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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