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根据4年的研究结果,分析了在冬小麦基因型产量和株高变异较大时,离体叶片失水速率(RWL)与产量构成和植株性状的关系.研究表明,RWL基因型间存在显著差异.在多数情况下,RWL与产量和千粒重呈负相关,与株高呈正相关.研究还发现基因型位次随失水时间的变化,有低失水,先快后慢,先慢后快和高失水4种类型.RWL与产量的负相关随失水时间延长而减弱.基因型差异以失水2~3H最为明显,且更具有较大生理意义,因此提出以离体2~3H为测定RWL的适宜时间.否定了国外多年延用6~9HRWL作为指标的结论.“,”The relationship between excised leaf water loss rate(RWL)and yield components/plant traits was analyzed by using winter wheat genotypes varying remarkably in yield and plant height in 4 year experiments. It was demonstrated that significant difference in RWL existed among genotypes.Under most circumstances,RWL was correlated negatively with yield and grain weight,and positively with plant height. The results laid a principal basis for simultaneous selection for high yield and low RWL. It was found that g...