The genes associated with HMW-GS,1B/1R translocation and waxy protein in common wheat affect its processing quality of bread,noodle and steamed bread. In order to understand quality status of Gansu wheat cultivars (lines), Dx 5, By8, By9,Bx7OE, 1B/1R and Wx genes were identified using gene-specific molecular markers. The results showed that the distribution frequencies of genes detected were different in various ecological regions of Gansu,and the frequency of Dx 5, By8,Bx7OE, Wx-B 1b decreased from western to southeastern areas,but those of By9, 1B/1R translocation increased. Frequency of Dx 5(46.4%), By8(26.1%),Bx7OE(1.4%) and Wx-B 1b(14.4%) in spring wheat was higher than that of Dx 5(26.3%), By8(25.0%),Bx7OE(0) and Wx-B 1b (7.5%) in winter wheat,whereas frequency of By9(34.8%) and 1B/1R(27.5%) in spring wheat was lower than that of By9(41.3%) and 1B/1R(38.8%) in winter wheat. Distribution frequency of genes associated with gluten strength and waxy protein indicated the quality of wheat cultivars,which decreased from west to south-east,was not good in Gansu province,and quality of spring wheat was better than that of winter wheat; most of them are served to process common noodle and steamed bread. |