冬小麦抗旱性鉴定指标的研究

研究了小麦抗旱性鉴定的部分产量指标、形态指标和生理指标。通过对４个产量指标分析，确认抗旱指数优于抗旱系数，干旱敏感指数和产量因素降低指数，抗旱指数既能反映品种的抗旱性能，又能体现品种在旱地条件下的产量水平，可作为小麦杂种稳定世代鉴定抗旱性的可靠指标。

A Study on the Indices Determining Drought resistance in Winter Wheat

In this paper,some of yield indices,morphological and physiological characteristics in determining drought resistance of winter wheat were studied.The results showed that drought resistance index was superior to drought resistance coefficient,drought susceptibility index and reducing indices of yield components in determining drought resistance of winter wheat.Index of drought resistance,which represented both the drought resistance and productivity of a cultivar,could be used as a reliable index of drought resistance for stable generation of hybrids.Such indices as length of coleoptile and LAI at elongation stage,which were predicted simple,easy,fast and accurate,could be used to determine the drought resistance of a bulk of genetic resources and segregated individual plant of hybrid progenies.Correlation coefficient was found not significant between drought resistance and leaf proline concentration at grain filling stage,which was not considered to be a suitable index in determining drought resistance of winter wheat.