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期 刊 ：植物遗传资源学报 2013年 15卷 6期

关键词：高粱种质；耐盐评价；筛选；分级；

Keywords:Sorghum accession, Saline-alkaline tolerance, Screen, Evaluation methodology,

摘 要 ：本文用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。

Abstract:Seedlings with 3-5 leaves of five hundred and sixty-eight sorghum accessions were treated with 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 correlationship between the checked characters and fresh spick 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.

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