Task: Answer Verification
Input (English): Question: Do postzygotic barriers isolate sympatric species of Cyrtandra ( Gesneriaceae ) in Hawaiian montane forest understories?
Answer: Results suggest that boundaries between sympatric Cyrtandra species in Hawaii are maintained predominantly through postzygotic barriers. Observations from between-island crosses indicate that postzygotic barriers can arise in allopatry, which may be important in the initial divergence of populations. Future studies of RI in Cyrtandra should include a broader range of species to determine if postzygotic isolating barriers are foremost in the maintenance of species boundaries in this large genus.
Output (English): yes