (Carling et al, 2002; Kumar, Kaur, & Hunjan, 2021). In India, the occurrence of BLSB has been attributed to two species of Rhizoctonia namely R. solani and R. oryzae‐sativae (Kumar, Kaur, & Hunjan, 2021), which consist primarily of anastomosis group AG1‐IA in maize and rice (Kumar, Kaur, & Hunjan, 2021; Kumar, Mehra, Kumari, Sarita, & Yadav, 2022; Singh et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and resistance assessment among maize genotypes against banded leaf and sheath blight (caused by Rhizoctonia solani f. sp. sasakii) utilizing SSR markers

Kumari,

Chauhan,

Kumar

et al. 2023

Journal of Phytopathology

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A field investigation was carried out during the consecutive kharif seasons of 2021 and 2022 to assess the resistance response of 38 maize genotypes against banded leaf and sheath bight (BLSB). The trials were conducted at CCS Haryana Agricultural University, Regional Research Station, Karnal (India) under artificial epiphytotic conditions. Throughout both seasons, six genotypes (HKI 163, HKI 193‐2, HKI 488, IQPMH‐18‐2, HKI 194‐7 and HKI 1128) exhibited resistant reactions, one genotype (HM 8) showed susceptible reaction, whereas 19 genotypes showed moderately resistant response to BLSB. To analyse molecular aspects of BLSB resistance, genomic DNA was extracted and PCR amplification was performed using 22 SSR markers. Ten SSR markers (bnlg238, bnlg161, bnlg127, bnlg339, bnlg615, bnlg1272, phi077, phi080, phi035 and umc1275) revealed distinct banding patterns in resistant and susceptible genotypes. Among these, marker bnlg339 exhibited a band size of 120 bp across 14 genotypes, with six (HKI 163, HKI 193‐2, HQPM 5, IQPMH‐18‐2, HKI 194‐7 and HKI 1128) classified as resistant and eight (HKI 193‐1, HKI 1657, HKI 1378, HPQM 1, HKI 1659, HPQM 2, T Bio 259 ER and HKI 191‐2‐5) as moderately resistant, resembling the amplified profile of the resistant check genotype (HKI 163). Similarly, the markers phi080 and bnlg1272 exhibited differential amplified profile of approximately 150 bp and 240 bp, respectively, in 10 (five resistant and five moderately resistant) and 12 (four resistant and eight moderately resistant) maize genotypes throughout the study. The percentage of polymorphism for the SSR markers varied from 0 to 100%, with an average value of 95.45% per primer among all genotypes. The identification of resistant and moderately resistant genotypes and characterization of specific SSR markers associated with resistance offer practical tools for breeders to develop BLSB‐resistant maize varieties, ultimately enhancing crop resilience and food security.

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Molecular phylogeny of plant pathogenic fungi based on start codon targeted (SCoT) polymorphism

et al. 2023

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Genetic diversity and virulence spectrum of Rhizoctonia solani, the incitant of banded leaf and sheath blight of maize

Abstract: Banded leaf and sheath blight (BLSB), one of the main destructive diseases of maize worldwide, is incited by necrotrophic fungus

Cited by 7 publications

References 60 publications

Virulence Spectrum among Rhizoctonia solani f. sp. sasakii Isolates from Multi-Geographical Locations of India

Virulence Spectrum among Rhizoctonia solani f. sp. sasakii Isolates from Multi-Geographical Locations of India

Genetic diversity and resistance assessment among maize genotypes against banded leaf and sheath blight (caused by Rhizoctonia solani f. sp. sasakii) utilizing SSR markers

Molecular phylogeny of plant pathogenic fungi based on start codon targeted (SCoT) polymorphism

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