- Evidence of the genetic diversity and clonal population structure of Oenococcus oeni strains isolated from different wine-making regions of China
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Dongliang Yu , Kan Shi , Xiangyuan Wen , Fangshu Xie , Tao Wang , Shuwen Liu , Ling He
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J. Microbiol. 2018;56(8):556-564. Published online July 25, 2018
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DOI: https://doi.org/10.1007/s12275-018-7568-7
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Studies of the genetic diversity and population structure of
Oenococcus oeni (O. oeni) strains from China are lacking
compared to other countries and regions. In this study, amplified
fragment length polymorphism (AFLP) and multilocus
sequence typing (MLST) methods were used to investigate
the genetic diversity and regional evolutionary patterns
of 38 O. oeni strains isolated from different wine-making
regions in China. The results indicated that AFLP was
markedly more efficient than MLST for typing O. oeni strains.
AFLP distinguished 37 DNA patterns compared to 7 sequence
types identified using MLST, corresponding to discriminatory
indices of 0.999 and 0.602, respectively. The AFLP results
revealed a high level of genetic diversity among the O.
oeni strains from different regions of China, since two subpopulations
and an intraspecific homology higher than 60%
were observed. Phylogenetic analysis of the O. oeni strains
using the MLST method also identified two major phylogroups,
which were differentiated into two distinct clonal
complexes by minimum spanning tree analysis. Neither intragenic
nor intergenic recombination verified the existence
of the clonal population structure of the O. oeni strains.
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