食品科学 ›› 2010, Vol. 31 ›› Issue (7): 177-181.doi: 10.7506/spkx1002-6300-201007039

• 生物工程 • 上一篇    下一篇

不同品牌酸乳中德氏乳杆菌的分离鉴定及RAPD分析

马成杰1,吴正钧1,杜昭平2,刘 鑫2,马爱民2 ,*   

  1. 1. 光明乳业技术中心 2. 华中农业大学食品科学技术学院
  • 收稿日期:2009-07-27 出版日期:2010-04-01 发布日期:2010-12-29
  • 通讯作者: 马爱民 E-mail:aiminma@mail.hzau.edu.cn
  • 基金资助:

    “十一五”国家科技支撑计划项目(2006BAD04A14)

Isolation, Identification and RAPD Analysis of Lactobacillus delbrueckii from Different Commercial Brands of Yogurts

MA Cheng-jie1,WU Zheng-jun1,DU Zhao-ping2,LIU Xin2,MA Ai-min2,*   

  1. 1. Technology Center, Bright Dairy & Food Co. Ltd., Shanghai 200072, China;
    2. College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2009-07-27 Online:2010-04-01 Published:2010-12-29
  • Contact: MA Ai-min E-mail:aiminma@mail.hzau.edu.cn

摘要:

从不同品牌的10 种酸乳中分离得到10 株德氏乳杆菌(Lactobacillus delbrueckii),经生理生化实验及特异性PCR 鉴定,L.d3、L.d4、L.d5、L.d6、L.d8、L.d10 为德氏乳杆菌保加利亚亚种(Lactobacillus delbrueckii subsp.bulgaricus),L.d1、L.d2、L.d7、L.d9 为德氏乳杆菌乳酸亚种(Lactobacillus delbrueckii subsp. lactis)。利用24 个随机引物对上述10 株德氏乳杆菌进行随机扩增DNA 多态性分析,并使用NTSYSpc-2.10e 软件对扩增图谱数据进行处理,得出10 个菌株之间的遗传相似系数矩阵及聚类分析图。结果表明,10 个菌株相互间的遗传相似系数在0.4167~0.8833 之间,不同菌株间存在一定的亲缘关系及遗传异质性。

关键词: 德氏乳杆菌, PCR, RAPD, 聚类分析

Abstract:

Ten strains of Lactobacillus delbrueckii were isolated from ten commercial brands of yogurts. L.d 3, L.d 4, L.d 5, L.d 6, L.d 8 and L.d 10 were identified as Lactobacillus delbrueckii subsp. bulgaricus, and L.d 1, L.d 2, L.d 7 and L.d 9 were identified as Lactobacillus delbrueckii subsp. lactis according to physiological and biochemical tests and specific PCR identification. The genetic diversity of ten strains was evaluated through random amplified polymorphic DNA (RAPD) analysis using 24 random primers, and the similarity coefficient matrix and clustering analysis were achieved according to statistical analysis of fingerprinting data using NTSYSpc-2.10e software. Results indicated that genetic similarity coefficients of ten strains were ranged in 0.4167 and 0.8833. The genetic relationship and heterogeneity existed among different strains to a certain extent.

Key words: Lactobacillus delbrueckii, PCR, RAPD, clustering analysis

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