The grain protein of 757 wheat samples in and out of China was fractionated by SDS-PAGE to determine their HMW glutenin subunit composition. 65 HMW glutenin subunit compositions (53 common ones and 12 rare ones)were found. For the number of the subunit compositions,foreign varieties were more than Chinese ones,and Chinese improved varieties were more than local ones. Authors also found some rare subunits which were 2. 2+12,2+10,2 and 12 coded by Glu-D1 and three subunits which have not been detected. The co...