Abstract: In order to develop the good genetic resources of Haynaldia villosa and provide the theory basis for wheat breeding,salt-tolerance of the seedlings and photosynthetic characteristics at the stage of flowering were studied,Using Yangmai 158,Triticum durum-Haynaldia villosa amphidiploid and wheat -Haynaldia villosa heterochromosome lines such as DA1V,DS2V,DA3V,DA4V,DS4V,DA5V,DS6V,DA6V,DA7V as materials. At the stage of four-leaves,the relative conductivity of 11 materials were tested under NaCl solution stress with concentrations of 100,150, 200,and 250 mmol /L,respectively. The stomatal conductance,intercellular CO2 concentration and net photosynthetic rate of the 11 materials were determined at the stage of flowering. The results showed that under the salt stress of high concentrations(250 mmol /L NaCl) ,Haynaldia villosa 2V,3V and 7V chromosomes could effectively mitigate the hazards of salt stress on wheat. Chromosome 3V showed salt-tolerance under different NaCl concentrations,indicating chromosome 3V could carry one gene of salt-tolerance. Haynaldia villosa chromosome 2V,5V and 7V could carry a gene of high photosynthetic efficiency. Therefore,DS2V,DA5V and DA7V would be used as high photosynthetic efficiency materials for wheat breeding.

Key words: Haynaldia villosa, Wheat, Conductivity, Stomatal conductance, Photosynthetic rate

CLC Number: 

• S512.01