【摘要】 以三年的冬小麦区域试验参试品系为材料，测定分析了离休叶片失水速率（ＲＷＬ），叶片蒸腾速率（ＴＲ）和叶片初始含水量（ＩＷＣ），结果表明，ＲＷＬ，ＴＲ和ＩＷＣ都存在显著的基因型差异。品系间排序在不同次测定中有波动，但呈基本稳定的趋势。不同试验区同一天ＲＷＬ的测定结果综合可比性较好；年度间ＲＷＬ测定结果稳定，ＲＷＬ和ＩＷＣ趋向正态分布。ＲＷＬ和ＴＲ无相关关系，ＲＷＬ和ＩＷＣ有微弱的正相关趋势，三个性状与产量都不相关。根据此结果在选择高产性状的同时选择较低的ＲＷＬ和ＴＲ方面进行了探讨。更多还原

【Abstract】 Rate of water loss (RWL)of excised-leaves transpiration rate (TR) of leaves and initial water content (IWC) were studied in lines of yield regional tests in three years. The results showed that there were significant genotypical differences for all the three traits. There were relatively consistent tendencies in ranks for the above traits in spite of some fluctuations. RWL data from different yield regional tests measured on the same day could be satisfactorily analyzed as a whole. RWL results were consistent among years. RWL and IWC tended to follow normal distributions. There was no correlation between RWL and TR,and a weak Positive correlation was observed for RWL and IWC. The three traits were not correlated with grain yield. Based on these results,selection of high yield as well as low RWL and low TR for drought tolerance was discussed.更多还原