中文摘要：

嗜热链球菌和德氏乳杆菌保加利亚亚种是具有经济价值的乳酸菌，广泛地应用于食品工业，尤其是酸奶的生产。二者通过共生的作用使牛奶快速酸化，进而赋予酸奶特有的风味和良好的质地。本文就两种乳酸菌的全基因组、基因遗传进化、发酵特性等分子水平的研究进展进行综述，旨在为二者深入利用提供借鉴和参考。

英文摘要：

Streptococcus thermophilus and Lactobacillus delbrueckii subsp, bulgaricus are most valuable lactic acid bacteria, are widely used in food industry, especially for yogurt manufacturing. They refer yoghurt a unique flavor and good texture by means of their cooperation. The molecular research advance about whole genomes, genetic evolution, fermented characteristics of these two lactic acid bacteria were re- viewed in this paper, aiming to provide valuable references for further investigations on S. thermophilus and L. delbrueckii subsp, bulgaricus.