中文摘要：

筛选耐镉亚麻品种并对其耐性进行综合评价,是利用亚麻进行重金属污染农田生物修复的基础。本研究用800μM的CdCl_2,溶液对来自36个国家的412份亚麻种质在种子萌发期进行镉胁迫试验,检测了各品种对照和处理的发芽势、发芽率、相对芽长等指标,并利用隶属函数的方法对这些亚麻种质的耐镉性进行了综合评价。结果表明：（1）镉胁迫对芽长的抑制作用最大,品种间的发芽势变异程度最大,发芽率变异程度最小;（2）大部分品种的平均隶属函数值位于0.6～0.8,0.8以上强耐镉品种和0.4以下的弱耐镉品种较少;（3）根据平均隶属函数值将412份品种分为5个耐性级别,1级（平均隶属函数值≥0.8）高耐镉性种质均来自中国和立陶宛。

英文摘要：

To screen and comprehensively evaluate the cadmium （Cd） tolerance of Linumusitatissimum varieties and provide technical support for bioremediation of Cd-contaminated farmland,412 flax germplasm from 36 countries were tested using 800p~M CdC12 solution. Germinating vigor （ GV）, germination percentage （GP） and seedling length （SL） of all varieties were investigated. Comprehensive evaluation of Cd^2＋ tolerance was also analyzed by subordinate function value method. The results showed that ： （ 1 ） Compare to GV and GP, Cd^2＋ had the most severe inhibition on SL. The greatest and smallest differences were observed in GV and GP for different varieties under Cd^2＋ treatment, respectively. （2） The subordinate function values of most varieties were between 0.6 and 0.8. Vari- eties with high cadmium tolerance of more than 0.9 and high susceptible varieties with the values less than 0.4 were rare. （3） With comprehensive evaluation value,412 flax varieties were categorized into five grades, high cad- mium tolerance varieties （Xi ≥0.8） were all from China and Lithuania.