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Wheat is the world's most important agricultural commodity. In Europe, where wheat is the main staple, bread wheat (Triticum aestivum) covers the majority of land on which wheat is cropped. Wheat breeders and technologists have contributed greatly to the continued success of bread wheat and its products. The `bread-making quality' of a wheat variety can be described in relation to the processing its kernels must undergo to make a good bread. Bread wheat kernels must be suitable for proper milling into a flour that can produce a dough capable of becoming fine bread. The type of bread varies depending on local bread-making practices. Part I of this book contains a study of the anatomy and chemical composition of wheat kernels, and of the fundamental difference between `soft' and `hard' kernelled varieties. It relates these characteristics to the processes of milling, dough-making and manufacturing of bread, and to biscuit and pasta making. The genetic basis for these characteristics is illustrated, and assay methods for characterizing wheat varieties - ranging from Saunders' chewing test to the most recent developments in glutenin and gliadin research - are evaluated. Part II briefly describes - country by country - how bread-making quality has been integrated into wheat-breeding programmes throughout Europe, and how breeders have attempted to resolve the conflict between yield and quality. It describes how quality wheats `travelled' around the world - from their endogenic source in Eastern Europe to North America, and back again to Europe. This explains how specific genetic material can appear in the pedigrees of varieties grown in a wide range of agro-ecological zones. In addition to giving an interesting historical survey, the book points the way forward for breeders' efforts in the future. Bread-Making Quality updates and interprets knowledge in a way that makes it particularly accessible for food technologists, breeders, students, and teachers.
Wheat Quality for Improving Processing and Human Health brings together an international group of leading wheat scientists to outline highly relevant and diverse aspects and the latest advances in understanding of the world’s most consumed cereal. Topics covered include LMW glutenins, starch-related proteins, and the impact of processing on composition and consumer health. Individual chapters focus on important factors such as FODMAPs, protein structure, dough viscoelasticity and fumonisins. The environmental effects on allergen content are comprehensively covered, as are phenolic compounds and molecular markers. The major quality screening tools and genetic resources are reviewed in depth. Gluten is a major focus of this work with chapters dedicated to health effects, analytical methods and standards, proteomics and mutant proteins. Starting in 2015, wheat quality scientists from across the globe have united to develop the Expert Working Group for Improving Wheat Quality for Processing and Health under the umbrella of the Wheat Initiative. This joint effort provides a framework to establish strategic research and organisation priorities for wheat research at the international level in both developed and developing countries. This Expert Working Group aims to maintain and improve wheat quality for processing and health under varying environmental conditions. The Group focuses on a broad range of wheat quality issues including seed proteins, carbohydrates, nutrition quality and micronutrient content, grain processing and food safety. Bioactive compounds are also considered, both those with negative effects such as allergens and mycotoxins, and those with positive effects such as antioxidants and fibre. The Group also works in the development of germplasm sets and other tools that promote wheat quality research. Wheat quality specialists working on the wheat value chain, and nutritionists will find this book a useful resource to increase and update their knowledge of wheat quality, nutrition and health issues.
This monograph provides a review of the knowledge that makes possible the intelligent tailoring of wheat proteins to provide for specific dough requirements. It emphasizes the combined roles of the gliadin and glutenin proteins in providing the balance that gives wheat gluten its unique rheological properties. The book gives a major update on the composition and functional properties of the gluten proteins, but it also includes introductory chapters to "set the scene" for young scientists and anyone new to this area of food science.
Wheat provides over 20% of the calories for the world population of 5. 3 billion persons. It is widely grown in five of the six continents. It is a highly versatile food product in that it can be stored safely for long periods of time and transported in bulk over long distances. In relative terms, it is reasonably priced; over the past quarter century, the inflation-adjusted price of wheat has been declining. Modern milling and baking technology required for the transformation of wheat grain into consumable baked products is available or accessible in all countries of the world. For these reasons, and because Canada is one of world's leading wheat producing countries, it seemed appropriate to include a major symposium on wheat in the scientific and technical program of the 8th World Congress of Food Science and Technology held in Toronto, Canada during September 29-0ctober 4, 1992. In selecting the topics for the symposium on wheat, we attempted to cover a full range of subjects including economics and marketing, nutrition, grading, processing, constituent chemistry and functionality, biote- nology, and safety of genetically modified wheat varieties. The major focus was on common hard (bread) wheats; separate papers were devoted to the unique characteristics and technological properties of common soft (biscuit) and durum (pasta) wheats. Each paper was presented by an acknowledged international expert. This book provides a more permanent record of the papers presented at the symposium.
The relationship between grain morphology and chemistry and the practical realities of milling, flour yield, dough properties and baking behaviour, are stressed and explained. The quality requirements of flours intended for bread-baking, noodle-making and for other industrial purposes are listed and discussed.
Cereal uses range from human food and beverages to animal feeds and industrial products. It is human food and beverages which are the predominant uses covered in this book, since the nutritional quality of cereals for animal feed is described in other publications on animal nutrition, and industrial products are a relatively minor use of cereals. Cereals are the main components of human diets and are crucial to human survival. Three species, wheat, rice and maize, account for the bulk of human food. Barley is the major raw material for beer production and ranks fourth in world production. Other species such as sorghum are regionally important. This book covers all the major cereal species: wheat, rice, maize, barley, sorghum, millet, oats, rye and triticale. Specific chapters have been devoted to a description of the major end-uses of each of the species and to definition of the qualities required for each of their end uses. The functional and nutritional quality of cereals determines their suitability for specific purposes and may limit the quality of the end product, influencing greatly the commercial value of grain. An under standing of the factors that determine grain quality is thus important in the maintenance of efficient and sustainable agricultural and food production. The biochemical constituents of the grain that determine quality have been described in chapters on proteins, carbohydrates and other components. An understanding of the relationships between grain composition and quality is important in selecting grain for specific uses.