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目的：考察各地红曲产生菌株间以及本实验室诱变育种所得红曲霉属真菌ＭＳ１８号菌株的亲缘关系。方法：对从各地红曲药材样品中分离纯化到的１２株红曲霉属真菌（ＭＳ０１～１２号）及ＭＳ１８号菌株进行可溶性蛋白、酯酶和超氧化物歧化酶（ＳＯＤ）的凝胶电泳分析。结果：ＭＳ０１～１２号菌株的３种电泳图谱完全一致，而ＭＳ１８号菌株的电泳图谱发生了较大变化，这与形态学研究结果是一致的。结论：ＭＳ０１～１２号菌株为同１个种，而ＭＳ１８号菌株与ＭＳ０１～１２号不是同１个种或是它们的１个变种。
OBJECTIVE: To investigate the genetic relationship between Monascus spp. strains and Monascus spp. MS18 strains that were obtained from the mutation-producing strains in different regions. METHODS: Gel electrophoresis analysis of soluble protein, esterase and superoxide dismutase (SOD) of 12 strains of Monascus spp. (MS01～12) and MS18 isolated and purified from red yeast medicinal material samples from different regions. . Results: The electrophoresis patterns of strains MS01～12 were completely identical, while the electrophoresis pattern of strain MS18 changed greatly. This is consistent with the results of morphological study. Conclusion: The strains MS01～12 are the same species, while the strains MS18 and MS01～12 are not the same species or one of them.