Fig. 4From: Hybridization and introgression between Helicoverpa armigera and H. zea: an adaptational bridgeMaximum-likelihood tree constructed in Treemix based on 977 SNP markers with four migration events. Most migration events tended to move from H. armigera to H. zea. Among H. armigera, migration events occurred from AGOMO to ABASDBack to article page