Mechanisms of Impact of Odor Substances on Host Location of .

In the chemosensory system of insects, odorant-binding proteins (OBPs) and odorant-degrading enzymes (ODEs) play a role in the host location process. This study identified and analyzed chemosensory-related genes from the transcriptomes of different tissues of male and female adults of . Subsequently, host odorants from and non-host odorants from were used to treat the adults of to clarify the gene expression changes in the insects and, combined with molecular docking, to explore the mechanism of the non-host odor interfering with the host localisation of . A total of 137 chemosensory-related genes were obtained, among which was specifically highly expressed in the antennae of ; and were highly expressed in the remnants of , selected as key genes for further research. The odor interference experiment results show that both host and non-host odorants caused up-regulation of in antennal expression, and significant changes in the expression of and in the remnants were also observed. The molecular docking results indicate that non-host compounds could compete with host compounds for protein binding sites. The non-host odor of can interfere with TyunOBPs and TyunCYPs in and affect their host localization.