Fig. 1.
Response of backcross (BC) males to pheromone blends with species-specific aldehydes. The graphs show the percentage of male moths of each C27 genotype with successively stronger responses to the test pheromone blends. TF = took flight, Cast = cast back and forth in search of pheromone plume, LO = locked-on to the plume, UPW = flew upwind less than halfway to the source of pheromone, HLF+ = flew at least halfway to the source, CA = close approach to the source (<5 cm), SC = source contact by male. (A) Males tested were progeny from a first BC to Hs and the blend tested contained the Hv compound, Z9-14:Ald. The two genotypes are homozygotes for Hs-C27 (no copies of Hv-C27; solid gray triangle) and heterozygotes for C27 (one copy from Hv; solid black circles) (B) Males tested were progeny from a first BC to Hv and the blend tested contained the Hs compound, Z9-16:Ald. The two genotypes are homozygotes for Hv-C27 (no copies of Hs-C27; solid gray triangle) and heterozygotes for C27 (one copy from Hv; solid black circles). See main text for details.
