Download or read book Genetic Studies of Fusarium Head Blight Resistance in the Winter Wheat Cultivar Ernie written by Shuyu Liu and published by . This book was released on 2003 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium head blight (FHB), also called scab, mainly caused by the fungus Fusarium graminearum Schwabe [telomorph: Gibberella zeae Schw. (Petch)], is a serious disease that affects wheat ( Triticum aestivum L. and T. durum L.) and barley ( Hordeum vulgare L.) in warm, humid areas of the world. Yield losses in the United States during the 1990s were close to $3.0 billion. Genetic resistance is the most effective and economical solution to the yield and quality losses, however, breeding is hindered by a lack of resistance genes. Current genetic studies and breeding programs are focusing on the Chinese cultivar 'Sumai 3' and its derivatives. 'Ernie', a soft red winter wheat cultivar, was released from the Missouri Agricultural Experiment Station in 1995. It has a high level of FHB resistance, yet the genetics of its resistance are not well understood. This research was designed to study the genetics of FHB resistance in Ernie through both molecular and conventional approaches. A set of 244 F 8 recombinant inbred lines were developed from the cross Ernie/MO 94-317. Four assessments of type II FHB resistance including spread, spread with wilt, the Fusarium head blight index (FHBI), and FHBI with wilt were made. All were highly significantly correlated with coefficients ranging from 0.699** to 0.915**. The number of effective factors for FHB resistance in Ernie was estimated as two for spread and four for FHBI. Five QTLs were identified on five different chromosomes (2B, 3B, 4BL, 5A, and 5DL) which were linked to FHBI and FHBI with wilt. The QTLs with larger effects for FHB resistance were on chromosomes 4BL, 5A, and 5DL and explained 10 to 33% of the phenotypic variation. The QTL on 5A was also associated with disease spread and spread with wilt and explained 10 to 12% of the phenotypic variation. All FHB resistant alleles were from Ernie. Multiple regression indicated that these five QTLs explained 36 to 37% of the phenotypic variation for FHBI and FHBI with wilt, respectively. Significant interactions between markers were included in the model and explained 53.8% and 43.2% of the total variation for these two traits, respectively. Based on the chromosome locations, linked markers, and the magnitude of their effects, the QTLs in Ernie differ from those in Sumai 3. Three QTLs for days to flower were identified on chromosomes 2A, 2DS, and 5B. The major QTL on 2DS explained 61.9% of the phenotypic variation. One QTL was also detected on 5AL for absence of awns. The major QTL on 2DS was common between days to flower and spike length; however, neither was common with QTLs for FHB resistance. Generation mean and variance analyses were done on six generations including the parents, F 1 (Ernie/MO 94-317), BC 1 (F 1 /Ernie), BC 2 (F 1 /MO 94-317), and the F 2 . Additive effects were the major effects for both spread and FHBI. Broad-sense heritability estimates for the F 2 were 78.2% and 78.3% for spread and FHBI, respectively, while the narrow-sense heritabilities were 51.3% and 55.4%, respectively. Because of the additivity of these genetic effects, we concluded that pyramiding the genes from Ernie with those from other sources of resistance should enhance the level of FHB resistance in wheat.

Download or read book Genetic Mapping of Quantitative Trait Loci Conditioning Fusarium Head Blight Resistance in Hard Winter Wheat written by Umara Sahar Rana and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium head blight (FHB), also known as 'scab', incited by Fusarium graminearum (Schw), is one of the most damaging fungal diseases in wheat. FHB reduces grain yield drastically, but also grain quality due to shriveled kernels, protein damage, and mycotoxin contamination caused by the fungal infection. Host plant resistance is the most effective and environmentally safe approach to combat this disease. To identify resistance genes from locally adapted cultivars, a population of 178 recombinant inbred lines (RILs) from Overland × Everest was genotyped using single nucleotide polymorphism (SNP) markers derived from genotyping-by-sequencing (GBS). The RIL population was phenotyped for resistance to the initial infection (type I), fungal spread within a spike (type II), mycotoxin (DON) accumulation in grains (type III) and Fusarium damaged kernel (type IV) in repeated greenhouse and field experiments. Seven QTLs were identified on chromosome arms 1AL, 3BL, 4BS, 4BL, 6AL, 6BL 7AS and 7BL for type I resistance. Hard winter wheat cultivar Everest contributes all the resistance alleles except two on chromosome arms 4BS and 6BL, which are contributed by hard winter wheat cultivar Overland. Six QTLs on chromosome regions of 1BL, 4A, 4BS, 5AL, 6BL and 7AS confer type II resistance with the resistance QTLs on 1BL, 4BS, 6BL and 7AS from Everest and on 4A, 4BS, and 5AL from Overland. The type II QTL on chromosome 4BS is overlapped with the reduced height gene Rht-B1. QTLs for type III resistance were mapped on 4BS and 5AL while QTLs for type IV resistance were mapped on chromosome 4BS, 5AL and 7AS and they overlapped with type II resistance in the corresponding chromosome regions. The haplotype analysis showed that genotypes containing multiple QTLs showed significantly higher resistance than those with fewer or no QTLs, indicating that these QTLs have additive effects on FHB resistance. Type I FHB resistance was poorly characterized in the literature. The current study demonstrated that Everest carries several QTLs for type I resistance, thus is a useful native source for type I resistance. Some SNP markers tightly linked with the QTLs for different types of resistance were successfully converted into Kompetitive allele-specific polymerase chain reaction (KASP) assays and could be used in marker-assisted breeding for FHB resistance in wheat.

Download or read book Analysis of Resistance to Fusarium Head Blight FHB in Winter Wheat and Evaluation of Genetics and Cultural Practices for FHB Mitigation written by Zesong Ye and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium head blight (FHB) caused by Fusarium graminearum is a fungal disease of wheat that can result in severe yield losses and contaminate grain with deoxynivalenol (DON). Wheat cultivars with different levels of FHB resistance were combined with fungicides application to control FHB. Results showed that foliar fungicide ProsaroTM combined with moderately resistant cultivars greatly reduced the risk of FHB. Integrating fungicide application with moderately resistant cultivars can be an effective strategy in controlling FHB. Quantitative trait loci (QTL) for resistance to FHB related traits were analyzed using a double haploid population. Four QTL associated with FHB resistance was detected on chromosomes 2B, 2D, 4D and 7A. The QTL on chromosome 2B and 4D were found to reduce multiple FHB-related traits and were more frequently detected than QTL on chromosome 2D and 7A. QTL on chromosome 2B and 4D could be valuable for improving FHB resistance in wheat.

Download or read book Genetic Mapping of QTL for Fusarium Head Blight Resistance in Winter Wheat Cultivars Art and Everest written by Marshall Clinesmith and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusarium head blight (FHB) is a fungal disease, mostly commonly associated with F. graminearum, which affects cereal crops such as wheat resulting in substantial yield losses and reductions in grain quality. The onset of the disease can occur rapidly when warm, wet or humid weather coincides with flowering in the spring. The pathogen also produces mycotoxins such as deoxynivalenol (DON) that accumulate in the grain and can be toxic to humans and animals. This results in additional economic losses as contaminated grain must be discarded or blended to reduce the amount of toxin in order to meet federal regulatory limits. Development and deployment of resistant cultivars has proved to be an effective method to combat the disease, and many resistant sources have been reported in the literature with the majority of major resistance coming from Chinese landraces. Transferring resistance from these sources into cultivars adapted to the U.S. has been a slow process due to linkage of FHB resistance genes with poor agronomic traits. Therefore, it is important for breeders to search for sources of resistance in native material adapted to their local conditions. In this study, we aimed to identify quantitative trait loci (QTL) for resistance to spread of FHB within the head (Type II resistance), accumulation of DON toxin in grain (Type III resistance), and resistance to kernel infection (Type IV resistance). Plant material consisted of 148 doubled haploid (DH) lines from a cross between the two moderately resistant hard red winter wheat (HRWW) cultivars Art and Everest. The study was conducted for two years using a point inoculation technique in a greenhouse in Manhattan, KS. Three QTL conferring resistance to FHB traits were detected on chromosomes 2D, 4B, and 4D. The QTL on chromosomes 4B and 4D overlapped with the major height genes Rht1 and Rht2, respectively. Plant height has shown previous associations with FHB, though the underlying cause of these associations is not well understood. The majority of results have reported increased susceptibility associated with shorter plant types; however, in this study, the haplotype analysis for the Rht-B1 and Rht-D1 loci showed an association between the dwarfing alleles and increased resistance to FHB. This suggests either pleiotropic effects of these loci or perhaps linkage with nearby genes for FHB resistance. Markers close to the peaks of the FHB resistance QTL have the potential for Kompetitive Allele Specific PCR (KASP) marker development and subsequent use in marker assisted selection (MAS) to help improve overall FHB resistance within breeding programs.

Download or read book Quantitative Genetics in Maize Breeding written by Arnel R. Hallauer and published by Springer Science & Business Media. This book was released on 2010-09-28 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize is used in an endless list of products that are directly or indirectly related to human nutrition and food security. Maize is grown in producer farms, farmers depend on genetically improved cultivars, and maize breeders develop improved maize cultivars for farmers. Nikolai I. Vavilov defined plant breeding as plant evolution directed by man. Among crops, maize is one of the most successful examples for breeder-directed evolution. Maize is a cross-pollinated species with unique and separate male and female organs allowing techniques from both self and cross-pollinated crops to be utilized. As a consequence, a diverse set of breeding methods can be utilized for the development of various maize cultivar types for all economic conditions (e.g., improved populations, inbred lines, and their hybrids for different types of markets). Maize breeding is the science of maize cultivar development. Public investment in maize breeding from 1865 to 1996 was $3 billion (Crosbie et al., 2004) and the return on investment was $260 billion as a consequence of applied maize breeding, even without full understanding of the genetic basis of heterosis. The principles of quantitative genetics have been successfully applied by maize breeders worldwide to adapt and improve germplasm sources of cultivars for very simple traits (e.g. maize flowering) and very complex ones (e.g., grain yield). For instance, genomic efforts have isolated early-maturing genes and QTL for potential MAS but very simple and low cost phenotypic efforts have caused significant and fast genetic progress across genotypes moving elite tropical and late temperate maize northward with minimal investment. Quantitative genetics has allowed the integration of pre-breeding with cultivar development by characterizing populations genetically, adapting them to places never thought of (e.g., tropical to short-seasons), improving them by all sorts of intra- and inter-population recurrent selection methods, extracting lines with more probability of success, and exploiting inbreeding and heterosis. Quantitative genetics in maize breeding has improved the odds of developing outstanding maize cultivars from genetically broad based improved populations such as B73. The inbred-hybrid concept in maize was a public sector invention 100 years ago and it is still considered one of the greatest achievements in plant breeding. Maize hybrids grown by farmers today are still produced following this methodology and there is still no limit to genetic improvement when most genes are targeted in the breeding process. Heterotic effects are unique for each hybrid and exotic genetic materials (e.g., tropical, early maturing) carry useful alleles for complex traits not present in the B73 genome just sequenced while increasing the genetic diversity of U.S. hybrids. Breeding programs based on classical quantitative genetics and selection methods will be the basis for proving theoretical approaches on breeding plans based on molecular markers. Mating designs still offer large sample sizes when compared to QTL approaches and there is still a need to successful integration of these methods. There is a need to increase the genetic diversity of maize hybrids available in the market (e.g., there is a need to increase the number of early maturing testers in the northern U.S.). Public programs can still develop new and genetically diverse products not available in industry. However, public U.S. maize breeding programs have either been discontinued or are eroding because of decreasing state and federal funding toward basic science. Future significant genetic gains in maize are dependent on the incorporation of useful and unique genetic diversity not available in industry (e.g., NDSU EarlyGEM lines). The integration of pre-breeding methods with cultivar development should enhance future breeding efforts to maintain active public breeding programs not only adapting and improving genetically broad-based germplasm but also developing unique products and training the next generation of maize breeders producing research dissertations directly linked to breeding programs. This is especially important in areas where commercial hybrids are not locally bred. More than ever public and private institutions are encouraged to cooperate in order to share breeding rights, research goals, winter nurseries, managed stress environments, and latest technology for the benefit of producing the best possible hybrids for farmers with the least cost. We have the opportunity to link both classical and modern technology for the benefit of breeding in close cooperation with industry without the need for investing in academic labs and time (e.g., industry labs take a week vs months/years in academic labs for the same work). This volume, as part of the Handbook of Plant Breeding series, aims to increase awareness of the relative value and impact of maize breeding for food, feed, and fuel security. Without breeding programs continuously developing improved germplasm, no technology can develop improved cultivars. Quantitative Genetics in Maize Breeding presents principles and data that can be applied to maximize genetic improvement of germplasm and develop superior genotypes in different crops. The topics included should be of interest of graduate students and breeders conducting research not only on breeding and selection methods but also developing pure lines and hybrid cultivars in crop species. This volume is a unique and permanent contribution to breeders, geneticists, students, policy makers, and land-grant institutions still promoting quality research in applied plant breeding as opposed to promoting grant monies and indirect costs at any short-term cost. The book is dedicated to those who envision the development of the next generation of cultivars with less need of water and inputs, with better nutrition; and with higher percentages of exotic germplasm as well as those that pursue independent research goals before searching for funding. Scientists are encouraged to use all possible breeding methodologies available (e.g., transgenics, classical breeding, MAS, and all possible combinations could be used with specific sound long and short-term goals on mind) once germplasm is chosen making wise decisions with proven and scientifically sound technologies for assisting current breeding efforts depending on the particular trait under selection. Arnel R. Hallauer is C. F. Curtiss Distinguished Professor in Agriculture (Emeritus) at Iowa State University (ISU). Dr. Hallauer has led maize-breeding research for mid-season maturity at ISU since 1958. His work has had a worldwide impact on plant-breeding programs, industry, and students and was named a member of the National Academy of Sciences. Hallauer is a native of Kansas, USA. José B. Miranda Filho is full-professor in the Department of Genetics, Escola Superior de Agricultura Luiz de Queiroz - University of São Paulo located at Piracicaba, Brazil. His research interests have emphasized development of quantitative genetic theory and its application to maize breeding. Miranda Filho is native of Pirassununga, São Paulo, Brazil. M.J. Carena is professor of plant sciences at North Dakota State University (NDSU). Dr. Carena has led maize-breeding research for short-season maturity at NDSU since 1999. This program is currently one the of the few public U.S. programs left integrating pre-breeding with cultivar development and training in applied maize breeding. He teaches Quantitative Genetics and Crop Breeding Techniques at NDSU. Carena is a native of Buenos Aires, Argentina. http://www.ag.ndsu.nodak.edu/plantsci/faculty/Carena.htm

Download or read book Proceedings of the 11th International Wheat Genetics Symposium 24 29 August 2008 Brisbane Qld Australia written by Rudi Appels and published by Sydney University Press. This book was released on 2008 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers herein are volume 3 of the proceedings of the 11th International Wheat Genetics Symposium, held in Brisbane, Australia, in 2008. The series presents the science of the genetic sciences applied to bread and durum wheats and other species.

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 The Global Fusarium Initiative for International Collaboration written by Tomohiro Ban and published by CIMMYT. This book was released on 2006 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mycotoxin Reduction in Grain Chains written by John F. Leslie and published by John Wiley & Sons. This book was released on 2014-04-29 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cereal grain safety from farm to table Mycotoxin Reduction in Grain Chains examines the ways in which food producers, inspectors, and processors can keep our food supply safe. Providing guidance on identification, eradication, and prevention at each stop on the "grain chain, this book is an invaluable resource for anyone who works with cereal grains. Discussions include breeding and crop management, chemical control, contamination prediction, and more for maize, wheat, sorghum, rice, and other major grains. Relevant and practical in the field, the lab, and on the production floor, this book features critical guidance for every point from farm to table.

Download or read book Fusarium Head Blight of Wheat and Barley written by Kurt J. Leonard and published by American Phytopathological Society. This book was released on 2003 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a comprehensive record of current knowledge on the nature of Fusarium head blight, the damage it causes, and current research on how to control it. The book begins with a historical account of Fusarium head blight epidemics that gives context to recent attempts to control epidemics in wheat and barley. A review of pathogen taxonomy and population biology helps scientists to see relationships among head blight pathogens and other Fusarium species. The information on epidemiology included in this review also provides an understanding of the weather conditions and cultural practices that promote explosive epidemics. New information on infection processes will lead the reader to a better understanding of how to breed for resistance in wheat and barley.

Download or read book Fungal Wheat Diseases Etiology Breeding and Integrated Management written by Maria Rosa Simon and published by Frontiers Media SA. This book was released on 2021-05-31 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fusarium blight scab of Wheat and Other Cereals written by Dimitŭr Atanasov and published by . This book was released on 1920 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Biotechnology and Genetics written by C. Neal Stewart, Jr. and published by John Wiley & Sons. This book was released on 2012-12-13 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to inform and inspire the next generation of plant biotechnologists Plant Biotechnology and Genetics explores contemporary techniques and applications of plant biotechnology, illustrating the tremendous potential this technology has to change our world by improving the food supply. As an introductory text, its focus is on basic science and processes. It guides students from plant biology and genetics to breeding to principles and applications of plant biotechnology. Next, the text examines the critical issues of patents and intellectual property and then tackles the many controversies and consumer concerns over transgenic plants. The final chapter of the book provides an expert forecast of the future of plant biotechnology. Each chapter has been written by one or more leading practitioners in the field and then carefully edited to ensure thoroughness and consistency. The chapters are organized so that each one progressively builds upon the previous chapters. Questions set forth in each chapter help students deepen their understanding and facilitate classroom discussions. Inspirational autobiographical essays, written by pioneers and eminent scientists in the field today, are interspersed throughout the text. Authors explain how they became involved in the field and offer a personal perspective on their contributions and the future of the field. The text's accompanying CD-ROM offers full-color figures that can be used in classroom presentations with other teaching aids available online. This text is recommended for junior- and senior-level courses in plant biotechnology or plant genetics and for courses devoted to special topics at both the undergraduate and graduate levels. It is also an ideal reference for practitioners.

Download or read book Wheat Scab in Minnesota written by Jean MacInnes and published by . This book was released on 1923 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management of Fusarium Species and Their Mycotoxins in Cereal Food and Feed written by Thomas Miedaner and published by Frontiers Media SA. This book was released on 2017-11-10 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Health and safety of food and feed are the most important criteria for their quality. The quality of feed is in turn important for animal health, the environment and for the safety of food from animal origin. Fungi belonging to the Fusarium genus are widespread in crops causing plant diseases and producing toxic metabolites. Fusarium species can colonize plants during their growth on the field and cause serious damage in terms of yield and quality of harvested grains. One of the most important fungal diseases of wheat and other cereals in the world is Fusariumhead blight caused by the fungal pathogens Fusarium graminearum and Fusarium culmorumand others. In addition, these fungi produce mycotoxins, contaminating food and feed. The most important Fusarium mycotoxins include trichothecenes, zearalenone and fumonisins, primarily because of their prevalence, but also because of the toxic effect to humans and animals. However, these fungi produce also other mycotoxins such as moniliformin, beauvericin, enniantin or fusarins. Food and feed can be contaminated with mycotoxins at various stages in the production chain resulting in serious problems with health, safety and economic losses. It is estimated that 25% of the crop in the world each year are contaminated with these metabolites, the problem affects both industrialized countries and developing countries. The aim of this Research Topic of Frontiers in Microbiology is to publish state of the art research about occurrence and genomics of Fusarium species and their mycotoxins in the whole food and feed chain starting from the crops as well as implications for health and economic aspects. This research topic highlights the current knowledge on the plant diseases caused by Fusarium fungi as well as all aspects of Fusarium mycotoxin contamination of crops, food and feed, taking into account decontamination methods.

Download or read book Management of Fungal Plant Pathogens written by Arun Arya and published by CABI. This book was released on 2010 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of our current knowledge of some plant-pathogen interactions in economically important crops, emphasizing the importance of pathogenic fungi on fruits, cereals, postharvest crops and the establishment of plant diseases and drawing together fundamental new information on their management strategies based on conventional and eco-friendly methods, with an emphasis on the use of microorganisms and various biotechnological aspects of agriculture, which could lead to sustainability in modern agriculture. The book examines the role of microbes in growth promotion, as bioprotectors and bioremediators, and presents practical strategies for using microbes in sustainable agriculture. In addition, the use of botanicals vis-a-vis chemical pesticides is also reviewed. Contributions on new research fields such as mycorrhizas and endophytes are included. The book also examines in different chapters host-pathogen interactions in the light of the new tools and techniques of molecular biology and genetics.

Download or read book Plant Mutation Breeding and Biotechnology written by Q. Y. Shu and published by CABI. This book was released on 2012 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This book presents contemporary information on mutagenesis in plants and its applications in plant breeding and research. The topics are classified into sections focusing on the concepts, historical development and genetic basis of plant mutation breeding (chapters 1-6); mutagens and induced mutagenesis (chapters 7-13); mutation induction and mutant development (chapters 14-23); mutation breeding (chapters 24-34); or mutations in functional genomics (chapters 35-41). This book is an essential reference for those who are conducting research on mutagenesis as an approach to improving or modifying a trait, or achieving basic understanding of a pathway for a trait --.