| In order to explore the succession characteristics of wheat ear temperature and its relationship with yield,an experiment was conducted with the main cultivars in Guanzhong plain in the past 80 years. The ear temperature was investigated on 0 days after anthesis (DAA0),DAA7,DAA14,DAA21,DAA28 and maturity stage. The ear number,grain number per ear,thousand-grain weight,grain weight per ear and yield were also examined. It was found that the ear temperature at anthesis showed a gradual increasing trend in the past 80 years,while the ear temperature after anthesis showed a decreasing trend by degrees. In the past 80 years,the ear number,grain number per ear,thousands grain weight,grain weight per ear and grain yield have an increasing trend. There was a positive correlation between ear temperature at flowering stage and yield,and yield components,but a negative relation was found between ear temperature after anthesis and the indicators. This study indicates that ear temperature can be used as a reference index for high yield cultivars breeding. |
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