Genetics and Population Structure of Heterobasidion annosum with Special Reference to Western North America

Abstract

Recent advances in the genetics and population biology of Heterobasidion annosum are reviewed. H. annosum is a heterothallic (outbreeding) basidiomycete with a unifactorial, multiallelic incompatibility system which regulates mating. H. annosum in western North America consists of two intersterility groups (biological species) which can be identified through mating tests and isozyme analysis. Intersterility groups in western North America appear to be host specific. Intersterility between groups is attributable to specific genes. Intergroup hybrids have been formed in the laboratory, but have not been identified from the field.

Parent Publication

• Proceedings of the symposium on research and management of annosus root disease (Heterobasidion annosum) in western North America; April 18-21, 1989; Monterey, CA.

Citation

Chase, Thomas E. 1989. Genetics and Population Structure of Heterobasidion annosum with Special Reference to Western North America. In: Otrosina, William J.; Scharpf, Robert F., technical coordinators. 1989. Proceedings of the symposium on research and management of annosus root disease (Heterobasidion annosum) in western North America; April 18-21, 1989; Monterey, CA. Gen. Tech. Rep. PSW-GTR-116. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; p. 19-25