DNA-DNA relatedness among Thermoactinomyces species: Thermoactinomyces candidus as a synonym of Thermoactinomyces vulgaris and Thermoactinomyces thalpophilus as a synonym of Thermoactinomyces sacchari

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Title
DNA-DNA relatedness among Thermoactinomyces species: Thermoactinomyces candidus as a synonym of Thermoactinomyces vulgaris and Thermoactinomyces thalpophilus as a synonym of Thermoactinomyces sacchari
Author(s)
Jung Hoon Yoon; Yong Kook Shin; Yong Ha Park
Bibliographic Citation
International Journal of Systematic and Evolutionary Microbiology, vol. 50, no. 5, pp. 1905-1908
Publication Year
2000
Abstract
DNA-DNA relatedness of all validly described Thermoactinomyces species was determined to infer the genetic relationships between them. The levels of DNA-DNA relatedness among the type strains of Thermoactinomyces species ranged from 2.5 to 92.8%. Based on DNA relatedness data, the type strains of Thermoactinomyces intermedius, Thermoactinomyces putidus, Thermoactinomyces dichotomicus and Thermoactinomyces peptonophilus were considered to be distinct species of the genus Thermoactinomyces. However, the relationship between the type strains of Thermoactinomyces vulgaris and Thermoactinomyces candidus and the relationship between the type strains of Thermoactinomyces sacchari and Thermoactinomyces thalpophilus were reevaluated from levels of DNA-DNA relatedness. The independent DNA relatedness values between Thermoactinomyces vulgaris KCTC 9076(T) and Thermoactinomyces candidus KCTC 9557(T) were 90.8 and 92.8%. Thermoactinomyces thalpophilus KCTC 9789(T) and Thermoactinomyces sacchari KCTC 9790(T) exhibited independent values of 85.6 and 87.3%. Accordingly, on the basis of DNA-DNA relatedness data together with 16S rDNA sequence data determined recently, it is proposed that Thermoactinomyces candidus should be considered as a synonym of Thermoactinomyces vulgaris and Thermoactinomyces thalpophilus be considered as a synonym of Thermoactinomyces sacchari.
Keyword
thermoactinomyces speciesDNA-DNA relatednesstaxonomic reevaluation
ISSN
0020-7713
Publisher
Microbiology Soc
DOI
http://dx.doi.org/10.1099/00207713-50-5-1905
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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