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Table 1 Alternative hypotheses for the microevolution of Pra Nsp.

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