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Phenotype‐phenotype analysis: field application of the gene‐for‐gene hypothesis in host‐pathogen relations
Author(s) -
WOLFE M. S.,
BARRETT J. A.,
SHATTOCK R. C.,
SHAW D. S.,
WHITBREAD R.
Publication year - 1976
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1976.tb00574.x
Subject(s) - biology , phenotype , virulence , pathogen , genetics , population , gene , host (biology) , demography , sociology
SUMMARY The frequency of occurrence of a virulence phenotype in a pathogen population is equivalent to its probability of occurrence in that population. From the compound probability law it can thus be shown that the expected frequency of occurrence of phenotypes with combined virulences is a product of the observed frequencies of the individual virulences. In many host‐pathogen interactions, observed and expected frequencies of combined virulences are closely similar. Deviations from expectation, in both directions, do occur however, and these may be of crucial importance in disease control.