Natural Selection and Continuous Variation
In his paper to this meeting, Dr. Lewontin stresses the difficulty in using some of the classical formulae of population genetics, even when we deal only with a single locus at which the genotypes can be accurately identified. One of the problems is the difficulty of transferring the concept of fitness from the context of changes of gene frequency within the population, to changes of the ability of the population as a whole to survive — a problem made more complicated by the possibility of frequency dependent selection. He indicated, very briefly, the way in which there are difficulties in discussing natural selection for continuous characters, and I would like to devote the greater part of my talk to this particular problem.
KeywordsMaize Covariance Expense Alan
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