摘要： 研究了扬麦158、硬簇麦以及小麦-簇毛麦异染色体系DA1V、DS2V、DA3V、DAV、DSV、DA5V、DS6V、DA6V、DA7V等11个材料的苗期耐盐性和扬花期的光合生理特性,为进一步挖掘簇毛麦优质资源,服务小麦育种提供理论依据.11个材料在四叶期分别用浓度为100,150,200,250 mmol/L的NaCl溶液处理,进行了相对电导率的测试.在扬花期进行了气孔导度、胞间CO2浓度和净光合速率的测定.结果表明:高浓度盐胁迫(250 mmol/L NaCl)下,簇毛麦2V、3V和7V染色体能有效缓解盐胁迫对小麦的危害;簇毛麦3V染色体对不同浓度盐胁迫均表现耐盐性,3V染色体上可能携有耐盐基因;簇毛麦2V、5V、7V染色体上可能携有高光效基因,DS2V、DA5V和DA7V可作为培育高光效小麦的育种材料.

关键词: 簇毛麦, 小麦, 电导率, 气孔导度, 光合速率

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

中图分类号: 

• S512.01