干旱胁迫对小麦染色体代换系旗叶相对含水量和离体失水速率的影响

以中国春-Synthetic 6x小麦染色体代换系及其亲本为材料,对其旗叶相对含水量(RWC)、离体叶片失水速率(RWL)进行测定。结果表明,在干旱胁迫下,1A,2D和3D代换系叶片的相对含水量及其干旱/对照值显著或极显著高于中国春,3A,3B,4B,5B,6B,1D,2D和4D代换系叶片离体失水速率及其干旱/对照值显著或极显著低于中国春。由此表明,Synthetic 6x的1A,2D和3D染色体上可能存在干旱胁迫下调控相对含水量的基因,Synthetic 6x的3A,3B,4B,5B,6B,1D,2D和4D染色体上可能存在干旱胁迫下调控离体失水速率的基因。

Effect of Drought Stress on Relative Water Content and RWL of Flag Leaves in Wheat Chromosome Substitution Lines

The leaf relative water content(RWC)and rate of water loss of excised-leaf(RWL)of Chinese Spring(CS)-Synthetic 6x substitutions lines and parents cultivars Chinese Spring(recipient)and Synthetic 6x(donor)under the drought condition and control treatment were measured.The results indicated that the RWC and drought/control of ratio 1A,2D and 3D chromosome substitution lines were significantly higher than Chinese Spring at 0.05 or 0.01 level,while the 3A,3B,4B,5B,6B,1D,2D and 4D chromosome substitution lines were significantly lower than Chinese Spring at 0.05 or 0.01 level.It is concluded that the genes of controlling RWC were probably located on 1A,2D and 3D chromosomes and that of controlling RWL were probably located on 3A,3B,4B,5B,6B,1D,2D and 4D chromosomes of Synthetic 6x.