From: Microevolutionary dynamics of a macroevolutionary key innovation in a Lepidopteran herbivore
Hypothesis | Assumption | Expected pattern of variation |
---|---|---|
H0-demography | No adaptive role | Reflects demographic history |
H1-local adaptation | Unique local host plant adaptation = directional selection within populations | Variation within populations < variation among populations |
H2- diversifying/balancing selection | Generalist response to diverse host plant assemblages = diversifying/balancing selection | Variation within populations ≥ variation among populations |
H3-directional selection | Purifying selection upon optimal genotype = directional selection across populations | Little variation within and among populations |