玉米自交系芽苗期耐盐性的鉴定与筛选

Salinity Tolerance Identification and Screening of Maize Inbreeds in Seedling Emergence Stage

以14个玉米自交系为材料,用不同浓度NaCl溶液模拟盐胁迫环境对其芽苗期耐盐性进行了鉴定。结果表明:玉米对盐胁迫非常敏感,不同盐浓度均对玉米芽苗期的发芽率、胚根长度、叶片相对含水量及净光合速率产生抑制作用;不同材料间耐盐性存在明显差异,各指标均能反映出不同材料的耐盐性;通过鉴定筛选,14个材料中,耐盐性极强的为XS98-28,耐盐性较强的为XSK5,耐盐性中等的为XSF,XS01-61,其余材料耐盐性均较弱。

Maize inbreeds of 14 varieties were treated with NaCl solutions of different concentration and their salinity tolerance during seedling emergence stage were analyzed. The results were as the follows： maize inbreeds were sensitive to salt stress ; different salinity stress had inhibition effects on the germination rate, shoot length, relative water content and net photosynthetic rate;different inbreed had obvious difference in salinity tolerance;the best one was XS98-28;the next was XSK5 ;the middle were in turn XSF, XS01-61 ;the lower were other inbreeds.