Aspen Bibliography

The mating system of Phellinus tremulae

Document Type

Article

Journal/Book Title/Conference

Mycologia

Volume

87

Issue

5

First Page

597

Last Page

603

Publication Date

1995

Abstract

Basidiocarps of Phellinus tremulae were col­ lected from trembling aspen (Populus tremuloides) in Alberta, Saskatchewan, and Ontario. A mating study based on single spore isolates of 12 of these basido­ carps was performed using carrot agar, malt agar, and malt-yeast agar media. Results from carrot agar showed that the fungus is heterothallic and has a tetrapolar mating system. Mating studies on malt agar and malt­ yeast agar were inconclusive. The mating factor genes were multiallelic. Compatible and incompatible mat­ ings could be recognized microscopically. Radial growth rate of heterokaryon colonies did not differ significantly from that of homokaryon colonies. When genetically different heterokaryotic isolates were paired on agar media a zone of antagonism formed where the two colonies met. No zone of antagonism occurred between genetically identical heterokaryon colonies.

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