Analysis on Quality Characters of Wheat Landraces in Sichuan Province
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S512.1 S831.8[机标]

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    Abstract:

    Nineteen quality parameters of 67 wheat landraces in Sichuan province were investigated and analyzed. The result indicated that protein content and lysine content of all the varieties were commonly low, while wet gluten content, sedimentation value and gluten index were higher. Farinogram-development time, stability time and valorimeter value were generally low, and dough theological properties were not very perfect. Among all the 67 wheat landraces, one protein content exceeded 14 %, ten wet gluten content exceeded 40 %, sedimentation value of 29 exceeded 40ml, and 7 and 5 varieties were of middle and weak gluten, respectively. Five landraces, including Deyang tianli.ichang xiaomai, Nanbu bangchuimai, Youyang guangtou, Anyue hongxiaomai and Pengxi honghua guangtoumai could be considered to be perfect general quality characters. The correlation analysis indicated that the simple correlations between protein content, dry or wet gluten content, sedimentation value, development time, stability time and valorimeter value were significant or great significant. Partial correlations between protein content and wet gluten content and between sedimentation value and stability time were also significant. Protein content was simply negatively correlated to total starch content at a level of 0. 01, while partial correlation between them was not significant. Both simple correlations and partial ones between total starch content and amylopectin content were negatively significant at a level of 0. 01. Simple correlation between total starch content and amylose content was not significant, while partial correlation between them was great significant. Amylose content was negatively related to amylopectin content at a level of 0. 01 based on both simple correlations and partial ones. Therefore, it was reasonable to choose protein content, sedimentation value and amylose content as primary evaluation indexes in early generations of wheat breeding.

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History
  • Received:May 23,2005
  • Revised:July 04,2005
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