Rapid convergent evolution in wild crickets

In the field cricket Teleogryllus oceanicus, mutant males with feminised forewings (flatwings) recently appeared on two Hawaiian islands. Mutant males are obligately silenced, which protects them from attack by an acoustically-orienting parasitoid. Surprisingly, we found that while Kauai flatwings are almost completely feminized, Oahu flatwings retain a larger portion of normal wing venation. Wing feminisation segregates as a sex-linked, single locus mutation in both populations, but genomic analysis using RAD-seq indicates that different genomic regions are associated with the silent morph on either island.