Premium
Populations of plant pathogens: some constraints on analysis of variation in pathogenicity
Author(s) -
WOLFE M. S.,
KNOTT D. R.
Publication year - 1982
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1982.tb02814.x
Subject(s) - biology , linkage disequilibrium , disequilibrium , pathogenicity , selection (genetic algorithm) , linkage (software) , population , genetics , population genetics , genotype , selective sweep , evolutionary biology , gene , haplotype , demography , medicine , sociology , ophthalmology , computer science , microbiology and biotechnology , artificial intelligence
Population surveys of plant pathogens can be used to determine the frequencies of particular pathogenicity genes and of changes in frequency with time. Such data can also be used to search for linkage disequilibrium (the non‐random association of alleles) which is of particular interest if it is due to selection. However, a linkage disequilibrium may arise for several other reasons which may be confounded with the effects of selection. Two principal reasons, often overlooked, are the lack of recombination between pathogen genotypes in the population, and the failure to define the boundaries of the sampled population. Examples from the literature illustrate some of these limitations. Recommendations are made for the conduct of surveys for particular objectives.