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. 2009 Jul 3;5(7):e1000550. doi: 10.1371/journal.pgen.1000550

Figure 2. Divergence and gene flow between D. persimilis and D. ps. pseudoobscura.

Figure 2

Genic introgression between the two North American sister species, D. persimilis (Dper) and D. ps. pseudoobscura (Dpse-NA), was assayed by comparison to the non-hybridizing isolated South American subspecies, D. ps. bogotana (Dpse-SA). Recent genic introgression between Dper and Dpse-NA is expected to generate different levels of divergence (Dper-Dpse-NA<Dper-Dpse-SA) while an absence of gene flow is expected to produce equivalent levels of divergence (Dper-Dpse-NA = Dper-Dpse-SA). Differences in lineage-specific evolutionary rates were assessed using a nonhybridizing species outgroup, D. miranda (Dmir).