Identification of Cereal Varieties by Gel Electrophoresis of the Grain Proteins
نویسنده
چکیده
The many factors that determine the price and suitability for processing of cereal grain can be divided into two groups: seasonal factors and inherited factors. Seasonal factors are largely determined by growing, harvesting, and storage conditions. These aspects of quality are readily tested and include moisture content, test weight, soundness of the grain, and the presence of contaminants. On the other hand, many other aspects of quality are bred into the seed long before the grower receives it. These factors include milling yield, flour color, and the strength, stickiness, and extensibility of the dough in wheat, and malting quality in barley. The comprehensive testing of these characteristics upon receipt at the grain elevator would be impossible. Fortunately, such testing is not necessary, because these factors are largely defined by varietal specification. Some rapid tests, such as the Bolling test for nonbread wheats (Jonas, 1978), have been devised for on-the-spot identification of grain with undesirable quality. However, most wheat producing countries have adopted a system of assuring the quality characteristics of the grain they receive by restricting deliveries to certain suitable varieties. Because the prices paid for grain often vary, an ability to identify the variety of
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