Every definition of the adaptive value of populations entails difficulties and uncertainties. The adaptive value cannot be derived easily from the coefficient of selection, but this is only one of the difficulties. Every function that may be useful to define the adaptive value is valid only for a particular usually narrow, situation. Meaningful results can only be expected where the definition reflects the actual process of adaptation correctly. The principal difficulties appear to lie in the fact that adaptation to different environments imposes different demands upon the population, which, in turn, may have several possible solutions at its disposal.
KeywordsForest Tree Effective Population Size Adaptive Strategy Additive Genetic Variance Marginal Population
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