Genome‑Based Reclassification of Dactylosporangium matsuzakiense Shomura and Niida 1983 As A Later Heterotypic Synonym of Dactylosporangium vinaceum Shomura et al. 1983 and Proposal of Dactylosporangium vinaceum subsp. vinaceum subsp. nov. and Dactylosporangium vinaceum subsp. matsuzakiense subsp. nov
摘要
The present study reports comprehensive phylogenomic and comparative analyses between Dactylosporangium vinaceum NRRL B-16297 T and Dactylosporangium matsuzakiense VKM Ac-1321 T to clarify their taxonomic relationship. Genomic relatedness analyses between both type strains yielded an average nucleotide identity (ANI) of 97.6%, an average amino acid identity (AAI) of 99.1% and an estimated digital DNA-DNA (dDDH) hybridization of 79.1%, indicating a shared taxonomic position for D. vinaceum and D. matsuzakiense. This relationship is confirmed by phylogenetic analysis based on the 16S rRNA gene, whole genome and core genes, which indicates that the strains studied form a well-supported monophyletic group. Based on these comprehensive findings, we propose to reclassify Dactylosporangium vinaceum NRRL B-16297 T (= SF-2127 T) and Dactylosporangium matsuzakiense VKM Ac-1321 T (= SF-2052 T) as the same species, in which the name should be Dactylosporangium vinaceum Shomura et al. 1983. Furthermore, based on dDDH value and associated phenotypic data, type strain NRRL B-16297 T represents Dactylosporangium vinaceum subsp. vinaceum subsp. nov. and type strain VKM Ac-1321 T represents Dactylosporangium vinaceum subsp. matsuzakiense subsp. nov.