Comparison Analysis of Quality Characters between Wheat Cultivars Bred and Wheat Landraces in Gansu

In order to learn the situation and difference of quality between the wheat cultivars bred and wheat landraces in Gansu,we detected and analyzed the main quality characters of 326 wheat cultivars bred and 257 landraces from Gansu.The results showed that there exited differences in five quality characters of the content of grain crude protein,sedimentation value,wet gluten content,hardness and lysine content between the wheat cultivars bred and wheat landraces.Compared with wheat landraces,in general,the content of grain crude protein,sedimentation value,wet gluten content,hardness and lysine content of the wheat cultivar bred decreased 14.0%、13.2%、19.1%、10.8% and 8.0% respectively,while that of the winter wheat cultivar bred decreased 12.9%、10.6%、17.6%、5.5% and 5.8% and that of the spring wheat cultivar bred decreased 11.1%、7.8%、16.7%15.3% and 10.6%,respectively.That of the winter wheat cultivar bred is higher than the spring wheat cultivar bred about 18.1%、12.0%、12.9%、18.7% and 16.7%,respectively.Among all the 257 wheat landraces,117 with quality indexes exceeded the criterion of strong gluten wheat were found,and 110 of the 326 wheat cultivars bred with quality exceeded the criterion of weak gluten wheat were found.