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在水稻发芽期，筛选耐盐性品种的最适ＮａＣ１浓度是１．５％。在这个浓度 下，调查了九个亚洲国家的３０６个品种的耐盐性。参照程氏形态分类法的稃毛标准 将参试品种分成籼和粳，籼稻品种比粳稻更耐盐。酯酶（ Ｅｓｔ）同工酶分析也印证 了这一结果。酯酶同工酶的等位基因 Ｅｓｔ－２２、Ｅｓｔ．３２和 Ｅｓｔ．４１可以用来鉴别籼稻品 种，而Ｅｓｔ．２°、Ｅｓｔ－３１和Ｅｓｔ－４°可以识别粳稻品种。具有等位基因Ｅｓｔ－２２、Ｅｓｔ－３３和 Ｅｓｔ－４１的品种比具有Ｅｓｔ－２°、Ｅｓｔ－３１和Ｅｓｔ－４°的品种更耐盐。比较七个酯酶同工酶 酶谱的品种耐盐性，发现有７０％的具有Ｅｓｔ－２２的品种在１．５％ＮａＣ１浓度下发芽率 超过５０％。因此，等位基因Ｎ Ｅｓｔ－２２可能是品种耐盐性的一个标志。大多数马来西 亚的品种是耐盐的，其次为缅甸、中国和孟加拉的品种。大多数泰国、菲律宾和日 本的品种对盐敏感。
At the germination stage of rice, the optimum NaC1 concentration for screening salt-tolerant cultivars was 1.5%. At this concentration, salt tolerance of 306 varieties in nine Asian countries was investigated. According to the Cheng’s morphological classification, the test standard was divided into indica and japonica varieties, and indica rice varieties were more salt-tolerant than japonica rice. Esterase (Est) isozyme analysis also confirmed this result. Esterase isoenzyme allele Est-22, Est. 32 and Est. 41 can be used to identify indica varieties, while Est. 2 °, Est-31 and Est-4 ° can identify japonica varieties. Varieties with alleles Est-22, Est-33 and Est-41 are more salt-tolerant than varieties with Est-2 °, Est-31 and Est-4 °. Comparing the salt tolerance of seven esterase isozymes, it was found that 70% of varieties with Est-22 germinated more than 50% at 1.5% NaC1 concentration. Therefore, the allele N Est-22 may be a marker of salt tolerance. Most Malaysian varieties are salt tolerant, followed by Burma, China and Bengal varieties. Most Thai, Philippine and Japanese varieties are salt-sensitive.