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National Institute of Livestock and Grassland Science, Department of Animal Feeding and Management, Nishinasuno, Tochigi 329-2793, Japan
Correspondence
Yimin Cai
cai{at}affrc.go.jp
The taxonomic positions of Weissella kimchii and Weissella cibaria were examined using phenotypic tests, 16S rRNA gene sequencing and DNADNA hybridization. The two species displayed very similar sugar-fermentation patterns and produced the D-form of lactic acid. Phylogenetic analysis showed that W. cibaria is the closest neighbour of W. kimchii, sharing about 99·7 % similarity in the 16S rRNA gene sequence. DNADNA hybridization experiments further reinforced these results, demonstrating a 98·2 % reassociation level between W. cibaria LMG 17699T and W. kimchii DSM 14295T. On the other hand, strain RO5, an isolate from paddy rice silage, exhibited 99·4 % 16S rRNA gene sequence similarity and a DNA reassociation level of more than 97 % with both type strains. Therefore, it is proposed that the species W. kimchii should be reclassified as W. cibaria.
The GenBank accession number for the 16S rDNA sequence of strain RO5 is AF515221.
A phylogenetic tree constructed using a larger data set than shown in Fig. 1, details of acid production from carbohydrates (Table I) and DNADNA reassociation data (Table II) are available in IJSEM Online.
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