Quality properties of wheat (Triticum aestivum L.) are strongly affected by low molecular weight glutenin subunits (LMW GS). It is very important for improvement of wheat qualities to study the LMW GS compositions and distribution in Shaanxi wheat cultivars and advanced lines. STS markers were used to detect the allelic variations of LMW GS at Glu A3and Glu B3in 175 wheat cultivars and advanced lines from Shaanxi Province. Four allelic variations of LMW GS were detected at Glu A3locus in Shaanxi wheats, i.e. Glu A3a, Glu A3b, Glu A3cand Glu A3d, accounting for 12.6%, 1.7%, 58.3% and 27.4%, respectively. And eight allelic variations were found at Glu B3locus, i.e. Glu B3a, Glu B3b, Glu B3d, Glu B3e, Glu B3f, Glu B3g, Glu B3iand Glu B3j, accounting for 4.6%, 2.9%, 45.7%, 0.6%, 2.9%, 8.5%, 4.0% and 30.8%, respectively. There were different types and combinations of LMW GS allelic variations in three diverse regions of Shaanxi Province, which was likely related to the regional eating habits, wheat breeding programs and parental materials selected in wheat breeding. |