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利用16S rDNA序列及tuf-RFLP鉴定蒙古国发酵乳中的乳酸菌

China Dairy Industry(2011)

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Abstract
运用16S rDNA序列分析和tuf-RFLP技术对采于蒙古国扎布汗省的25份发酵乳样中分离出的110株乳酸菌进行鉴定.首先将分离的110株乳酸菌的16S rRNA基因进行扩增,测序并构建系统发育树,初步鉴定为41株嗜热链球菌,40株瑞士乳杆菌,11株德氏乳杆菌保加利亚亚种,2株发酵乳杆菌,1株乳明串珠菌,2株肠膜明串肠膜亚种,1株乳酸乳球乳酸亚种和12株属于干酪族的菌株.由于干酪乳杆菌族的16S rDNA序列差异很小,故采用tuf-RFLP 技术对这12株进行了进一步的验证,通过分离菌株与模式菌株tuf-RFLP图谱的比较分析,结果表明这12株菌均为干酪乳杆菌.
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Key words
phylogenetic tree,tuf-RFLP,Lactic acid bacteria,16S rDNA sequence analysis
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