Fig. 2: Genomics of a migratory divide in the butterfly Vanessa cardui.
From: A north-south hemispheric migratory divide in the butterfly Vanessa cardui
A Collection of sites for 300 V. cardui specimens. B Results from fineRADstructure, a Bayesian co-ancestry based analysis, using 2855 SNPs belonging to the region with the largest FST differentiation in chromosome 8 (excluding repetitive regions). Two clusters of high shared ancestry were recovered, corresponding to the northern and southern hemispheres. Some individuals (dark blue) were shown to be heterozygous for the inversion. C Principal-component analysis (PCA) in the differentiated region in chromosome 8 for 290 individuals using 976 SNPs. The two main clusters obtained correspond to the North and South hemisphere populations. Samples in grey correspond to potential heterozygotes. Collection sites information is available in the Supplementary Data 2. Data used for B and C are deposited into the OSF repository and are available at the following URL: https://osf.io/6u32k/.
