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Saccharomyces barnetti andSaccharomyces spencerorum: two new species ofSaccharomyces sensu lato (van der Walt)

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Abstract

In the course of a study of DNA base sequence homology, 19 strains labelled asSaccharomyces exiguus, its imperfect state,Candida holmii, orC. milleri were examined. Results confirmed the separation ofC. milleri as a separate species. The remaining strains can be divided into three distinct groups of genomic relatedness. The type cultures ofS. exiguus andC. holmii form a cluster with 10 other strains showing variable reassociation values ranging from 100 to 40%. The remaining four strains comprise two separate species showing no nucleotide relatedness between themselves nor to either theS. exiguus complex or toC. milleri. Physiological analyses demonstrate that it is possible to separate these four taxa on the basis of a few simple tests. The two new species are described respectively asSaccharomyces barnetti honoring James Barnett in recognition of his invaluable work in the field of yeast taxonomy andSaccharomyces spencerorum in honor of J.F.T. and Dorothy M. Spencer who have made innumerable contributions to the genetics and biotechnological application of yeasts.

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Vaughan-Martini, A. Saccharomyces barnetti andSaccharomyces spencerorum: two new species ofSaccharomyces sensu lato (van der Walt). Antonie van Leeuwenhoek 68, 111–118 (1995). https://doi.org/10.1007/BF00873098

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