Fig. 2: Summary of population genetic patterns.

a Map of sample locations with points of shapes based on nominal taxa and colored for different populations within taxa (Supplementary Table 1). b Ordination of genetic variation via principal component analysis (PCA). Points denote individuals (a few low-coverage individuals were removed for visualization). c Boxplots of admixture proportion estimates from entropy with k = 2 source populations for all populations included in the study (n = 835 butterflies from 23 populations). Boxes denote the 1st and 3rd quartile with the median given by the midline; whiskers extend to the minimum and maximum value or 1.5x the interquartile range with points for more extreme values. Tick marks below the plots identify populations based on the population abbreviations in Supplementary Table 1. d Boxplots of admixture proportion estimates from entropy with k = 2 source populations for all populations except L. idas (N = 659 butterflies from 18 populations), and boxes defined as in panel (c). Source data are provided as a Source Data file.