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Pyrolysis gas-liquid chromatography applied to a study of variation in Arthroderma tuberculatum

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Abstract

Replicates of whole colonies of four species of closely related dermatophytes were analyzed by pyrolysis gas-liquid chromatography (PGLC). The four species included fifteen strains of Arthroderma tuberculatum, and two strains each of A. benhamiae, Nannizzia gypsea and N. incurvata.

Individual/peaks on different pyrograms were identified as homologous with the aid of internal markers by the superimposition of pyrograms. The peak height data extracted from the pyrograms of the fungal samples were analyzed to compute average similarities between pairs of pyrograms. The average was calculated with each peak weighted equally, and log weighted for its information content. The results of the cluster analyses of proximities were generally similar.

Most, but not all, replicates of each strain were similar enough to be clustered together. Some strains belonging to the same species were also similar enough to be grouped in one cluster. Other strains of a single species varied sufficiently to be put in separate clusters. The nearest neighbour to each OTU (pyrogram) was always a replicate of the same strain.

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  1. Department of Medical Bacteriology, University of Alberta, Edmonton, Alberta, Canada

    James D. Brosseau & J. W. Carmichael

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  1. James D. Brosseau
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  2. J. W. Carmichael
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Brosseau, J.D., Carmichael, J.W. Pyrolysis gas-liquid chromatography applied to a study of variation in Arthroderma tuberculatum. Mycopathologia 63, 67–79 (1978). https://doi.org/10.1007/BF00441251

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