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A Population Genetic Model of the Alternate Host System of Cronartium quercuum f. sp. fusiforme

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By planting pines selected for resistance to fusiform rust, one might as a result select indirectly for more virulent rust strains. A simplified mathematical model was developed to describe the population genetics of the rust fungus, which is unusually complex because of the alternate host system. The mathematical model also formed the basis for a computer model, simulating the selection process. Five hypothetical situations were examined. If a gene for virulence was favored on the pine, but selectively neutral on the oak, it would become the predominant gene in the rust in about 20 years. If a gene for increased virulence would be selected for on the pine, but selected against on the oak, it would become the predominant gene in the rust in about 50 years. Forest Sci. 28:745-752.

Keywords: Pinus elliottii; Pinus taeda; Quercus; fusiform rust; loblolly pine; rust resistance; slash pine; virulence

Document Type: Journal Article

Affiliations: Principal Geneticist, Texas Forest Service, and Professor, Texas Agricultural Experiment Station, College Station, TX 77843

Publication date: 1982-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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