偃麦草属植物种质材料苗期耐盐性综合评价  

A comprehensive evaluation of salt tolerance for germplasm and materials of Elytrigia at the seedling stage

作　　者：孟林[1] 尚春艳[1,2] 毛培春[1] 张国芳[1] 安沙舟[2] 

机构地区：[1]北京市农林科学院北京草业与环境研究发展中心,北京100097 [2]新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室,新疆乌鲁木齐830052

出　　处：《草业学报》2009年第4期67-74,共8页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(30571321);"十一五"国家重点科技支撑项目(2008BADB3B05);北京市农林科学院常规育种财政专项;农业部牧草种质资源保护项目资助

摘　　要：采用温室苗期模拟NaCl盐分胁迫方法,对来自于21个国家的偃麦草属8个植物种34份种质材料苗期的叶片相对含水量、相对电导率、脯氨酸、K+/Na+、相对生长速度变化率、耐盐系数、存活率和出现盐害到死亡的时间等指标进行测定与分析,并对偃麦草属植物种质材料苗期的耐盐性进行综合评价。结果表明,上述指标均是偃麦草属植物种质材料苗期耐盐性评价的有效指标。且通过对0.9%NaCl浓度下的各项指标进行综合聚类,可将34份偃麦草属植物种质划分为3个耐盐级别,即耐盐种质有ER030、ER035、ER041、EE011、EE014、EE017、EE023、EE026、EE047、EH001、EH002和EPU02;中度耐盐种质有ER008、ER014、ER027、ER032、ER037、ER038、ER044、ER045、EE007、EE027、EJ001、EPO02、EPO03和EPO04;敏盐种质有ER028、ER033、ER036、ER039、EE022、EJ003、EL001和EI022。Simulating salinity stress in a green house was used to study the relative water content（RWC）, relative electrical conductivity rate（EC）,content of free proline（Pro）, K^＋/Na^＋ , changes of relative growth rate,the salt-tolerant coefficient, the livability and time of salinity injury to death of Elytrigia. Materials of 34 germplasms and 8 species of Elytrigia collected from 21 countries were measured and analyzed at the seedling stage, and the salt tolerances were comprehensively evaluated. Eight indexes were all effective for evaluation of salt tolerance of germ plasm and materials of Elytrigia at seedling stage. Cluster analysis of salt tolerant indexes showed the 34 germ plasms and materials could be divided into three salt tolerant levels, e.g. strong （ER030, ER035, ER041, EE011, EE014, EE017, EE023, EE026, EE047, EH001, EH002, EPU02）, medium （ER008, ER014, ER027, ER032, ER037, ER038, ER044, ER045, EE007, EE027, EJ001, EPO02, EPO03, EPO04）, and the weaker （ER028, ER033, ER036, ER039, EE022, EJ003, EL001, EI022）.

关 键 词：偃麦草属 种质 苗期 耐盐性 评价 

分 类 号：S543.9[农业科学—作物学]