Relationship between Composition of High-Molecular-Weight Subunits and Protein Contents and Sedimentation Values in 150 Wheat Varieties Relationships between High Molecular Weight Glutenin Subunits (HMW-GS) and Quality Traits in Wheat (Triticum aestivum L.) Early Generation Selection of Gluten Strength in Common Wheat Effects of Sulphur on Wet Gluten, SDS-Sedimentation Value and Amino Acid in Spring Wheat Cultivars with Different Quality