Multifunctional grains for the future: genetic engineering for enhanced and novel cereal quality
2009
Godwin, I. D. | Williams, S. B. | Pandit, P. S. | Laidlaw, H. K. C.
Cereals provide more than half the world population's calorific intake, and have a variety of other important uses as food and beverage ingredients, livestock feeds, and as sources of renewable energy and industrial components. The technology to genetically modify many important cereals is now well-established, thereby presenting new opportunities to produce cereals with enhanced quality and novel properties. In 2007, GM (genetically modified) maize with insect and herbicide resistance was grown on over 30 million hectares worldwide, yet to date, there are no GM cereals with enhanced or novel grain (end-use) qualities being grown in commercial farmers' fields. This review will discuss some of the latest GM technology developments reported to enhance the quality of cereals for food and other uses. Developments and opportunities involving gene manipulation for starch and protein quality, as well as non-starch polysaccharides, phenolic compounds and micronutrients will also be discussed. The current paucity of GM cereals with enhanced grain quality is not related to the absence of technological progress, rather it is the regulatory and consumer acceptance issues that have slowed the release of these crops.
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