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Bacillus velezensis is a later heterotypic synonym of Bacillus amyloliquefaciens

Bioresource Collection and Research Center, Food Industry Research and Development Institute, PO Box 246, Hsinchu 30099, Taiwan, ROC

Correspondence
Fwu-Ling Lee
fll{at}firdi.org.tw

Strain BCRC 14193, isolated from soil, shared more than 99 % 16S rRNA gene sequence similarity with Bacillus amyloliquefaciens BCRC 11601^T and Bacillus velezensis BCRC 17467^T. This strain was previously identified as B. amyloliquefaciens, based on DNA–DNA hybridization, but its DNA relatedness value with B. velezensis BCRC 17467^T was 89 %. To investigate the relatedness of strain BCRC 14193, B. amyloliquefaciens and B. velezensis, the partial sequence of the gene encoding the subunit B protein of DNA gyrase (gyrB) was determined. B. velezensis BCRC 17467^T shared high gyrB gene sequence similarity with B. amyloliquefaciens BCRC 14193 (98.4 %) and all of the B. amyloliquefaciens strains available (95.5–95.6 %). DNA–DNA hybridization experiments revealed high relatedness values between B. velezensis BCRC 17467^T and B. amyloliquefaciens BCRC 11601^T (74 %) and the B. amyloliquefaciens reference strains (74–89 %). Based on these data and the lack of phenotypic distinctive characteristics, we propose Bacillus velezensis as a later heterotypic synonym of Bacillus amyloliquefaciens.

Additional phylogenetic trees and fatty acid composition and phenotypic characteristic tables are available with the online version of this paper.

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