Explain what is meant by biofortification?
12th bio......
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Answer:
Biofortification can be defined as a process to increase the bioavailability and the concentration of nutrients in crops through both conventional plant breeding (White and Broadley, 2005) and recombinant DNA technology (genetic engineering) (Zimmermann and Hurrell, 2002).
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Biofortification
BiofortificationBiofortification as a Strategy to Address Global Micronutrient DeficienciesBiofortification was principally developed as a food-based strategy to address widespread deficiencies of vitamin A, iron, and zinc that remain prevalent to the greatest extent in low-income countries. Strategies most widely implemented for the prevention of micronutrient deficiencies are the distribution of micronutrient supplements in pharmacological preparations, and food fortification, with far less investment thus far in dietary diversification strategies. In this context, there are several potential advantages and limitations to biofortification as a micronutrient intervention. Biofortification is targeted primarily to the rural poor who rely heavily on locally produced staple foods as their primary source of nutrition, and who often have restricted financial or market access to commercially processed fortified foods. The biofortification strategy has potential for sustainability as, once planting material is obtained, it can often be saved, recycled, and further disseminated to other farmers. Once initial development and dissemination are completed, recurring costs of maintaining production of biofortified crops are estimated to be low. However, the additional amount of micronutrient achievable through biofortification will be modest compared to amounts supplied in supplements, and in some cases fortified food. Hence, the potential magnitude of impact of biofortification on population nutrient status may be commensurately modest. The time required to develop a viable crop with a stable, minimum level of additional nutrient content can extend up to 6–8 years or more. As such, there is less flexibility to adjust the content and combination of nutrients according to specific needs. Given the widespread prevalence of micronutrient deficiencies, and a variety of scenarios in which any one strategy will be effective, biofortification is considered as complementary to other micronutrient deficiency prevention strategies.