Altered Harvest. Agriculture, Genetics, and the Fate of the World's Food Supply. Jack Doyle

9 - World Distribution in Relation to Economic Losses

omega-Atracotoxin-Hv1a is an insect-specific neurotoxin whose phylogenetic specificity derives from its ability to antagonize insect, but not vertebrate, voltage-gated calcium channels. In order to help understand its mechanism of action and to enhance its utility as a lead compound for insecticide development, we used a combination of protein engineering and site-directed mutagenesis to probe the toxin for key functional regions. First, we constructed a Hairpinless mutant in which the C-terminal beta-hairpin, which is highly conserved in this family of neurotoxins, was excised without affecting the fold of the residual disulfide-rich core of the toxin. The Hairpinless mutant was devoid of insecticidal activity, indicating the functional importance of the hairpin. We subsequently developed a highly efficient system for production of recombinant toxin and then probed the hairpin for key functional residues using alanine-scanning mutagenesis followed by a second round of mutagenesis based on initial "hits" from the alanine scan. This revealed that two spatially proximal residues, Asn(27) and Arg(35), form a contiguous molecular surface that is essential for toxin activity. We propose that this surface of the beta-hairpin is a key site for interaction of the toxin with insect calcium channels.

Food security depends on available world supplies of food, the income of the designated population, and the population's access to the available supplies. Consequently, though seldom recognized in national food security policies, there is a direct relationship between food security, world trade in food, and the domestic policies that govern access to international markets for food. On all three scores, I believe we can be optimistic about improvements in world food security over the next quarter century. Over the next quarter century, the world's supply of food will grow somewhat more rapidly than will the demand for it, leading to lower real prices of food. Thus, the trend of food prices, as measured by grain prices, is likely to continue the trend of the current century, though at a slower rate of decline.' The remarkable reduction in the international price of grain that has occurred in this century is given all too little emphasis in discussions of the world food situation, certainly so in the discussions of the food pessimists. I am confident that the real per capita incomes of the majority of the population in the developing countries will continue to increase, contributing to an improvement in food security. Finally, I believe that, with the changes in agricultural policies in the major industrial countries, world trade in farm products, especially grains, will be further liberalized in the future. In addition, more and more developing countries are reducing barriers to trade, thus increasing access to world food supplies. Thus, all the broad trends point o an improvement in world food security and a reduction in the number of persons adversely affected by both long-term or short-term inadequate access to food. This does not mean that in every country food security will improve. Some governments may continue to follow national and trade policies related to food that restrict domestic food production, limit the growth of per capita incomes, and restrict access to the available world food supplies. When this happens, food security and adequacy will not be im roved or not improved as much as they po entially could be. At this time, there can be little doubt that the poor performance of agriculture and the insecurity of food supplies in sub-Saharan Africa over the past quarter century have been due primarily to inappropriate policies-to policies that discriminated against agriculture and resulted in large-scale governmental interventions in international trade. Misgovernment plus civil and ethnic wars have exacted and continue to exact a

The Recombinant DNA (rDNA) technique is expected to bring about a great progress in the improvement of breeding technology and the development of new plant varieties showing high quality and high yield, such as those with excellent pest and disease resistances, those with environmental stress tolerance, etc. In the USA, a late ripening tomato variety (FLAVR SAVRTM) developed through the rDNA technology was commercialized as the world's first recombinant food in 1994. Seven transgenic crop plants, such as herbicide tolerant soybean and canola, insect resistant corn and potato, were complied the all safety assessments with the guidelines required and they are marketable in Japan.General public, however, are not familiar with rDNA technology, and some seem to feel uncomfortable with biotechnology. It is caused by the difficulty of the technology and lacking of sufficient information. In order to promote agricultural biotechnology, it is important to give precise information about rDNA technology to general public so that they can comfortably accept biotechnology and the products. Because, the rDNA technique is an most important technology to improve world's food supply and global environment in the next century.

World Populationprovides the resources needed to understand the economic, demographic, and environmental issues at stake on a planet rushing toward "carrying capacity." World Population: A Reference Handbookpresents the latest facts regarding population problems and issues in countries all over the world. An overview of world population highlighting terms, demographic processes, and background information leads to a tour of world population history through census counts, plagues, famines, breakthroughs in disease control and birth control, and landmark judicial decisions. Biographies profile people who have worked to advance our understanding of world population issues or shaped population policy, such as M. S. Swaminathan, architect of India's "Green Revolution," who contributed to the expansion of the world's food supplies. A statistical chapter provides data on everything from the birth rate in Pakistan to AIDS orphans in the Caribbean, and a fascinating discussion of global trends for 2015 makes projections about world demographics, aging patterns, migration, and food.

Refrigeration and the world's food supply — especially in developing countries

Engineering the Farm offers a wide-ranging examination of the social and ethical issues surrounding the production and consumption of genetically modified organisms (GMOs), with leading thinkers and activists taking a broad theoretical approach to the subject. Topics covered include: - the historical roots of the anti-biotechnology movement - ethical Issues involved in introducing genetically altered crops - questions of patenting and labeling - the precautionary principle and its role in the regulation of GMOs - effects of genetic modification on the world's food supply - ecological concerns and impacts on traditional varieties of domesticated crops - potential health effects of GMOs Contributors argue that the scope, scale, and size of the present venture in crop modification is so vast and intensive that a throughgoing review of agricultural biotechnology must consider its global, moral, cultural, and ecological impacts as well as its effects on individual consumers. Throughout, they argue that more research is needed on genetically modified food and that consumers are entitled to specific information about how food products have been developed. Despite its increasing role in worldwide food production, little has been written about the broader social and ethical implications of GMOs. Engineering the Farm offers a unique approach to the subject for academics, activists, and policymakers involved with questions of environmental policy, ethics, agriculture, environmental health, and related fields.

A third of all food produced globally by weight is lost or wasted between farm and fork – that's more than 1 billion tonnes. Converted into calories, this equates to 24% of the world's food supplies. Food loss refers to loss at or near the farm and in the supply chain. For the present study, it is important to know the losses of agricultural products that occur between the level at which production is recorded and the household, i.e., storage and transportation. The prevalence of overweight and obesity is emerging as a problem in Bulgarian society as well. Revealing the relationship between food loss from agricultural products and the prevalence of obesity is the aim of the study. The data source is the Food and Agriculture Organization (FAO). Data from Food Balances and from Food Security and Nutrition were used. The data refer to the period 2000–2021. For per capita supply, all four FAO indicators were used: Food supply quantity (kg/capita/year), Food supply (kcal/capita/day), Protein supply quantity (g/capita/day), Fat supply quantity (g/capita/day), separately for vegetal and animal products. One indicator was used as a measure of population nutrition: Prevalence of obesity in the adult population (18 years and older). For the last indicator, there is data only for the period 2000–2016, so our analysis is limited to this period. The main hypothesis is that food losses affect the per capita supply, which in turn affects the nutrition of the population and the prevalence of obesity. A simultaneous equations model (SEM) was used to model these relationships and process data. After evaluation of the SEM model, the following results were obtained: Losses of vegetal products directly influence the prevalence of obesity in the adult population (18 years and older). The relationship is negative – greater losses of vegetal products lead to a lower prevalence of obesity in the adult population (18 years and older), which coincides with preliminary expectations. Losses of animal products indirectly influence the prevalence of obesity in the adult population (18 years and older). The relationship is mediated by food supply (kcal/capita/day). The relationship between losses of animal products and the mediator variable is positive; greater losses lead to greater per capita supply. This contradicts preliminary expectations that greater losses will lead to a smaller per capita supply. The relationship between per capita supply and the prevalence of obesity in the adult population (18 years and older) is positive; larger per capita supply leads to a higher prevalence of obesity in the adult population, which coincides with preliminary expectations. Some of the mediator variables have an independent influence on the dependent variables.

As the World Food and Nutrition Study (WFNS) points out, the United States must increase its support of certain high priority research areas now if the people of the world are to be free from hunger in the year 2000. With adequate support and selection of priorities, it is almost a certainty that the people can be fed. In the areas of crop and animal production, insect control, and aquatic food sources alone, the study teams appointed by the National Academy of Sciences have identified seven high priority areas, which if pursued vigorously could easily double or triple the world's food supply within the next twenty-five years. These areas are integrated pest management, nitrogen fixation by soil microorganisms, increasing photosynthetic rates, genetic manipulation, breeding resistance of plants to such stresses as drought and acidic soils, increasing livestock carrying capacity of grazing lands, controlling diseases such as sleeping sickness or East Coast Fever in livestock, and reducing the waste in fish processing. They offer major new pathways for the increase in food supplies. If research proved successful in the areas listed above, and if research findings were translated into farming practices in the developing countries, the food supply could essentially be doubled again by the year 2000 as it was in the developing countries between 1950 and 1975. This earlier doubling, the only gain of its magnitude in history, resulted primarily from increased use of fertilizers and pesticides and from traditional plant breeding. It may be instructive as an example to describe in more detail the research proposed for one of these major areas, that of plant stress. Until now most efforts to overcome the effects

Plant diseases create one of the most serious risks to the world's food supply, reducing agricultural production and endangering millions of people's lives. These illnesses can destroy crops, disrupt food supply networks, and increase the danger of food deficiency, emphasizing the importance of establishing strong methods to protect the world's food sources. The approaches of deep learning have transformed the field of plant disease diagnosis, providing sophisticated and perfect solutions for early detection and management. However, a prevalent concern with deep learning models is their susceptibility to a lack of generalization and robustness when faced with novel crop and disease categories that were not included in the training dataset. To tackle this problem, this study present a novel deep learning-based model that can differentiate between healthy and diseased leaves in various crops, even if the model was not trained on them. The main idea is to identify the diseased small leaf regions instead of the diseased leaf's overall appearance and to calculate the disease's prevalence rate on the entire leaf. To achieve efficient classification and to take advantage of the Inception model's superiority in disease recognition, this study use a small Inception model architecture, which can process small regions without sacrificing performance. This study trained and evaluated the proposed approach using the highly regarded PlantVillage dataset, which is the most used dataset because of its extensive and varied coverage, in order to verify its efficacy. The accuracy percentage of the proposed approach was 99.75%. This novel method tackles the crucial problem of model generalization to a variety of crops and diseases in addition to improving the precision of plant disease diagnosis. Furthermore, it demonstrated its potential for wide applicability and support to global food security programs by outperforming the current methodologies in its capacity to identify any illness across any crop type.

A serious constraint to agricultural productivity and a constant pressure to global food security and hunger are infections of plants with viruses. Of particular concern is the impact of viruses and their vectors on cereals, wheat, maize (corn in the USA), rice, barley, sorghum, oats, millet and rye, which provide much of the world's food and drink. Because viral populations evolve quickly, the emergence of new variants of classic viruses with stronger virulence, the occurrence of viruses switching host from the wild species to the cultivated crops, or recombinants between different families, pose a serious challenge in the control of viruses and to the durability of widely deployed resistance against viruses. As there are essentially no chemical options to prevent viral infections, genetic resistance remains the most sustainable strategy for combating these major agricultural pests.Key ConceptsCereals are the most important component of the world's food supply.Intensification of crop production and introduction of vectors play key roles in the widespread of viruses in cereals.Most viruses of cereals are transmitted by hoppers, fungi like or aphids. Beetles and mites are responsible for the transmission of newly emerging viruses of cereals.With no chemical options to prevent viral infections, genetic resistance remains the most sustainable strategy.Recent threats in global food security are due to newly emerging viral diseases.

World agricultural development strategy and the environment

The world's food supply is becoming increasingly vulnerable because of rising political and climatic crises. To identify food supply vulnerabilities at an early stage, this paper proposes a multifactorial and standardized import vulnerability index (IVI). The IVI encompasses (i) an exporter vulnerability index (EVI) consisting of four exporter-specific factors and (ii) a product vulnerability index (PVI) consisting of three product-specific factors. We applied a robust principal component analysis to derive weights to combine these individual factors into a standardized IVI. The IVI was applied to food import-dependent Switzerland from 2014 to 2019 as an empirical case study. The results showed that a large share of Swiss food imports mainly originated from neighboring countries, indicating a very low to moderate EVI. Regarding the PVI, only product groups that were imported from a small number of countries (e.g., oilseeds) or that showed a low self-sufficiency ratio (e.g., coffee) or high price volatility (e.g., meat) exhibited a high value. Moreover, the findings demonstrate that the IVI showed neither large fluctuations nor a decreasing or increasing trend. With regular updates, the proposed indicator can become a valuable monitoring tool for food supply security.

Aflatoxin B1: A review on metabolism, toxicity, occurrence in food, occupational exposure, and detoxification methods

The food and nutrient intake among Paleolithic Homo sapiens, hunter-gatherers and among Asian and Homo economicus Western populations shows marked variations. Economic development and affluence may be associated with a decrease in the consumption of omega-3 fatty acids, vitamins, antioxidants and amino acids and significant increase in the intakes of carbohydrates, (mainly refined), fat (saturated, trans fat and linoleic acid) and salt compared to the Paleo- lithic period. The protein or amino acid intake was 2.5 fold greater (33 vs. 13%) in the Paleolithic diet Homo sapiens compared to modern Western diet consumed by Homo economicus populations. Approximately 10,000 years ago, prior to the Agricultural Revolution, our diet was based on an enormous variety of wild plants. However, today about 17% of plant species provide 90% of the world's food supply which is mainly contributed by grains produced by fertilizer based on rapidly grown crops which may result in a decrease in nutrient density and increase in energy. Wheat, corn and rice ac- count for three fourths of the world's grain production on which humans are dependent for their food supply. Grains are high in omega-6 fatty acids and carbohydrates and low in omega-3 fatty acids and antioxidants compared to leafy green vegetables. It has been estimated that diet of Homo sapiens was characterized by higher intakes by essential and non- essential amino acids, calcium, potassium, magnesium, flavonoids and w-3 fatty acids whereas modern Western diet of Homo economicus has excess of energy-rich refined carbohydrates, w-6, trans fat and saturated fat and low in protective nutrients. The consumption of such diets in wealthy countries in conjunction with sedentary behavior is associated with increased prevalence of morbidity and mortality due to noncommunicable diseases (NCDs).