Download or read book Identifying Novel Disease Resistance and Drought Tolerance Genes in a Synthetic NAM Population written by Nikayla Strauss and published by . This book was released on 2021 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat was domesticated approximately 10,000 years ago when the tetraploid grass Triticum turgidum (AABB) is thought to have hybridized with the diploid grass Aegilops tauschii Coss. (DD), resulting in hexaploid wheat Triticum aestivum (AABBDD). Most research confirms the D-genome was the last genome to be introduced, is the least diverse, and tends to have fewer known markers. This distinct lack of diversity has hindered breeders and geneticists; diversity could lead to higher yields, better end-use quality, and increased tolerance to biotic and abiotic stress. Synthetic wheat is a tool that can be used to incorporate genetic diversity and provide disease resistance genes not found in common germplasm. Synthetic wheat is made by recreating the hybridization that led to T. aestivum using different subspecies of both T. durum and Ae. tauschii. The result is a primary synthetic hexaploid wheat (AABBDD) that has diverse alleles and trait combinations, and can be readily crossed into adapted germplasm. In addition to being a source of novel disease resistance genes, synthetic wheat lines are also known to have more diverse root systems. The objective of this dissertation was to evaluate a synthetic nested association mapping population, the D-genome Nested Association Mapping Population (DNAM) for novel abiotic and biotic stress tolerance genes. Multiple projects involved screening selections of the DNAM population for resistance to stripe rust (Puccinia striiformis), Fusarium crown rot (Fusarium culmorum and Fusarium pseudograminearum), and cereal cyst nematode (Heterodera avenae and Heterodera filipjevi). One novel gene was found to confer resistance to both H. filipjevi and avenae cereal cyst nematodes. Moderate resistance to fusarium crown rot was also detected, but is contributed both from the recurrent parent of the population as well as by several A. tauschii donor parents. A subset of the DNAM was also used for a three-year, nine environment drought study. A genome-wide association study (GWAS) revealed three quantitative trait loci (QTL) for grain protein concentration and quality across all nine environments, and nine QTL contributing to those same traits within individual environments.
Download or read book Genetically Engineered Crops written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-01-28 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetically engineered (GE) crops were first introduced commercially in the 1990s. After two decades of production, some groups and individuals remain critical of the technology based on their concerns about possible adverse effects on human health, the environment, and ethical considerations. At the same time, others are concerned that the technology is not reaching its potential to improve human health and the environment because of stringent regulations and reduced public funding to develop products offering more benefits to society. While the debate about these and other questions related to the genetic engineering techniques of the first 20 years goes on, emerging genetic-engineering technologies are adding new complexities to the conversation. Genetically Engineered Crops builds on previous related Academies reports published between 1987 and 2010 by undertaking a retrospective examination of the purported positive and adverse effects of GE crops and to anticipate what emerging genetic-engineering technologies hold for the future. This report indicates where there are uncertainties about the economic, agronomic, health, safety, or other impacts of GE crops and food, and makes recommendations to fill gaps in safety assessments, increase regulatory clarity, and improve innovations in and access to GE technology.
Download or read book Laboratory protocols CIMMYT Applied molecular genetics laboratory written by and published by CIMMYT. This book was released on 1994 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Agrobiodiversity Conservation written by Nigel Maxted and published by CABI. This book was released on 2012 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the 2010 conference "Towards the establishment of genetic reserves for crop wild relatives and landraces in Europe", this book is the cutting edge discussion of agrobiodiversity conservation. By considering the benefits of understanding and preserving crop wild relatives and landraces, it encompasses issues as wide-ranging and topical as habitat protection, ecosystem health and food security. Focusing on Europe, but globally relevant, Agrobiodiversity Conservation is ideal for postgraduate students of conservation and environmental studies, conservation professionals, policy makers and researchers.
Download or read book Drought Resistance in Crops with Emphasis on Rice written by International Rice Research Institute and published by Int. Rice Res. Inst.. This book was released on 1982 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Enhancement of Crops for Tolerance to Abiotic Stress Mechanisms and Approaches Vol I written by Vijay Rani Rajpal and published by Springer. This book was released on 2019-04-24 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abiotic stresses such as drought (water deficit), extreme temperatures (cold, frost and heat), salinity (sodicity) and mineral (metal and metalloid) toxicity limit productivity of crop plants worldwide and are big threats to global food security. With worsening climate change scenarios, these stresses will further increase in intensity and frequency. Improving tolerance to abiotic stresses, therefore, has become a major objective in crop breeding programs. A lot of research has been conducted on the regulatory mechanisms, signaling pathways governing these abiotic stresses, and cross talk among them in various model and non-model species. Also, various ‘omics’ platforms have been utilized to unravel the candidate genes underpinning various abiotic stresses, which have increased our understanding of the tolerance mechanisms at structural, physiological, transcriptional and molecular level. Further, a wealth of information has been generated on the role of chromatin assembly and its remodeling under stress and on the epigenetic dynamics via histones modifications. The book consolidates outlooks, perspectives and updates on the research conducted by scientists in the abovementioned areas. The information covered in this book will therefore interest workers in all areas of plant sciences. The results presented on multiple crops will be useful to scientists in building strategies to counter these stresses in plants. In addition, students who are beginners in the areas of abiotic stress tolerance will find this book handy to clear their concepts and to get an update on the research conducted in various crops at one place
Download or read book Broadening the Genetic Base of Grain Cereals written by Mohar Singh and published by Springer. This book was released on 2016-09-13 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers comprehensive coverage of important grain cereals including their origin and distribution, crop gene pool, level of diversity, production constraints, traits of importance for genetic base widening, crop improvement methodologies, genome mapping, genomics for breeding, and future strategies. The chapters, contributed by eminent crop researchers from around the world, provide rare insights into the crop-specific constraints and prospects drawing from their substantial experience. As such, the book offers an essential source of information for grain cereals scientists, teachers, students, policy planners and developmental experts alike. Grain cereals, which comprise rice, wheat, maize, barley, oats, sorghum and millets, are members of the grass family. These crops are vital to human nutrition, thanks to their roles as staple food crops in different parts of the globe. Some of them are rich sources of carbohydrates, which provide energy, while others are important sources of minerals, vitamins and proteins, in addition to their medicinal properties. In most cereals, the existing variability among elite germplasm has been exploited to attain a desirable level of productivity. However, to make further breakthroughs in enhancing yield and improving stability in future crop cultivars, new sources of genes/alleles need to be identified in wild/weedy species and incorporated into the cultivated varieties. Though there have been many publications on various aspects of grain cereal improvement in the recent past, to date this essential information has remained scattered among different periodicals.
Download or read book Tomato Yellow Leaf Curl Virus Disease written by Henryk Czosnek and published by Springer Science & Business Media. This book was released on 2007-09-23 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ideally suited to horticulturalists and plant virologists, this highly useful text offers a multidisciplinary view on one of the major diseases of tomato crops, the tomato yellow leaf curl disease. It deals with epidemiological aspects of the disease as well as integrated pest management in the field. Coverage discusses the efforts aimed at breeding tomato plants resistant to the virus by classical breeding, by marker-assisted breeding and by genetic engineering.
Download or read book The World Wheat Book written by Alain P. Bonjean and published by Intercept Limited. This book was released on 2001-01 with total page 1131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is a comprehensive history of wheat across all its main areas of production. New techniques such as in vitro culture now enable the development of a greater level of understanding of the genetics of wheat.
Download or read book Wheat Landraces written by Nusret Zencirci and published by Springer Nature. This book was released on 2021-09-15 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landraces possess a very large genetic base in population structure and are dynamic populations of cultivated plants with historical origin, distinct identity, and without any formal crop improvement. They are often genetically diverse, locally adapted, and associated with traditional farming systems. Resistance genes to biotic and abiotic stress factors, which are especially diversified in landraces, are of great interest to plant breeders, faced with global climate challenge. In addition, gene pools made of different landraces grown in different ecological conditions can be used for wheat breeding to enhance quality; yield and other desirable agricultural parameters. An estimated 75% of the genetic diversity of crop plants was lost in the last century due to the replacement of high yielding modern varieties. There is, thus, an urgent need to preserve existing species, not only for posterity but also as a means to secure food supply for a rising world population. In this book, we provide an overview of wheat landraces with special attention to genetic diversities, conservation, and utilization.
Download or read book Responses of Plants to Environmental Stresses written by Jacob Levitt and published by . This book was released on 1972 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing Global Genetic Resources written by National Research Council and published by National Academies Press. This book was released on 1993-02-01 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This anchor volume to the series Managing Global Genetic Resources examines the structure that underlies efforts to preserve genetic material, including the worldwide network of genetic collections; the role of biotechnology; and a host of issues that surround management and use. Among the topics explored are in situ versus ex situ conservation, management of very large collections of genetic material, problems of quarantine, the controversy over ownership or copyright of genetic material, and more.
Download or read book Phloem written by Gary A. Thompson and published by John Wiley & Sons. This book was released on 2012-08-13 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phloem: Molecular Cell Biology, Systemic Communication, Biotic Interactions is a timely collection of research on the cellular and molecular biology of this plant vascular tissue. Recent advances in phloem research have revealed the centrality of this plant tissue to whole plant development and physiology. Building on advances made through developments of new analytical technologies, this book will provide readers with a current and comprehensive reference on the role of phloem in plant growth and development. Collecting the work of a global team of leading researchers, Phloem will provide the reader with a valuable synthesis of the latest research in a single volume.
Download or read book Genetic Evaluation for Insect Resistance in Rice written by E. A. Heinrichs and published by Int. Rice Res. Inst.. This book was released on 1985 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Resistance to Viruses written by David Evered and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concern about the environmental consequences of the widespread use of pesticides has increased, and evidence of pesticide-resistant virus vectors have continued to emerge. This volume presents a timely survey of the mechanisms of plant resistance and examines current developments in breeding for resistance, with particular emphasis on advances in genetic engineering which allow for the incorporation of viral genetic material into plants. Discusses the mechanisms of innate resistance in strains of tobacco, tomato, and cowpea; various aspects of induced resistance, including the characterization and roles of the pathogenesis-related proteins; antiviral substances and their comparison with interferon; and cross-protection between plant virus strains. Also presents several papers which evaluate the status of genetic engineering as it relates to breeding resistant plants. Among these are discussions of the potential use of plant viruses as gene vectors, gene coding for viral coat protein, satellite RNA, and antisense RNA, and practical issues such as the durability of resistant crop plants in the field.
Download or read book Manual on MUTATION BREEDING THIRD EDITION written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-10-09 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides guidelines for new high-throughput screening methods – both phenotypic and genotypic – to enable the detection of rare mutant traits, and reviews techniques for increasing the efficiency of crop mutation breeding.
