Fig. 5From: Host-plant adaptation as a driver of incipient speciation in the fall armyworm (Spodoptera frugiperda)An evolutionary scenario of speciation in the fall armyworm. (i) Divergence selection on a locus on chromosome 12 caused reproductive isolation by reducing gene flow between ancestral corn and grass groups. The ancestral corn group experienced divergent selection on the Z chromosome as well. As a consequence, the corn group (sfC) and the grass group (sfR) had differentiated ranges of host-plants. (ii) Evolutionary forces split the corn group (sfC) into two sub-groups, mt-A and mt-B, with different mitochondrial markersBack to article page