Download or read book Disease Resistance and Susceptibility Genes to Bacterial Blight of Rice written by Frank White and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice (Oryza sativa L.) is a valuable resource for understanding the complex processes controlling yield and value-added traits. Bacterial blight (BB) is a vascular disease of rice, caused by strains of Xanthomonas oryzae pv. oryzae (Xoo) and provides insight, both practical and basic, into the concepts of susceptibility and resistance. Basic knowledge has been empirically and, more recently, intentionally exploited for broad and durable resistance to the disease. Bacterial blight involves representatives of most classes of resistance genes (R genes) and pathways for basal plant immunity. The study of BB also revealed novelties not observed in other models, possibly due to the long history of rice cultivation and the constant disease pressure. Conspicuous are the recessive R genes that target the notorious type III Transcription Activator-like effectors (TALes) of Xoo. Results indicate that pathogen and host are currently in a battle over a small patch of ground involving TALes function. At the same time, analyses of rice disease physiology are adding to a growing body of knowledge for plant disease processes and to how these processes are intertwined with disease susceptibility. The basic processes of BB present rich targets for the rapid advances in genome editing.
Download or read book Protecting Rice Grains in the Post Genomic Era written by Yulin Jia and published by BoD – Books on Demand. This book was released on 2019-10-02 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on recent advances in genetic resources, host - pathogen interactions, assay methods, mechanisms of pathogenesis, and disease resistance. Environmentally benign crop protection methods for major rice diseases such as rice blast, sheath blight, bacterial blight, and newly emerged rice diseases such as false smut and bacterial panicle blight disease are included. The content also contains recent rice breeding methods for higher yield and improved disease resistance, rice processing, delicious rice recipes, and food safety. The book includes a comprehensive understanding of Bacillus thuringiensis toxin and its application for crop protection. Holistically, the book demonstrates successful applications of genomics, physiology, chemistry, genetics, pathology, soil science, and food technology to sustainably protect rice crops for global food safety.
Download or read book Advances in International Rice Research written by Jin Quan Li and published by BoD – Books on Demand. This book was released on 2017-03-15 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice provides staple food for more than 50% of the world's population and is an important crop in the world. With the new technologies such as high-throughput genome sequencing and integrated "-omis" methods applied in rice researches, great advancements have been made. This book was aimed to show a glance of new advancements in the international rice researches. The first section of the book introduced rice cultivation and production. As core sections of the book, the second and third sections introduced physiological and genetic mechanisms on grain quality and biotic and abiotic stress resistance as well as breeding. In the last section, we introduced new technologies such as chromatin immunoprecipitation, integrated "-omis" methods, and bistatic interferometry technology in rice research.
Download or read book Rice Improvement written by Jauhar Ali and published by Springer Nature. This book was released on 2021-05-05 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. By 2050, human population is expected to reach 9.7 billion. The demand for increased food production needs to be met from ever reducing resources of land, water and other environmental constraints. Rice remains the staple food source for a majority of the global populations, but especially in Asia where ninety percent of rice is grown and consumed. Climate change continues to impose abiotic and biotic stresses that curtail rice quality and yields. Researchers have been challenged to provide innovative solutions to maintain, or even increase, rice production. Amongst them, the ‘green super rice’ breeding strategy has been successful for leading the development and release of multiple abiotic and biotic stress tolerant rice varieties. Recent advances in plant molecular biology and biotechnologies have led to the identification of stress responsive genes and signaling pathways, which open up new paradigms to augment rice productivity. Accordingly, transcription factors, protein kinases and enzymes for generating protective metabolites and proteins all contribute to an intricate network of events that guard and maintain cellular integrity. In addition, various quantitative trait loci associated with elevated stress tolerance have been cloned, resulting in the detection of novel genes for biotic and abiotic stress resistance. Mechanistic understanding of the genetic basis of traits, such as N and P use, is allowing rice researchers to engineer nutrient-efficient rice varieties, which would result in higher yields with lower inputs. Likewise, the research in micronutrients biosynthesis opens doors to genetic engineering of metabolic pathways to enhance micronutrients production. With third generation sequencing techniques on the horizon, exciting progress can be expected to vastly improve molecular markers for gene-trait associations forecast with increasing accuracy. This book emphasizes on the areas of rice science that attempt to overcome the foremost limitations in rice production. Our intention is to highlight research advances in the fields of physiology, molecular breeding and genetics, with a special focus on increasing productivity, improving biotic and abiotic stress tolerance and nutritional quality of rice.
Download or read book Cloning and Characterization of the Rice Bacterial Blight Disease Resistance Gene XA5 written by Anjali Susan Iyer-Pascuzzi and published by . This book was released on 2006 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bacterial Blight of Rice written by and published by Int. Rice Res. Inst.. This book was released on 1989 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pathogenesis; Epidemiology and ecology; Host resistance and pathogen variation; Genetics and plant breeding; Abstracts.
Download or read book Molecular Plant Microbe Interactions written by Kamal Bouarab and published by CABI. This book was released on 2009-10-12 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, divided into 13 chapters, explores recent discoveries in the area of molecular plant-microbe interactions. It focuses mainly on the mechanisms controlling plant disease resistance and the cross talk among the signalling pathways involved, and the strategies used by fungi and viruses to suppress these defences. Two chapters deal with the role of symbionts (such as the symbiotic actinobacteria and vesicular arbuscular mycorrhizal fungi) during their interactions with plants.
Download or read book Understanding Durable Disease Resistance in Rice written by Seweon Lee and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Both qualitative and quantitative resistance mechanisms are important contributors to disease resistance in rice. To identify useful sources of durable resistance for Korean breeding programs, the distribution of rice blast isolates compatible to widely used resistance (R) genes was analyzed. Interactions of 3,747 Korean rice Magnaporthe oryzae isolates with eight monogenic lines, each harboring a major blast R gene, were tested. Lines with R gene Pi-9 and Pi-5 were susceptible to the fewest M. oryzae isolates, and therefore, this gene might be applied for blast resistance in breeding programs in Korea. Six major blast resistance genes were susceptible to more than 60 % of the population, suggesting limited utility of these genes in breeding programs. Quantitative trait loci (QTL)-based resistance is predicted to provide durable and broad spectrum resistance to rice diseases. A candidate gene approach was applied to a population of 164 recombinant inbred lines to identify sources of quantitative resistance. Resistance gene analogs and defense response genes were mapped on the rice chromosomes, and analyzed for their association with blast and bacterial blight resistance QTL. A total of 21 putative QTL for blast resistance were identified on chromosomes 1, 4, 5, 6, 8, 9 and 12. Four putative QTL for bacterial blight resistance were identified on chromosome 3, 5 and 10. Thirteen RGA markers were associated with 11 different QTL on chromosome 1, 5, 8, and 9. The role of one disease resistance QTL associated gene, Os02g39330, encoding a chitinase was investigated for contributing to basal defense responses. RNAi silencing was used to evaluate contributions of the gene for the resistance to Rhizoctonia solani and M. oryzae. Five transgenic lines harboring the silencing construct and which differed in the level of expression of Os02g39330 were screened for responses to R. solani and M. oryzae. The chitinase gene expression levels were inversely correlated with sheath blight disease severity, suggesting a role for this defense gene in resistance to R. solani. Rice blast disease was not affected by silencing Os02g39330. Both qualitative and QTL-based resistances provide valuable sources of disease resistance, and a combination of R gene Pi-9 and QTL harboring the Os02g39330 chitinase may help to stabilize resistance.
Download or read book Bacterial Diseases of Rice and Their Management written by Deepti Srivastava and published by CRC Press. This book was released on 2023-05-05 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice is a major staple food and a source of nutrition for over 3.5 billion people worldwide. It is, however, susceptible to a number of bacterial diseases that decrease its yield and quality. This book covers the bacterial diseases of rice and their management, focusing on sustainable management methods that involve biological control, conventional breeding, and molecular methods. It covers the biology of rice bacterial blight pathogens, virulence determinants, and host defense factors of bacterial blight pathogen-rice interactions. Different resistance rice cultivars, their resistance loci, and quantitative trait loci mapping in the important rice cultivars are also discussed. The book presents biological studies of the major rice bacterial diseases (rice bacterial brown stripe disease, bacterial leaf streak disease, rice bacterial panicle blight disease, rice bacterial foot rot, sheath brown rot disease) and presents comparative analyses of conventional breeding, and molecular management approaches, along with examples.
Download or read book Genetics and Genomics of Rice written by Qifa Zhang and published by Springer Science & Business Media. This book was released on 2013-08-21 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive coverage of the advances in genetics and genomics research on rice. The chapters feature the latest developments in rice research and cover such topics as the tools and resources for the functional analysis of rice genes, the identification of useful genes for rice improvement, the present understanding of rice development and biological processes, and the application of this present understanding towards rice improvement. The volume also features a perspective on synthesis and prospects, laying the groundwork for future advances in rice genetics and genomics. Written by authorities in the field, Genetics and Genomics of Rice will serve as an invaluable reference for rice researchers for years to come.
Download or read book Biological Control of Rice Diseases written by Samuel S. Gnanamanickam and published by Springer Science & Business Media. This book was released on 2009-07-14 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is suf?cient need to document all the available data on biological control of rice diseases in a small volume. Part of this need rests on the global importance of rice to human life. In the ?rst chapter, I have tried to show that rice is indeed life for most people in Asia and shortages in production and availability can lead to a food crisis. While rice is cultivated in most continents, biological disease management attains special relevance to rice farmers of Africa, Asia, and also perhaps, Latin America. These farmers are resource-poor and might not be able to afford the cost of expensive chemical treatments to control devastating rice pathogens such as Magnaporthe oryzae (blast), Xanthomonas oryzae pv. oryzae (bacterial leaf blight), Rhizoctonia solani (sheath blight) and the virus, rice tungro disease. In an earlier volume that I developed under the title, Biological Control of Crop Diseases (Dekker/CRC Publishers, 2002), I included transgenic crops generated for the management of plant pathogens as biological control under the umbrella of a broad de?nition. Dr Jim Cook who wrote the Foreword for the volume lauded the inclusion of transgenic crops and induced systemic resistance (ISR) as a positive trend toward acceptance of host plant resistance as part of biocontrol. I continue to subscribe to this view.
Download or read book Breeding for Disease Resistance in Rice written by S. Gangopadhyay and published by . This book was released on 1987 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Basis of AvrXa7 Mediated Virulence in Bacterial Blight of Rice written by Ginny Antony and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants have evolved sophisticated mechanisms to protect against microbial invaders of which resistance (R) genes are an important component. R genes mediate specific recognition of pathogens possessing cognate avirulence (avr) gene products, which leads to the induction of plant defense responses and the arrest of pathogen ingress. In contrast to numerous examples of R gene-avr interactions, the susceptible interaction is less well examined. Recent studies on rice and wheat indicate that host resistance to pathogens also involves genetic variability in dominant traits for susceptibility. Xanthomonas oryzae pv.oryzae (Xoo) causes bacterial blight disease in rice, a serious threat in the major rice growing regions of Asia. The pathogenicity of Xoo depends on the translocation of a cocktail of effector proteins into rice cells by a type III secretion system. The family of transcription activator like (TAL) effectors is the one of the most intriguing due to their eukaryotic features and function as major virulence determinants. The specificity of TAL effectors is determined by the nearly identical repeat units at the center of each protein. The major virulence determinant of the strain PXO99A is PthXo1, which hijacks the transcription of the host susceptibility (S) gene Os8N3, an allele of recessive resistance gene xa13. The strains that overcome xa13-mediated resistance harbor alternate major TAL effectors including PthXo2, PthXo3 and AvrXa7. Alternate effectors do not induce Os8N3. This study identified the alternate S gene Os11N3, which is dependent on the effectors AvrXa7 and PthXo3. The effectors bind to specific elements in the proximal promoter regions of the respective S genes and act as transcriptional activators. Our results indicate that rice-Xoo interactions involve gene-for-gene susceptibility to bacterial blight in addition to gene-for-gene resistance.
Download or read book Rice Blast Disease written by Robert S. Zeigler and published by Int. Rice Res. Inst.. This book was released on 1994 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pathogen biology. Cell biology of pathogenesis. Signalling systems and gene expression regulating appressorium formation in magnaporthe grisea. Genetic regulation of sporulation in the rice blast fungus. Genetic interactions in magnaporthe grisea that affect cultivar specific avirulence/virulence on rice. Genomic structure and variability in pyricularia grisea. Molecular genetic approach to the study of cultivar specificity in the rice blast fungus. Avirulence genes and mechanisms of genetic instability in the rice blast fungus. Host plant resistance. International collaboration on breeding for resistance to rice blast. Present knowledge of rice resistance genetics and strategies for magnaporthe grisea pathogenicity and avirulence gene analysis. Mapping of blast resistance genes in rice. Molecular genetic analysis fo the rice bacterial blight resistance locus, Xa21. Current status for gene transfer into rice utilizing variety-independent delivery systems. Pathogen population dynamics and utilization of host plant resistance. Virulencecharacteristics of genetic families of pyricularia grisea in Colombia. Race-specific and rate-reducing resistance to rice blast in US rice cultivars. A strategy for accumulating genes for partial resistance to blast disease in rice within a conventional breeding program. Lineage exclusion: a proposal for linking blast population analysis to resistance breeding. Use of host genetic diversity to control cereal diseases: implications for rice blast. Figs, wasps, nematodes and sitting ducks: rice blast, from the outside looking in. Epidemiology, loss assessment, and management. The economic impact of rice blast disease in China. Current rice blast epidemics and their management in Thailand. Rice blast in west Africa: its nature and control. Understanding and modeling leaf blast effects on crop physiology and yield. Methodology for quantifying rice yield effects of blast. The epidemiological basis for blast management. Using simulation models to explore better strategies for the management of blast disease in temperate rice pathosystems. Blast management in high input, high yield potential, temperate rice ecosystems. Practical approaches to rice blast management in tropical monsoon ecosystems, with special reference to Bangladesh. Rice breeding programs, blast epidemics and blast management in the United States. Strategies for the discovery of rice blast fungicides. Biological control of rice leaf blast. Farmers' perspectives. Crop-livestock interactions: implications for crop improvement in sustainable agriculture. Assessing indigenous and traditional knowledge in farming systems. Rice, reason, and resistance: a comparative study of farmers' vs. Scientists' perception and strategies.
Download or read book Rice written by Wengui Yan and published by BoD – Books on Demand. This book was released on 2014-04-23 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice is a staple food for half of the worlds population mostly in Asia. Productivity of rice has largely been improved since the Green Revolution in 1960s. Further improvement of rice yield is necessary to keep pace with population growth, which is a challenging task for breeders. This book, Rice - Germplasm, Genetics and Improvement, as its name implies, comprehensively reviews current knowledge in germplasm exploration, genetic basis of complex traits, and molecular breeding strategies in rice. In the germplasm part, we highlight the application of wild rice in rice breeding. In the genetics part, most of the complex traits related with yield, disease, quality have been covered. In the improvement part, Chinese experiences in hybrid rice breeding have been summarized together with many molecular breeding practices scattering in different chapters.
Download or read book Genome Engineering for Crop Improvement written by Bidyut Kumar Sarmah and published by Springer Nature. This book was released on 2021-04-18 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves the teachers, researchers and the students as a handy and concise reference as well as guidebook while designing and planning for use of the advanced technologies for crop improvement. The content of the book is designed to cover the latest genome engineering techniques for crop improvement. The conventional breeding has got its limitations such as non-availability of desired genes within the genepool. In many cases, breeding has been highly used and it has nearly reached its highest limit so far as the productivity and production of crops are concerned. However, with increasing need of food and decreasing resources, including water, land, labour, etc., to feed the growing population, the alternative available ways of increasing crop productivity need to be explored and exploited. Genome engineering has a wide scope that includes technologies such as genetic engineering and transgenesis, RNA technologies, CRISPR, cisgenics and subgenics for better productivity and more efficient biotic and abiotic stress management. Therefore, the book is planned to enlighten the readers with the advanced technologies with examples and case studies, whenever possible. Efforts will be made to emphasize on general efforts on various major food crops; however, it would also be made clear that such efforts could be taken as proofs of concepts and that this could be extrapolated keeping the demand in mind.
Download or read book Rice Diseases written by Shu Huang Ou and published by IRRI. This book was released on 1985 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Virus and MLO diseases; Bacterial diseases; Fungus diseases - foliage diseases; Fungus diseases - diseases of stem, leaf sheath and root; Fungus diseases - seedling diseases; Fungus diseases - diseases of grain and inflorescence; Diseases caused by nematodes; Physiological diseases.
