| The variation characteristics of winter wheat quality among different types and different areas can be a hint to guide the study on high quality planting and zoning of different wheat varieties. Based on the quality data of winter wheat in five main wheat producing provinces from 2006 to 2015, we used correlation analysis to explore the spatial distribution characteristics of 10 quality traits and the relationship between wheat quality and longitude and latitude. The results showed that the sedimentation value, wet gluten content, stability time, maximum tensile resistance, stretch area and extensibility of strong gluten and medium-strong gluten wheat were higher in Henan, Hebei or Shandong, while those of medium gluten and weak gluten wheat were higher in Anhui or Jiangsu. Most quality indicators of the four types of gluten wheat were significantly correlated with longitude and latitude(P<0.05), with test weight and protein content significantly positively correlated with latitude(P<0.05) and significantly negatively correlated with longitude(P<0.01). With increasing latitude, the wet gluten content, extensibility and score of strong gluten and medium-strong gluten wheat increased significantly, while the sedimentation value, maximum tensile resistance and stretch area of medium gluten and weak gluten wheat decreased significantly. With the increase of longitude, the wet gluten content, water absorption, stability time, maximum tensile resistance, stretch area, extensibility and score of strong gluten wheat were significantly decreased, while the sedimentation value, maximum tensile resistance and stretch area of medium-strong gluten, medium gluten and weak gluten wheat were significantly increased. Therefore, it is suitable to plant strong gluten and medium-strong gluten wheat in Hebei, Henan and Shandong, and medium gluten or weak gluten wheat in Anhui and Jiangsu. |
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