Extended Data Fig. 4: Population fluctuation as a driver of selection strength.
From: Dairying, diseases and the evolution of lactase persistence in Europe

Optimized parameters, resulting selection strength- and LP allele frequency curves for population (pop.) fluctuations (fluc.), one of the four ecological proxy variables yielding likelihoods significantly better than a constant selection model. Although LP is generally thought of as a dominant trait, we only show the additive model results as the parameter estimates barely differ.