Study On Wheat Varieties Milling Quality Of Shaanxi Guanzhong

Compared with the wheat varieties of Shaan 229, Xiaoyan 6, Gaoyou 503 andXiaoyan 107, grain physical qualities and milling qualities of the wheat varieties and linesthat were coming from Shaanxi province medium fertile region test of 1999～2000 and2000～2001 were analyzed. According to the results, the condition of milling qualities ofwinter wheat in Shaanxi Guanzhong region was showed, the varieties and lines which hadgood milling qualities were selected, the difference between years was researched, and theway to improve the qualities was suggested. 1. The average thousand-kernel weight of samples was higher than 40g. The averagetest weight was higher than 780g/L. The hardness of most of samples was above 50%. 2. The CV(coefficient of variation) between varieties of 1B flour extraction and onceflour extraction was above 10%, and of final milling yields and milling quality number wasclose to 10%. The average final flour yields of wheat varieties of 1999～2000 and 2000～2001 were 58.75% and 59.37%. 3. The wheat varieties of Junlü4 , 97(39) and Xiaoyan 107 that had the big orpearling kernel had high milling yields and good milling qualities. 4. The difference between years of grain physical qualities was significant, and ofmilling quality index was small. 5. According to the correlation analysis between wheat grain physical qualities andmilling qualities, the thousand –kernel weight and thickness of grain that was related to themilling qualities had the ability to forecast the milling yields. The 1B flour extraction, theonce flour extraction, the ash content and final flour yields were positively related to themilling qualities significantly. 6. The thousand-kernel weight and the ratio of the length to the thickness of wheatkernel were the key properties to improve the wheat milling qualities.