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Proposal to Reclassify Companilactobacillus futsaii subsp. chongqingensis as a Later Heterotypic Synonym of Companilactobacillus futsaii subsp. futsaii

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Abstract

Previous studies have shown that Lactobacillus futsaii (now Companilactobacillus futsaii) can be subdivided at the subspecies level. The main purpose of this study is to explore whether this is correct by using a polyphasic taxonomic approach. Lactobacillus futsaii subsp. chongqingii was proposed and effectively published in 2019. The names L. futsaii subsp. chongqingensis corrig. and Lactobacillus futsaii subsp. futsaii were not validated until March 2023. However, in the reclassification of the genus Lactobacillus by Zheng et al. in April 2020, L. futsaii was transferred to Companilactobacillus as Companilactobacillus futsaii. So Lactobacillus futsaii subsp. chongqingensis and Lactobacillus futsaii subsp. futsaii should be transferred to Companilactobacillus futsaii now. In the present study, the relationship between L. futsaii subsp. chongqingensis and L. futsaii subsp. futsaii was re-evaluated. The type strains of L. futsaii subsp. chongqingensis and L. futsaii subsp. futsaii shared identical pheS and rpoA sequences, high dDDH value, similar phenotypic characteristics and fatty acid compositions, indicating that they belonged to the same subspecies. Here, we propose to reclassify Lactobacillus futsaii subsp. chongqingensis and Lactobacillus futsaii subsp. futsaii as Companilactobacillus futsaii subsp. chongqingensis comb. nov. and Companilactobacillus futsaii subsp. futsaii comb. nov., respectively, and Companilactobacillus futsaii subsp. chongqingensis as a later heterotypic synonym of Companilactobacillus futsaii subsp. futsaii.

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Fig. 1

Abbreviations

ANI:

Average nucleotide identity

dDDH:

Digital DNA-DNA hybridization

FAMEs:

Fatty acid methyl esters

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Funding

This work was supported by the National Natural Science Foundation of China (No. 31471594) and “Characteristic Probiotics and New Fermented Food” Team in Northeast Agricultural University (No. 50940912, Harbin, China).

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Authors and Affiliations

  1. College of Life Sciences, Northeast Agricultural University, Harbin, 150030, People’s Republic of China

    Cheng-Shan Jiang & Chun Tao Gu

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  1. Cheng-Shan Jiang
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  2. Chun Tao Gu
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Contributions

CSJ and CTG conceived and designed the experiments. CSJ performed the experiments. CSJ and CTG analyzed the data. CSJ and CTG wrote and revised the paper.

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Correspondence to Chun Tao Gu.

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Jiang, CS., Gu, C.T. Proposal to Reclassify Companilactobacillus futsaii subsp. chongqingensis as a Later Heterotypic Synonym of Companilactobacillus futsaii subsp. futsaii. Curr Microbiol 81, 17 (2024). https://doi.org/10.1007/s00284-023-03541-4

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