小麦叶片水分利用效率生理性状遗传相关分析

为了明确小麦叶片水分利用效率与相关生理性状的遗传相关关系，为小麦水分利用效率遗传育种提供信息，本实验选用了4个抗旱和高产小麦品种，组成4×4完全双列杂交试验。通过对亲本和杂交后代的表型相关和遗传相关分析结果表明，在小麦灌浆早、中、晚期，叶片水分利用效率（WUE）和光合速率(Pn)与呈显著或极显著正相关；与胞间CO2浓度（Ci）和蒸腾速率（Tr）成负相关，且达到极显著水平；与叶温（Tl）呈负相关，且在灌浆后期达到极显著负相关；与气孔导度（Cond）呈现二次曲线的趋势。说明叶片WUE和相关性状间在灌浆期间有很好的遗传相关关系，可以在小麦WUE生理遗传育种中进行应用。

Genetic Correlation Analysis Between Leaf Water Use Efficiency and Relevant Physiological Traits in Wheat

In order to understand the correlation between water use efficiency （WUE）and related physiological traits, and offer some information for genetics and breeding of wheat WUE, the 4×4 complete dialed cross was set up with 4 drought resistant and high-yield wheat varieties. The results of the phenotype and heredity correlation analysis among parents and offsprings show as follows, during filling prophase and metaphase as well anaphase,there was a significant positive correlation or very significant positive correlation between the leaf WUE and the photosynthetic rate(Pn); very significant negative correlation between leaf WUE and interstellar CO2 concentration(Ci) and transpiration rate(Tr); the relation between leaf WUE and leaf temperature(Tl) was the negative correlation, and that reached the very significant negative correlation during filling anaphase; the relation between leaf WUE and stomatal conductance(Cond) show quadratic curve tendency. There are stable correlation between leaf WUE and other related traits druing filling satge, these results could be used in physiology and genetic improving of WUE in wheat.