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18S rDNA for species of Leptolegnia and other Peronosporomycetes: justification for the subclass taxa Saprolegniomycetidae and Peronosporomycetidae and division of the Saprolegniaceae sensu lato into the Leptolegniaceae and Saprolegniaceae

Published online by Cambridge University Press:  01 September 1999

M. W. DICK ,
MARY C. VICK ,
J. G. GIBBINGS ,
T. A. HEDDERSON  and
CLAUDIA C. LOPEZ LASTRA
M. W. DICK
Affiliation:
Centre for Plant Diversity and Systematics, University of Reading, Reading RG6 6AU, U.K.
MARY C. VICK
Affiliation:
Centre for Plant Diversity and Systematics, University of Reading, Reading RG6 6AU, U.K.
J. G. GIBBINGS
Affiliation:
Centre for Plant Diversity and Systematics, University of Reading, Reading RG6 6AU, U.K.
T. A. HEDDERSON
Affiliation:
Centre for Plant Diversity and Systematics, University of Reading, Reading RG6 6AU, U.K.
CLAUDIA C. LOPEZ LASTRA
Affiliation:
Researcher of CONICET, Cepave, Calle 2, No & 584, (1900) La Plata, Argentina
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Abstract

The 18S rDNA data base for mainstream Peronosporomycetes has been substantially increased. The sub-class divide between the Peronosporomycetidae and the Saprolegniomycetidae is supported. The deep clade separation of the Leptomitales within the Peronosporomycetidae is reinforced and support is provided for divergences within the Phytophthora and Pythium lines. A new family for the Leptolegnia lineage is proposed from the Saprolegniaceae sensu lato.

Type
Research Article
Information
Mycological Research , Volume 103 , Issue 9 , September 1999 , pp. 1119 - 1125
Copyright
© The British Mycological Society 1999

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