The compositions of high molecular weight glutenin subunits(HMW-GS) of 150 wheat germplasms were analyzed using SDS-PAGE.The quality score at Glu-1 of each germplasm was calculated according to the quality rating system described by Payne et al.The results showed that the genetic variation at Glu-1 locus of introduced wheat germplasms was abundant,in which 15 subunit patterns and 31 subunit combinations were detected.The mean quality score of these germplasms was 6.83,ranging from 4 to 10.Among these 150 wh...