Ecological Interactions and Biological Control

By David A. Andow; David W. Ragsdale et al. | Go to book overview

mize host fitness in either the hard selection or the competition version of the model, it does reduce host fitness to a level very near that which would be reached at the internal equilibrium point. For successful biocontrol of a weed with a biotrophic pathogen, it is not necessary that resistance be completely absent from the host population, nor is it even necessary that an equilibrium be reached between resistance and virulence. What is absolutely essential is that the pathogen must have virulence genes to match any resistance genes present in the host population.


References

Burdon, J. J. 1987. Diseases and plant population biology. Cambridge: Cambridge University Press.

Clarke, D. D., E. S. Campbell, and J. R. Bevan. 1990. Genetic interactions between Senecio vulgaris and the powdery mildew fungus Erysiphe fischeri. In Pests, pathogens and plant communities, ed. J. J. Burdon and S. R. Leathers, 189-217. Oxford: Blackwell.

Day, P. R. 1974. Genetics of host-parasite interaction. San Francisco: Freeman.

Fleming, R. A. 1980. "Selection pressures and plant pathogens: Robustness of the model". Phytopathology 70:175-78.

Leonard, K. J. 1969. Selection in heterogeneous populations of "Puccinia graminis" f.sp. avenae. Phytopathology 59:1851-57.

_____. 1977. "Selection pressures and plant pathogens". Annals of the New York Academy of Sciences 287:207-22.

_____. 1985. "Population genetics of gene-for-gene interactions between plant host resistance and pathogen virulence". In Proceedings 15th International Congress of Genetics, New Delhi, India. Vol. 4. Applied Genetics, ed. V. L. Chopra, B. C. Joshi, R. P. Sharma, and H. C. Bansal , 131-48. New Delhi: Oxford & IBH.

_____. 1994. "Stability of equilibria in a gene-for-gene coevolution model of host-parasite interactions". Phytopathology 84:70-77.

Leonard, K. J., and R. J. Czochor. 1980. "Theory of genetic interactions among populations of plants and their pathogens". Annual Review of Phytopathology 18:237-58.

Sedcole, J. R. 1978. "Selection pressures and plant pathogens: Stability of equilibria". Phytopathology 70:175-78.

Templeton, G. 1982. "Status of weed control with plant pathogens". In Biological control of weeds with plant pathogens, ed. R. Charudattan and H. L. Walker, 29-44. New York: Wiley.

Thompson, J. N., and J. J. Burdon. 1992. "Gene-for-gene coevolution between plants and parasites". Nature 360:121-25.

Wahl, I. 1970. "Prevalence and geographic distribution of resistance to crown rust in Avena sterilis". Phytopathology 60:746-49.

Wallace, B. 1975. "Hard and soft selection revisited". Evolution 29:465-73.

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