关键词: 山西小麦, 高分子谷蛋白亚基, 品质育种

Abstract: The seed storage protein of 39 Shanxi wheat, including 26 released varieties and advanced lines, were separated by SDS-PAGE to determine the high-molecular-weight glutenin subunit composition. According to the quality scores method described by Payne, the Glu-1 quality scores of each genotype were evaluated. Theresults indicate that the Glu-1 quality scores of Shanxi wheat exhibit quite low. The majority of genotype possesse subunits N (null allele) and 1 coded by Glu-A1, subunits 7+8, 7+9 and 20 by Glu-B1, as well as subunits 2+12, 3+12 and 4+12 by Glu-D1. But rather few genotypes carry subunits for good quality, such as 2^* by Glu-A1 and 5+10 by Glu-D1. These compositions of Glu-1 can partialy explain the poor breadmaking quality of Shanxi wheat. Therefore, by using SDS PAGE methods, introduction and utilization of novel wheat genetic resource with good quality HMW-GS to wheat breeding can improve the quality of Shanxi wheat. In addition, 5 of Shanxi wheat lines with good glutenin subunits, which also show resistance to stripe rust of Sichuan, can be used as excellent wheat resources to Sichuan wheat breeding.

Key words: SHANXI WHEAT, HMW-GS, QUALITY IMPROVEMENT