Selection differentials and selection coefficients |
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Authors: | Milkman R |
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Affiliation: | Department of Zoology, The University of Iowa, Iowa City, Iowa 52242. |
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Abstract: | Proof is offered that s ig for all forms of selection where fitness is a nondecreasing function of a normally distributed phenotype (called fitness potential); s is selection coefficient, i is standard selection differential, and g is standard differential effect of a locus genotype. Evidence is presented that the cost of selection does not limit genic polymorphism; that truncation selection is not necessary for high cost-efficiency; and that opposing directions of selection in a heterogeneous environment do not reduce cost-efficiency critically. |
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