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Analyses of genetic variation suggest that pine rusts Cronartium flaccidum and Peridermium pini belong to the same species

Published online by Cambridge University Press:  09 May 2002

Jarkko HANTULA ,
Risto KASANEN ,
Juha KAITERA  and
Salvatore MORICCA
Jarkko HANTULA
Affiliation:
Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland.
Risto KASANEN
Affiliation:
Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland.
Juha KAITERA
Affiliation:
Finnish Forest Research Institute, Rovaniemi Research Station, P.O. Box 16, FIN-96301 Rovaniemi, Finland.
Salvatore MORICCA
Affiliation:
CNR, Istituto per la Patologia degli Alberi Forestali, Piazzale delle Cascine 28, I-50144 – Firenze, Italy.
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Abstract

Cronartium flaccidum and Peridermium pini are rust fungi occurring on two-needle hard pines. According to previous molecular and morphological analyses, they are very closely related despite differences in their life-cycles. In this study we showed that although a low level of genetic differentiation occurs among populations of both P. pini and C. flaccidum, there is no overall differentiation between the two rusts, and in this respect they resemble a single taxon. We also observed evidence for linkage disequilibrium occurring between different alleles of separate loci of Peridermium pini suggesting that its population structure would be clonal. This suggests that strains of P. pini would have originated as asexual or self-fertilizing host range mutants of C. flaccidum.

Type
Research Article
Information
Mycological Research , Volume 106 , Issue 2 , February 2002 , pp. 203 - 209
Copyright
© The British Mycological Society 2002

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