Genomic Approaches For Mapping And Predicting Disease Resistance In Wheat Triticum Aestivum L

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Genomic Approaches for Mapping and Predicting Disease Resistance in Wheat (Triticum Aestivum L.)

Author : Cristiano Lemes Da Silva
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Genomic Approaches for Mapping and Predicting Disease Resistance in Wheat (Triticum Aestivum L.) by : Cristiano Lemes Da Silva

Download or read book Genomic Approaches for Mapping and Predicting Disease Resistance in Wheat (Triticum Aestivum L.) written by Cristiano Lemes Da Silva and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat diseases cause significant economic losses every year. To ensure global food security, newly released cultivars must possess increased levels of broadly-effective resistance against wheat pathogens, acceptable end-use quality, and high yield potential. Genetic host resistance stands out from other management strategies as the most viable option for controlling diseases. New genotyping platforms allow whole genome marker discovery at a relatively low cost, favoring the identification of novel loci underlying traits of interest. The work presented here describes genomic approaches for mapping and predicting the resistance to Fusarium head blight (FHB) and wheat rusts. The first study used biparental mapping to identify quantitative trait loci (QTL) associated with Fusarium head blight (FHB) resistance. A doubled haploid population (DH) was originated from a cross of Everest and WB-Cedar, which are widely grown wheat cultivars in Kansas with moderately resistant and moderately susceptible reactions to FHB, respectively. We confirmed that neither of the parents carry known large-effect QTLs, suggesting that FHB resistance is native. Eight small-effect QTLs were identified as associated with multiple mechanisms of FHB resistance. All QTLs had additive effects, providing significant improvements in levels of resistance when they were found in combinations within DH lines. In the second study, a genome-wide association mapping (GWAS) and genomic selection (GS) models were applied for FHB resistance in a panel of 962 elite lines from the K-State Wheat Breeding Program. Significant single nucleotide polymorphisms (SNPs) associated with the percentage of symptomatic spikelets were identified but not reproducible across breeding panels tested in each year. Accuracy of predictions ranged from 0.25 to 0.51 depending on GS model, indicating that it can be a useful tool to increase levels of FHB resistance. GWAS and GS approaches were also applied to a historical dataset to identify loci underlying resistance to leaf and stem rust at seedling stage in a panel of elite winter wheat lines. Infection types of multiple races of wheat rusts from the last sixteen years of the Southern Regional Performance Nursery (SRPN) were used in this study. A total of 533 elite lines originating from several breeding programs were tested in the SRPN during this period of time. GWAS identified significant SNP-trait associations for wheat rusts, confirming the effectiveness of already known genes and revealing potentially novel loci associated with resistance.

Genomic Prediction and Genome Wide Association Mapping for Disease Resistance in Wheat

Author : Philomin Juliana
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Genomic Prediction and Genome Wide Association Mapping for Disease Resistance in Wheat by : Philomin Juliana

Download or read book Genomic Prediction and Genome Wide Association Mapping for Disease Resistance in Wheat written by Philomin Juliana and published by . This book was released on 2017 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat (Triticum aestivum L.) is one of the major food crops in the world that is grown on more land area than any other commercial crop. The demand for wheat is expected to increase by 60% by 2050 which cannot be met with the current yield gain of 1%. Hence, it is important to evaluate different strategies for increasing the genetic gain in wheat. With this focus, we evaluated two strategies, genomic prediction and genome-wide association studies (GWAS) for disease resistance in CIMMYT’s international bread wheat screening nurseries (IBWSN). Our objective was to compare different prediction models for resistance to leaf rust (LR), stem rust (SR), stripe rust (STR), Septoria tritici blotch (STB), Stagonospora nodorum blotch (SNB) and tan spot (TS) in the 45th and 46th IBWSN entries. The prediction models tested include: Least-squares (LS), genomic-BLUP (G-BLUP), Bayesian ridge regression (BRR), Bayes A (BA), Bayes B (BB), Bayes C (BC), Bayesian least absolute shrinkage and selection operator (BL), reproducing kernel Hilbert spaces (RKHS) markers (RKHS-M), RKHS pedigree (RKHS-P) and RKHS markers and pedigree (RKHS-MP). The 333 lines in the 45th IBWSN and the 313 lines in the 46th IBWSN were genotyped using genotyping-by-sequencing markers. For the rusts, the mean prediction accuracies were 0.74 for LR seedling, 0.56 for LR APR, 0.65 for SR APR, 0.78 for YR seedling and 0.71 for YR APR. For the leaf spotting diseases, the mean genomic prediction accuracies were 0.45 for STB APR, 0.55 for SNB seedling, 0.66 for TS seedling and 0.48 for TS APR. Using genome-wide marker based models resulted in an average of 42-48% increase in accuracy over LS. Overall, the RKHS-MP model gave the highest accuracies, while LS gave the lowest. GWAS was also performed on these traits and several significant markers and candidate genes were identified. We conclude that implementing GWAS and genomic selection in breeding for these diseases would help to achieve higher accuracies and rapid gains from selection. ...

Testing New Genetic and Genomic Approaches for Trait Mapping and Prediction in Wheat (Triticum Aestivum) and Rice (Oryza Spp).

Author : Olufunmilayo Olubukola Ladejobi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Testing New Genetic and Genomic Approaches for Trait Mapping and Prediction in Wheat (Triticum Aestivum) and Rice (Oryza Spp). by : Olufunmilayo Olubukola Ladejobi

Download or read book Testing New Genetic and Genomic Approaches for Trait Mapping and Prediction in Wheat (Triticum Aestivum) and Rice (Oryza Spp). written by Olufunmilayo Olubukola Ladejobi and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Whole Genome Approaches for Characterizing and Utilizing Synthetic Wheat

Author : Sandra Margarita Dunckel
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (934 download)

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Book Synopsis Whole Genome Approaches for Characterizing and Utilizing Synthetic Wheat by : Sandra Margarita Dunckel

Download or read book Whole Genome Approaches for Characterizing and Utilizing Synthetic Wheat written by Sandra Margarita Dunckel and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The global population is estimated to reach 9.1 billion by 2050. Together with climate change, insuring food security for this population presents a significant challenge to agriculture. In this context, a large number of breeding objectives must be targeted. The focus of the work presented here is to explore genomic approaches for tapping exotic germplasm for valuable alleles to increased yield, disease resistance and abiotic stress tolerance. The loss of genetic diversity in bread wheat (Triticum aestivum L.) due to bottlenecks during polyploidization, domestication and modern plant breeding can be compensated by introgressing novel exotic germplasm. Here, the potential of genomic selection (GS) for rapid introgression of synthetic derived wheat is evaluated in field trials. Overall, the GS models had moderate predictive ability. However, prediction accuracies were lower than expected likely due to complex and confounding physiological effects. As such, implementation of rapid cycle GS for introgression of exotic alleles is possible but might not perform very well with synthetic derived wheat. Disease resistance is another important trait affecting grain yield. Stem rust (Puccinia graminis f. sp. tritici) has historically caused severe yield loss of wheat worldwide. In a quantitative trait loci (QTL) mapping study with a synthetic-derived mapping population, QTLs for resistance to stem rust races TRTTF and QTHJC were identified on chromosomes 1AS, 2BS, 6AS and 6AL. Some of these genes could be new resistance genes and useful for marker-assisted selection (MAS). In addition to food insecurity through lack of sufficient source of calories, nutrient deficiency is considered the 'hidden hunger' and can lead to serious disorders in humans. Through biofortification, essential nutrients are increased in staple crops for improved quality of food and human health. A high-throughput elemental profiling experiment was performed with the same synthetic derived mapping population to study the wheat ionome. Twenty-seven QTL for different elements in wheat shoots and two QTL in roots were identified. Four "hotspots" for nutrient accumulation in the shoots were located on chromosomes 5AL, 5BL, 6DL and 7AL. Overall, exotic germplasm is a valuable source of favorable alleles, but improved breeding methodologies are needed to rapidly utilize this diversity.

Enhancing Efficiency in Wheat (Triticum Aestivum L.) Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches

Download Enhancing Efficiency in Wheat (Triticum Aestivum L.) Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches PDF Online Free

Author : Megan Johanna Lewien
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis Enhancing Efficiency in Wheat (Triticum Aestivum L.) Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches by : Megan Johanna Lewien

Download or read book Enhancing Efficiency in Wheat (Triticum Aestivum L.) Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches written by Megan Johanna Lewien and published by . This book was released on 2017 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: By 2050 global demand for wheat (Triticum aestivum L.) is predicted to grow by 60%. To meet this demand, annual genetic gains must increase by 1.4%, and withstand increasing environmental stresses. The goal of the work herein was to use new phenomic, genomic and molecular tools to identify novel genomic regions associated with eyespot (Oculimacula yallundae and O. acuformis) disease resistance, drought tolerance and yield stability. To identify novel genomic regions associated with eyespot resistance in winter wheat, disease susceptibility was evaluated in two PNW winter wheat panels (n= 469, 399) and genome-wide association mapping was conducted. Of the 92 marker trait associations identified, the seven most significant cumulatively reduced eyespot disease response. As breeding lines were used, the results can be used for rapid introgression of resistance alleles into elite lines. The second objective of this work was to evaluate phenotypic associations of physiological traits and yield under rain-fed conditions to identify traits for use in breeding. 700 lines of the spring wheat nested association mapping panel were evaluated for water use efficiency, plant water status, photosynthetic and photoprotective mechanisms and grain yield over three years. Six traits had a cumulative effect on increasing yield: plant water status, plant height, photosynthetic capacity, vegetative green index, water used efficiency and days from sowing to heading. The physiological traits identified can be used to improve selection efficiency and yield stability under variable rain-fed conditions. The third objective of this work was to identify genomic regions associated with the water-use efficiency, plant water status, leaf health and photosynthesis. 650 lines of the spring wheat NAM panel were evaluated for these traits and grain yield under rain-fed conditions and joint inclusive composite interval mapping and genome-wide association analysis was conducted. The seven most significant grain yield QTL identified, located on chromosomes 1A, 1B, 2B, 4B, 5B, and 7B, were found in multiple environments and were associated with multiple physiological traits. This study helps reveal the genetic architecture of drought tolerance and grain yield and can be used to improve the efficiency of breeding under variable water-limited conditions.

Wheat Landraces

Author : Nusret Zencirci
Publisher : Springer Nature
ISBN 13 : 3030773884
Total Pages : 268 pages
Book Rating : 4.0/5 (37 download)

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Book Synopsis Wheat Landraces by : Nusret Zencirci

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.

Genome-wide Association Mapping and Genomic Prediction for Enhancing FHB Resistance in Hard Winter Wheat

Author : Jinfeng Zhang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Genome-wide Association Mapping and Genomic Prediction for Enhancing FHB Resistance in Hard Winter Wheat by : Jinfeng Zhang

Download or read book Genome-wide Association Mapping and Genomic Prediction for Enhancing FHB Resistance in Hard Winter Wheat written by Jinfeng Zhang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stripe Rust

Author : Xianming Chen
Publisher : Springer
ISBN 13 : 9402411119
Total Pages : 723 pages
Book Rating : 4.4/5 (24 download)

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Book Synopsis Stripe Rust by : Xianming Chen

Download or read book Stripe Rust written by Xianming Chen and published by Springer. This book was released on 2017-07-11 with total page 723 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively introduces stripe rust disease, its development and its integral control. Covering the biology, genetics, genome, and functional genomics of the pathogen, it also discusses host and non-host resistance, their interactions and the epidemiology of the disease. It is intended for scientists, postgraduates and undergraduate studying stripe rust, plant pathology, crop breeding, crop protection and agricultural science, but is also a valuable reference book for consultants and administrators in agricultural businesses and education.

Genomic Selection and Quantitative Trait Loci Mapping for Fusarium Head Blight Resistance in Wheat (Triticum Aestivum L.).

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (931 download)

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Book Synopsis Genomic Selection and Quantitative Trait Loci Mapping for Fusarium Head Blight Resistance in Wheat (Triticum Aestivum L.). by :

Download or read book Genomic Selection and Quantitative Trait Loci Mapping for Fusarium Head Blight Resistance in Wheat (Triticum Aestivum L.). written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Genomics-Assisted Crop Improvement

Author : R.K. Varshney
Publisher : Springer Science & Business Media
ISBN 13 : 1402062958
Total Pages : 405 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Genomics-Assisted Crop Improvement by : R.K. Varshney

Download or read book Genomics-Assisted Crop Improvement written by R.K. Varshney and published by Springer Science & Business Media. This book was released on 2007-12-12 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: This superb volume provides a critical assessment of genomics tools and approaches for crop breeding. Volume 1 presents the status and availability of genomic resources and platforms, and also devises strategies and approaches for effectively exploiting genomics research. Volume 2 goes into detail on a number of case studies of several important crop and plant species that summarize both the achievements and limitations of genomics research for crop improvement.

Wheat Blast

Author : Sudheer Kumar
Publisher : CRC Press
ISBN 13 : 0429894074
Total Pages : 157 pages
Book Rating : 4.4/5 (298 download)

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Book Synopsis Wheat Blast by : Sudheer Kumar

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.

Into the Unknown

Author : Lance Farley Merrick
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.8/5 (454 download)

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Book Synopsis Into the Unknown by : Lance Farley Merrick

Download or read book Into the Unknown written by Lance Farley Merrick and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winter wheat (Triticum aestivum L.) is the most widely grown cereal grain in Washington state. However, it generally takes 12 years to develop a cultivar from crossing to release, which can limit the ability for rapid improvement of traits. Genomic selection (GS) is posed to increase genetic gains by reducing the generation interval, also known as cycle time, while increasing response to selection. To fully utilize GS in breeding programs we reviewed and proposed implementing a two-part breeding strategy by differentiating population improvement and product development to increase the genetic gain of a breeding program. We then compared GS models for various scenarios for two complex traits, seedling emergence and stripe rust (Puccinia striiformis Westend. f. sp. tritici Erikss.) resistance, using two training populations composed of a diverse association mapping panel and breeding lines that can be used as a guideline for the implementation of GS into breeding programs. We compared GS models for seedling emergence and showed the consistent moderate accuracy of the parametric models indicates little advantage of using non-parametric models within individual years, but the non-parametric models show a slight increase in accuracy when combing years for complex traits. We then compared single-trait and multi-trait genome-wide association (GWAS) models with covariates, and were able to identify many small effect markers, while identifying the large effect markers on chromosome 5A. Stripe rust resistance is controlled by both major and minor resistance genes, and it is recommended to combine both major and minor genes for durable resistance. We compared the accuracy of GS models with major gene and GWAS markers as fixed effects and compared them to marker-assisted selection. The major gene and GWAS markers had only a small to zero increase in prediction accuracy over the base GS models but showed a statistical increase in accuracy using major markers when the mean accuracy decreased. Further, stripe rust resistance phenotypes are commonly skewed due to high levels of resistance. We compared classification and regression models and showed that breeders can use linear and non-parametric regression models within their own breeding lines over combined years to accurately predict skewed phenotypes.

Genetic Mapping of Disease Resistance Genes Fhb1, Fhb2 and Lr34 in Spring Wheat (Triticum Aestivum L.)

Author : Patricia Anne Cuthbert
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (855 download)

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Book Synopsis Genetic Mapping of Disease Resistance Genes Fhb1, Fhb2 and Lr34 in Spring Wheat (Triticum Aestivum L.) by : Patricia Anne Cuthbert

Download or read book Genetic Mapping of Disease Resistance Genes Fhb1, Fhb2 and Lr34 in Spring Wheat (Triticum Aestivum L.) written by Patricia Anne Cuthbert and published by . This book was released on 2008 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Genomic Selection Strategies to Predict Grain Yield and Disease Resistance Traits in a Wheat Breeding Program

Author : Virginia Laura Verges
Publisher :
ISBN 13 :
Total Pages : 237 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Genomic Selection Strategies to Predict Grain Yield and Disease Resistance Traits in a Wheat Breeding Program by : Virginia Laura Verges

Download or read book Genomic Selection Strategies to Predict Grain Yield and Disease Resistance Traits in a Wheat Breeding Program written by Virginia Laura Verges and published by . This book was released on 2021 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Genome-wide Association Mapping and Genomic Prediction for Resistance to Rusts (Puccinia Spp.) in Wheat Germplasm Collections

Author : Kebede Tadesse Muleta
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (969 download)

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Book Synopsis Genome-wide Association Mapping and Genomic Prediction for Resistance to Rusts (Puccinia Spp.) in Wheat Germplasm Collections by : Kebede Tadesse Muleta

Download or read book Genome-wide Association Mapping and Genomic Prediction for Resistance to Rusts (Puccinia Spp.) in Wheat Germplasm Collections written by Kebede Tadesse Muleta and published by . This book was released on 2016 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genomic selection has the potential to enhance the utilization of germplasm collections through prediction of genomic estimated breeding values (GEBV) for as many traits as have been measured. We assessed the effect of different population genetic properties and marker density scenarios on GEBV accuracy in the context of applying GS for wheat germplasm utilization. The results of the cross-validation tests demonstrated that prediction accuracy increased with increase in population size and marker density. The results of the current GS suggests that larger germplasm collections may be more efficiently sampled based on lower-density genotyping methods, while genetic relationships between the training and validation populations remain critical when exploiting GS to select from germplasm collections.

Advances in Breeding for Wheat Disease Resistance

Author : Peter Bulli
Publisher : Frontiers Media SA
ISBN 13 : 283250373X
Total Pages : 259 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Advances in Breeding for Wheat Disease Resistance by : Peter Bulli

Download or read book Advances in Breeding for Wheat Disease Resistance written by Peter Bulli and published by Frontiers Media SA. This book was released on 2022-11-03 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Encyclopedia of Food Grains

Author : Colin W Wrigley
Publisher : Academic Press
ISBN 13 : 0123947863
Total Pages : 1956 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Encyclopedia of Food Grains by : Colin W Wrigley

Download or read book Encyclopedia of Food Grains written by Colin W Wrigley and published by Academic Press. This book was released on 2015-12-17 with total page 1956 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Food Grains, Four Volume Set is an in-depth and authoritative reference covering all areas of grain science. Coverage includes everything from the genetics of grains to the commercial, economic and social aspects of this important food source. Also covered are the biology and chemistry of grains, the applied aspects of grain production and the processing of grains into various food and beverage products. With the paramount role of cereals as a global food source, this Encyclopedia is sure to become the standard reference work in the field of science. Also available online via ScienceDirect – featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. Written from an international perspective the Encyclopedia concentrates on the food uses of grains, but details are also provided about the wider roles of grains Well organized and accessible, it is the ideal resource for students, researchers and professionals seeking an authoritative overview on any particular aspect of grain science This second edition has four print volumes which provides over 200 articles on food grains Includes extensive cross-referencing and "Further Reading" lists at the end of each article for deeper exploration into the topic This edition also includes useful items for students and teachers alike, with Topic Highlights, Learning objectives, Exercises for Revision and exercises to explore the topic further