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Phylogenetic relationship of Sclerotium rolfsii (teleomorph Athelia rolfsii) and S. delphinii based on ITS sequences

Published online by Cambridge University Press:  13 May 2003

Ikuko OKABE  and
Naoyuki MATSUMOTO
Ikuko OKABE
Affiliation:
National Institute for Agro-Environmental Sciences, Kannondai, Tsukuba, Ibaraki 305-8604, Japan. E-mail: [email protected]
Naoyuki MATSUMOTO
Affiliation:
National Institute for Agro-Environmental Sciences, Kannondai, Tsukuba, Ibaraki 305-8604, Japan. E-mail: [email protected]
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Abstract

The phylogenetic relationships of the stem rot pathogens Sclerotium rolfsii and S. delphinii were examined, based on their rDNA ITS sequences. The ITS regions were cloned and sequenced to identify three distinct ITS types: r-1, r-2, and r-3. Two different ITS types exist within S. rolfsii and S. delphinii strains. Japanese strains and one strain of S. rolfsii from the USA contain types r-1 and r-2, whereas another strain from the USA and one from Chile have only one ITS type, r-2. S. delphinii strains have types r-1 and r-3. We discuss the implications of the common presence of ITS type r-1 for the taxonomy and evolution of this species complex.

Type
Research Article
Information
Mycological Research , Volume 107 , Issue 2 , February 2003 , pp. 164 - 168
Copyright
© The British Mycological Society 2003

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