Download or read book Genetic Studies on the Resistance to Tan Spot of Wheat and Genetic Similarity Among Isolates of Pyrenophora Tritici repentis written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Studies on the Resistance to Tan Spot of Wheat and Genetic Similarity Among Isolates of i Pyrenophora Tritici repentis i written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tan spot of wheat, caused by the fungus 'Pyrenophora tritici-repentis ' (Died.) Dreches., has become a major component of the leaf spot disease complex in the prairie region in recent years. On susceptible host cultivars 'P. tritici-repentis' induces two distinct symptoms, tan necrosis and extensive chlorosis. To date, five races of 'P. tritici-repentis ' have been identified based on their reaction on a set of wheat differential cultivars. The major objective of this study was to investigate the genetics of resistance to tan spot in several diverse hexaploid wheat cultivars to races 1, 2, and 3, and to the culture filtrate of 'P. tritici-repentis ', race 2. The F1 and F2 generations and F 2:3 and F2:8 families of crosses between the seven selected genotypes were tested with each race in growth room experiments. Two independently inherited genes controlled resistance to tan spot of wheat. A single dominant gene controls resistance to chlorosis induced by races 1 and 3, while a single recessive gene controlsresistance to necrosis induced by races 1 and 2. The same recessive gene controls resistance to necrosis induced by spore-inoculation or culture filtrate infiltration of 'P. tritici-repentis', race 2. This indicated that infiltration with the culture filtrate could replace spore-inoculation when testing for resistance to the necrosis component of tan spot. No segregation was observed in crosses among the resistant cultivars for both the necrosis and the chlorosis components, indicating that the resistant cultivars carried the same resistant genes. The second objective of this study was to assess the genetic similarity among different isolates of 'P. tritici-repentis' and to determine if this similarity is related to race classification or geographic origin of the isolates. Thirty-eight different isolates including other ' Pyrenophora' species were studied with 30 RAPD primers. Cluster analysis and AMOVA indicated that high genetic variability existed among the iso.
Download or read book Fitness Virulence and Genetic Variability in Pyrenophora Tritici repentis Isolates Causing Tan Spot of Wheat in Oklahoma written by Kazi Abdul Kader and published by . This book was released on 2010 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Septoria Diseases of Wheat written by Z. Eyal and published by CIMMYT. This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wheat Blast written by Sudheer Kumar and published by CRC Press. This book was released on 2020-04-09 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat Blast provides systematic and practical information on wheat blast pathology, summarises research progress and discusses future perspectives based on current understanding of the existing issues. The book explores advance technologies that may help in deciding the path for future research and development for better strategies and techniques to manage the wheat blast disease. It equips readers with basic and applied understanding on the identification of disease, its distribution and chances of further spread in new areas, its potential to cause yield losses to wheat, the conditions that favour disease development, disease prediction modelling, resistance breeding methods and management strategies against wheat blast. Features: Provides comprehensive information on wheat blast pathogen and its management under a single umbrella Covers disease identification and diagnostics which will be helpful to check introduction in new areas Discusses methods and protocol to study the different aspects of the disease such as diagnostics, variability, resistance screening, epiphytotic creation etc. Gives deep insight on the past, present and future outlook of wheat blast research progress This book’s chapters are contributed by experts and pioneers in their respective fields and it provides comprehensive insight with updated findings on wheat blast research. It serves as a valuable reference for researchers, policy makers, students, teachers, farmers, seed growers, traders, and other stakeholders dealing with wheat.
Download or read book Integrated Disease Management of Wheat and Barley written by Richard Oliver and published by Burleigh Dodds Series in Agric. This book was released on 2018-09-21 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diseases remain a serious problem in cereal cultivation. The first parts of the book review current research on fungal diseases of cereals and the challenge of fungicide resistance. The book then discusses breeding resistant varieties and methods for integrated disease management of cereals.
Download or read book Genomics of Plant Associated Fungi Monocot Pathogens written by Ralph A. Dean and published by Springer. This book was released on 2014-08-23 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how genomics has revolutionized our understanding of agriculturally important plant-associated fungi. It illustrates some fundamental discoveries about these eukaryotic microbes with regard to the overall structure of their genomes, their lifestyles and the molecular mechanisms that form the basis of their interactions with plants. Genomics has provided new insights into fungal lifestyles and led to practical advances in plant breeding and crop protection, such as predictions about the spread and evolution of new pathogens. This volume focuses on fungi that are important cereal and other monocot plant pathogens and includes: Pyrenophora tritici-repentis, Cochliobolus sp., Colletotrichum sp., Fusarium graminearum, Mycosphaerella graminicola and Mycosphaerella fijiensis, Magnaporthe oryzae, Blumeria graminis and Puccinia graminis.
Download or read book Molecular Polymorphism and Virulence in Pyrenophora Tritici repentis written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tan spot is a major leaf-spotting disease of wheat, found in all the major wheat growing areas of the world. Isolates of 'Pyrenophora tritici-repentis ', the causal fungus of this disease, are currently grouped into six races based on their ability to induce necrosis and chlorosis on a set of differential wheat cultivars/lines. The genetic variability of the pathogen and relationships among the six currently known races of 'P. tritici-repentis ' were investigated using RAPD analysis. A collection of fifty-three isolates from hexaploid and tetraploid wheats originating from Manitoba, Saskatchewan, Alberta, North Dakota, Uruguay and Algeria was used in this study. The results of this study strongly suggested that virulence is the major driving force in the variation and evolution of 'P. tritici-repentis'. (Abstract shortened by UMI.).
Download or read book Helminthosporium blights of wheat Spot blotch and Tan spot written by E. Duveiller and published by CIMMYT. This book was released on 1997 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helminthosporium diseases of wheat: summary of group discussions and recommendations; Evolution of the nomenclature used for Helminthosporium spp. causing leaf blight of wheat; Crop management and breeding for control of Pyrenophora tritici-repentis causing yellow spot of wheat in Australia; Constraints on the integrated management of spot blotch of wheat; Components of the spot disease cycle; Leaf blight diseases and associated soilborne fungal pathogens of wheat in South and Southeast Asia; Foliar blights of wheat in India: germplasm improvement and future challenges for sustainable, high yelding wheat production; Distribution of pathogens causing foliar blight of wheat in India and neighboring countries; Occurrence and significance of spot blotch in Bangladesch; Disease incidence and yield loss due to foliar blight of wheat in nepal; Tan spot in Western Canada; Diseases caused by Bipolaris sorokiniana and Drechslera tritici-repentis in Hungary; Population structure and epidemiology of Bipolaris sorokiniana in the Rice-wheat cropping pattern of Nepal; Tan spot in Central Asia; Breeding for foliar blight resistance in heilongjiang province, China; Incidence and current management of spot blotch of wheat in China; Spot bloch and tan spot of wheat in Paraguay; Research on Pyrenophora tritici-repentis tan spot of wheat in Uruguay; Improving control of tan spot caused by Pyrenophora tritici-repentis in the Mixteca Alta of Oaxaca, Mexico; Importance of spot blotch caused by Bipolaris sorokiniana in Bolivia; Major foliar diseases of triticale in Morocco; Effect of crop rotation and straw mulch inoculation on tan spot and root rot in bread and durum wheat; Breeding for resistance to spot blotch in wheat: global perspective; Evaluating spot blotch resistance of wheat: improving disease assessment under controlled conditions and in the field; Results of the South Asia regional Helminthosporium leaf blight and yield experiment, 1993-94; Breeding for resistance to Helminthosporium blights in Nepal: strategies and genetic gains; Resistance to spot blotch in spring wheat: breeding and genetic studies; Effect of single D-Genome chromosome substitutions from bread wheat on spot blotch resistance of hexaploid triticale; Repeatability of tan spot resistance evaluation in wheat; New approach for clustering breedings genotypes using production variables, yield losses and a double-digit disease scale; Screening wheat for Bipolaris sorokiniana resistance in Vietnan; Ran spot resiatance in tetraploid and hexaploid wheat; Novel genetic diversity for stress tolerance in the triticease: strategic avenues and applied potentials; Evaluating Southern cone wheat germoplasm for spot blotch and ta spot; Variation in resistance to Bipolaris sorokiana and Magnaporthe grisea in wheat grisea in wheat plants regenerated throught embryogenesis; Evaluating spot blotch resistance traits in wheat and related species; In vitro selection for spot blotch resistance in wheat; Identification and inheritance of resistance to foliar blight of wheat; Root rot of wheat: inoculation and screening techniques, yield loss assessment, and germplasm evaluation; Transformation technologies available for enhamcing fungal resistance in wheat; Molecular analyses of toxin (s) produced by Pyrenophora tritici-repentis; Role of host metabolism in action of necrosis toxin from Pyrenophora tritici-repentis; Fungi associated with foliar blight of wheat in warm areas; Characterization of the Pyrenophora tritici-repentis necrosis toxin and a folding precursor; Diversity of Pyrephora tritici-repentis isolates from warm wheat growing areas: pathogenicity, toxin production, and RAPD analysis; Role of root exudates and toxins in susceptibility of yemeni wheat varieties to Cochliobolus sativus; Characterization od Cochliobolus sativuis isolates from the UK and yemen; A xylanase gene from Cochliobolus sativus; Leaf spot diseases of wheat in a conservation tillage study; Control of leaf blights of wheat by elimination of the inoculum source; Incidence and severity of leaf-spotting diseases of spring wheat in Southern Manitoba; Tan spot of wheat in Argentina: importance and disease management strategies; Influence of agronomic practice on foliar blight, and identification of alternate host in the rice-wheat cropping system; Evaluation of tan spot research in Morocco; Controlling leaf spot of wheat throught nutrient management; Phytosanitary effect of the combined application on green manure and antaginistic bacterium Bacillus subtilis on Bipolaris sorokiniana; Seed pathology of tan spot; Wheat reaction to kernel infection by Pyrenophora tritici-repentis and effect on the subsequent crop; List of participants.
Download or read book Molecular Polymorphism and Virulence in Pyrenophora Tritici repentis written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Disease Resistance in Wheat written by Indu Sharma and published by CABI. This book was released on 2012 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disease resistance is one of the major factors that can be improved to sustain yield potential in cultivated crops. This book looks at disease resistance in wheat, concentrating on all the economically important diseases -- their economic impact and geographical spread, breeding for resistance, pathogen variability, resistance mechanisms and recent advances made on resistance genes. Newer strategies for identifying resistance genes and identify resistance mechanisms are discussed, including cloning, gene transfer and the use of genetically modified plants.
Download or read book Summary Record of the 7th Meeting closed Held at Headquarters New York on Friday 26 August 2005 written by and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Pyrenophora Tritici repentis in Wheat and Rye to Study Tan Spot Susceptibility and Insights Into Its Relationship with Stem Rust Resistance written by Sidrat Abdullah and published by . This book was released on 2017 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tan Spot of Wheat written by Timothy Lee Friesen and published by . This book was released on 2001 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Wheat Genetics From Genome to Field written by Yasunari Ogihara and published by Springer. This book was released on 2015-09-15 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings is a collection of 46 selected papers that were presented at the 12th International Wheat Genetics Symposium (IWGS). Since the launch of the wheat genome sequencing project in 2005, the arrival of draft genome sequences has marked a new era in wheat genetics and genomics, catalyzing rapid advancement in the field. This book provides a comprehensive review of the forefront of wheat research, across various important topics such as germplasm and genetic diversity, cytogenetics and allopolyploid evolution, genome sequencing, structural and functional genomics, gene function and molecular biology, biotic stress, abiotic stress, grain quality, and classical and molecular breeding. Following an introduction, 9 parts of the book are dedicated to each of these topics. A final, 11th part entitled “Toward Sustainable Wheat Production” contains 7 excellent papers that were presented in the 12th IWGS Special Session supported by the OECD. With rapid population growth and radical climate changes, the world faces a global food crisis and is in need of another Green Revolution to boost yields of wheat and other widely grown staple crops. Although this book focuses on wheat, many of the newly developed techniques and results presented here can be applied to other plant species with large and complex genomes. As such, this volume is highly recommended for all students and researchers in wheat sciences and related plant sciences and for those who are interested in stable food production and food security.
Download or read book Genetics of Virulence and Toxin Production in Pyrenophora Tritici repentis the Causal Agent of Tan Spot of Wheat written by Hamza Habil Otondo and published by . This book was released on 1995 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Fungal Pathogens written by Melvin Dennis Bolton and published by Springer Science+Business Media. This book was released on 2012 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including reproducible laboratory protocols, this guide to fungal pathogens in plants has been written by expert researchers in the field and includes methods now used to study them, including techniques for model systems such as Arabidopsis thaliana.
