Fig. 2
From: Hybridization and introgression between Helicoverpa armigera and H. zea: an adaptational bridge
Genetic structure and hybrid detection. (a) Pairwise FST using 16,698 SNP markers. Darker color indicates greater degree of differentiation (b) Structure plot results from STRUCTURE (K = 2 and K = 4) and NewHybrids software based on 977 independent SNP markers. Bar-plot colors indicate group membership proportions in different values of K (e.g., 2 and 4). NewHybrids were classified as one of six possible genotypes: purebred H. armigera (dark blue) and H. zea (light blue) individuals, F1, or F2 hybrids (red and pink), or backcrosses with pure genotypes of either species. STRUCTURE and FST – the deeper the color, the higher the FST value and the greater the differentiation. Species label groups identify individuals according to mitochondrial genotyping of COI