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Research article - Peer-reviewed, 2005

In vitro test of virulence in the progeny of a Heterobasidion interspecific cross

Olson A, Lind M, Stenlid J

Abstract

Annosum root rot, caused by Heterobasidion annosum s.l., is the economically most devastating disease of coniferous forests in the northern hemisphere. We have analysed virulence of the progeny isolates of a H. annosum interspecific cross between one S and one P homokaryotic isolate from North America. Virulence was measured as mortality rate among 29 pine (Pinus sylvestris) or 58 spruce (Picea abies) seedlings per homokaryotic progeny isolate. The assay showed a wide range of virulence among the 97 progeny isolates on pine and segregated as a continuous character. The heritability of virulence on pine was estimated to be 0.088 in this study. A strong correlation between virulence on pine and spruce was also found, although the range of virulence between isolates on spruce was smaller than that on pine. No correlation between high virulence and either fast radial growth rate on malt extract agar or high wood decay capacity was found

Published in

Forest Pathology
2005, volume: 35, number: 5, pages: 321-331
Publisher: BLACKWELL PUBLISHING

Authors' information

Swedish University of Agricultural Sciences, Department of Forest Mycology and Pathology
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Swedish University of Agricultural Sciences, Department of Forest Mycology and Pathology

UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use

Publication Identifiers

DOI: https://doi.org/10.1111/j.1439-0329.2005.00412.x

URI (permanent link to this page)

https://res.slu.se/id/publ/6106