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Principal component analyses (PCA) of genetic variation for populations of Moroccan locust for (a) all populations and (b) only considering populations from the Iberian Peninsula. Dashed brownish and greenish ellipses encircle Iberian and Canarian populations, respectively. The number of loci used in the different analyses is indicated in each panel. Populations with an asterisk indicate pest outbreaks during the sampling year. Population codes are described in Table 1
