高粱耐盐性评价方法研究及耐盐碱资源的筛选.docVIP

高粱耐盐性评价方法研究及耐盐碱资源的筛选 籍贵苏1，杜瑞恒1, 刘国庆1，李素英1，侯升林1，吕芃1， 马雪1, 赵全民2，，张之越3 （1河北省农林科学院谷子研究所/河北省杂粮研究实验室/国家谷子改良中心，石家庄， 050035;2永年县农牧局，永年，057150; 3北京化工大学北方学院，北京，065201） 摘要 本文用5.43g/L (50mmol/L)的配比盐水溶液对3-5叶期高粱幼苗进行处理，用幼苗相对成活率对568份高粱种质进行分级，结果显示：5%的种质具有3级以上的耐盐性。此法可以用来进行大量种质的苗期耐盐筛选。根据植株在不同含盐量的盐碱地上生长的性状差异，对成株期的高粱进行耐盐鉴定，利用处理间性状的差异及各性状与穗重和秆重的相关性构建一个耐盐指数来评价材料对盐碱的耐性，从而对18个高粱品种和品系进行了分级，适合于盐碱地推广品种的筛选。 关键词 高粱种质；耐盐评价；筛选；分级 Methodology and Screen of Saline-alkaline Tolerance in Sorghum Accessions JI Gui-su1, DU Rui-heng1, LIU Guo-qing1, LI Su-ying1, HOU Sheng-lin1，LV Peng1, MA Xue1 ZHAO Quan-min2 , ZHANG Zhi-yue3 (1 Millet crops Institute ,Hebei Academy of Agriculture and Forestry sciences/ Minor Cereals Research Lab of Hebei Province/ National Millet Crops Improvement Center, Shijiazhuang 050035: 2Agriculture Bureau of Yongnian county, yongnian, 057150: 3North College of Beijing University of Chemical Technology, Beijing, 065201) Abstract: Seedlings with 3-5 leaves of five hundred and sixty-eight sorghum accessions were treated with 5.43g/L (50mmol/L) saline-alkaline solution to evaluate the tolerance by scoring the seeding survival percentage. Result showed that about 5% of the accessions possessed a third grad and above tolerance to saline-alkaline. The methodology could be applied for saline-alkaline tolerance evaluation in seedling stage. However, the saline-alkaline tolerance of mature plants were screened with the following index system, witch the agronomic traits showed significantly different among different treatments and the correlation between the checked characters and fresh spike weight and fresh stem weight. Eighteen sorghum cultivars were screened using above evaluation system. This system was suitable for cultivars screen of Saline-alkaline tolerance in coastal area. Key words: Sorghum accession; Saline-alkaline tolerance; Screen; Evaluation methodology 利用和改良盐渍化土地、充分利用光资源是农业生产的重要问题，筛选一些耐盐作物是解决这一问题的主要途径。我国环渤海地区具有数百万公顷的盐渍化土地，玉米、小麦等大田作物不宜生长，而种植耐盐性好的能源作物、牧草和经济作物是促进该区农业发展和经