低产杂醇油啤酒酵母菌株的选育  

Breeding of Beer Yeast with Low Yield of Fusel Oil by UV Treatment

作　　者：肖冬光[1] 韩涛[1] 李家飚[1] 

机构地区：[1]天津科技大学生物工程学院,天津300222

出　　处：《酿酒科技》2005年第4期31-33,共3页Liquor-Making Science & Technology

摘　　要：以啤酒酵母SC-4为出发菌株,经UV诱变育种后获得一株亮氨酸缺陷型菌株MS-11。与出发菌株相比,该菌株杂醇油生成量下降了25.47%,其他发酵性能基本保持不变。MS-11在较高主发酵温度(14℃)下的啤酒发酵实验表明,其杂醇油生成量为65.35mg/L,与出发菌株在9℃发酵条件下的杂醇油生成量63.24mg/L基本相当,而双乙酰的生成量则下降了15.13%。After the UV treatment to the parent strain of beer yeast SC-4, one strain named MS-11 was selected. Comparing to the parent strain, its yield of total fusel oil was lower by 25.47 % and other fermentation characteristics were almost invariable. The fermentation experiment by mutant strain MS-11 under high temperature 14 ℃ showed that it′s yield of fusel oil was 65.35 mg/L, which was near to that of the parent strain 63.24 mg/L at 9 ℃, moreover, the diacetyl content was reduced by 15.13 %.

关 键 词：微生物 啤酒酵母 杂醇油 诱变 

分 类 号：TS261.1[轻工技术与工程—发酵工程] TS261.4[轻工技术与工程—食品科学与工程]