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Book Variability Studies in Rhizoctonia Solani Kuhn Incitant of Sheath Blight of Rice

Download or read book Variability Studies in Rhizoctonia Solani Kuhn Incitant of Sheath Blight of Rice written by B. Rajender and published by . This book was released on 1990 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Variability in Rhizoctonia Solani Kuhn and Management of Sheath Blight of Rice

Download or read book Variability in Rhizoctonia Solani Kuhn and Management of Sheath Blight of Rice written by R. Sudhakar and published by . This book was released on 1996 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sheath Blight Disease of Rice

Download or read book Sheath Blight Disease of Rice written by K. Manibhushan Rao and published by Daya Books. This book was released on 1995 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sheat blight (ShB) is considered as one of the serious diseases of rice in Asian countries and the USA. The increase in ShB incidence is largely due to changes in the rice cultivation methods as well as in the use of early-maturing, semi-dwarf, high-yielding and N-responsive cultivars. Against this background, this monographic study is aimed primarily presenting the status of our knowledge by compiling the literature available as well as the author s own experience on rice diseases over three decades. The book is meant primarily for the graduate students, rice pathologists and extension workers. This compendium should not only stimulated further research but also will be used for ShB management. It traces the history of the disease, the casual agents, its nomenclature, taxonomy, morphology, physiology, variability, histopathology and ultra structure. It is profusely illustrated with excellent plates and number of tables which project the current status in a better way. Also information has been given on the disease management by induced resistance as well as biocontrol and the future resistance as well as biocontrol and the future perspectives on this important rice disease. Contents Chapter 1: History and Distribution; Chapter 2: Symptomatology; Chapter 3: Disease Development; Chapter 4: Yield Losses; Chapter 5: Causal Organism; Nomenclature, Taxonomy, Morphology, Cell and molecular biology, Physiology, Sclerotial growth and maturation, Variability; Chapter 6: Pathogenicity; Chapter 7: Host Range; Chapter 8: Environmental Conditions; Chapter 9: Disease Cycle; Chapter 10: Histopathology; Host penetration, Host colonization, Ultrastructure; Chapter 11: Varietal Resistance; Method of inoculation, The efficacy of the scale, Comparison of the assessment methods; Chapter 12: Physiology of Host-Pathogen Interaction; Carbohydrate metabolism, Nitrogen metabolism, Nitrogen fertilization, Phosphorus and potash fertilization, Detection of fungal mass in situ; Chapter 13: Disease Resistance; Phenol metabolism, Pheno biosynthetic enzymes, Changes in phenol constituents, Effect of PAA on phenol metabolism, Oxidized products of chlorogenic acid, Induced resistance, Genetic basis of host resistance, Stability of horizontal resistance; Chapter 14: Disease Control; Chemical control, Antibiotics, Biological control; Chapter 15: Challenges for the Future; Preamble, Economic losses, Cultural practices, Host resistance, Biocontrol potential.

Book Studies on Some Aspects of Rice Sheath Blight Caused by Rhizoctonia Solani Kuhn

Download or read book Studies on Some Aspects of Rice Sheath Blight Caused by Rhizoctonia Solani Kuhn written by S. Venkata Reddy and published by . This book was released on 1992 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies on Sheath Blight of Rice Oryza Sativa L Caused by Rhizoctonia Solani Kuhn

Download or read book Studies on Sheath Blight of Rice Oryza Sativa L Caused by Rhizoctonia Solani Kuhn written by Nitesh Bhunkal and published by . This book was released on 2014 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Characterization of Variability in Rhizoctonia Solani Causing Sheath Blight of Rice

Download or read book Characterization of Variability in Rhizoctonia Solani Causing Sheath Blight of Rice written by Mehi Lal and published by . This book was released on 2009 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Genetic Diversity Pathogenicity virulence Variation and Population Structure of Rhizoctonia Spp Associated with Rice Sheath Blight in Arkansas and QTL Mapping for Disease Resistance

Download or read book Genetic Diversity Pathogenicity virulence Variation and Population Structure of Rhizoctonia Spp Associated with Rice Sheath Blight in Arkansas and QTL Mapping for Disease Resistance written by Vanina Lilián Castroagudín and published by . This book was released on 2012 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt: No systematic studies of the Rhizoctonia species and subspecies associated with rice sheath blight (ShB) in Arkansas have been conducted, and few studies have examined the genetic diversity of the rice ShB pathogen Rhizoctonia solani Kuhn AG 1 - IA. The objectives of this research were to assess the genetic diversity and the virulence/aggressiveness of isolates of R. solani AG 1 - IA and related Rhizoctonia spp. by specific PCR markers and sequence analysis of the ITS, RPB2 and beta-tubulin genes. Among the isolates examined, a considerable level of inter- and intra-specific variation was identified based on the molecular markers and differences in pathogenicity and pathogenicity/virulence on rice, soybean and tomato. There was significant correlation between the levels of virulence in the different crops. However, no correlation between pathogenicity/virulence differences and genotypic diversity was found. An in-depth genotypic analysis of the R. solani AG 1 - IA population from Arkansas was conducted using a multilocus sequencing analysis and SSR diversity indicated a high level of genotypic diversity and a significant degree of inbreeding. These data fit population structure with a mixed model of reproduction in which some extent of recombination (sexual/parasexual recombination) may occur, followed by clonal expansion of the fittest clones. The third objective of this study was to examine the production of specific toxins among isolates of R. solani and related species, and assess its correlation with pathogenicity/virulence. The ability to produce toxin was assessed by the presence of a signature peak in high pressure liquid chromatography (HPLC) and rice-leaf infiltration assays. Results suggested that no clear correlation exists between the capacity of an isolate to produce toxin in vitro, the ability of the toxin to cause necrosis in susceptible host tissue in an infiltration bioassay, and the capacity of the isolate to cause disease in greenhouse inoculation tests. These support the hypothesis that R. solani AG 1 - IA phytotoxin is a virulence factor with a minor contribution in disease development. The resistance to rice ShB is a polygenic and quantitative trait, and no immunity has been identified. A final objective was to map for potentially new quantitative trait loci (QTL) associated with resistance to ShB (SB-QTLs) in a population derived from a cross of two elite Indica cultivars, 'Fedearroz2000' and 'Palmar'. Results identified one significant SB-QTL with LOD > 3.0 on chromosomes 9, and three significant SB-QTLs with 1.5

Book Variability Studies in Rhizoctonia Solani Kuhn Infecting Selected Cereal Crops

Download or read book Variability Studies in Rhizoctonia Solani Kuhn Infecting Selected Cereal Crops written by Kavya S and published by . This book was released on 2018 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies on Sheath Bligh of Rice Caused by Rhizoctonia Solani Kuhn

Download or read book Studies on Sheath Bligh of Rice Caused by Rhizoctonia Solani Kuhn written by P. Venkateswarlu and published by . This book was released on 2006 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: