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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(10): 724-736
DOI: https://doi.org/10.20546/ijcmas.2018.710.080


Variability Studies on Sheath Blight of Rice in Karnataka
O. Manjunatha1*, B. Vidya Sagar1, V. Prakasam2 and C.N. Narendra Reddy1
1Department of Plant Pathology, College of Agriculture, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad - 500 030, Telangana, India
2Department of Plant Pathology, Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500 030, Telangana, India
*Corresponding author
Abstract:

Variability in 20 isolates of Rhizoctonia solani Kühn [Teleomorph: Thanatephorus cucumeris (Frank) Donk] causing sheath blight of rice and weeds, was observed by RAPD and ISSR DNA analysis in conjunction with morphology and pathogenicity studies. Studies on morphological characterization of R. solani isolates showed that isolates were highly variable in mycelial growth, color and sclerotial parameters. Pathogenicity of R. solani was also evaluated and based on their virulence, isolates were classified highly virulent. Genetic diversity of R. solani isolates from different locations using three RAPD and ISSR markers showed less polymorphism at DNA level. The PIC value ranged from 0.82 to 0.88. Relation between cultural/morphological characteristics, Pathogenicity and genetic variation based on RAPD and ISSR markers, and possible reasons for high intra-group variability are discussed.


Keywords: Rhizoctonia solani Kühn [Teleomorph: Thanatephorus cucumeris (Frank) Donk]
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How to cite this article:

Manjunatha, O., B. Vidya Sagar, V. Prakasam and Narendra Reddy, C.N. 2018. Variability Studies on Sheath Blight of Rice in Karnataka.Int.J.Curr.Microbiol.App.Sci. 7(10): 724-736. doi: https://doi.org/10.20546/ijcmas.2018.710.080