Sel’skokhozyaistvennaya Biologiya [Agricultural Biology], 2013, № 1, p. 15-25 UDK 633.11:631.524 A COMPARISON OF GRAIN QUALITY IN SPRING AND WINTER WHEATS ASSOCIATED WITH MARKET CLASSES (review) O.V. Krupnova Research and Development Institute of Agriculture of the South-East, RAAS, Saratov 410010, Russia e-mail: raiser@mail.saratov.ru Received October 17, 2011 S u m m a r y In Russia, as one of the biggest grain manufacturer and exporter, the wheat is cultivated from west regions to the Far East, and the differences between market classes of wheat grain are of a special interest. <...> The analysis of accessible publications has shown discrepancy of the conclusions about distinctions between these classes on test weight of a grain, grain protein and gluten content and composition, a gliadin/glutenin ratio, a falling number, dough rheology, parameters of alveogramms, farinogramms, mixogramms, and also on baking properties. <...> As a result of weather conjuncture, the spring wheat cultivars succeed in some regions, but the winter wheat cultivars — in other ones. <...> Keywords: spring wheat, winter wheat, grain protein content, gliadin, glutenin, dough rheology, baking properties. <...> Wheat is one of major components of daily human diet. <...> It is rich in protein containing all essential amino acids, as well as starch and many other valuable nutrients important for complete healthy nutrition, and it is suitable for long-term storage (1). <...> Wheat is the most common cereal crop in the World. <...> Winter wheat is the main cereal crop grown in southern and western regions of the European Russia, while in Siberia and the Altai this role belongs to spring wheat, and they both are cultivated in the Volga region. <...> Soft wheat (Triticum aestivum L.) is the most economically important species, while durum wheat (T. durum Desf) is grown on less than 10% acreage in many countries including Russia. <...> For example, in the United States there are following market classes of wheat : I – durum (T. durum Desf), II - HRS (hard red spring), III – HRW (hard red winter), IV – SRW (soft red winter), V – HW (hard white), VI – SW (soft white) (www.plainsgrains.org). <...> A similar classification <...>