Table 1.
Olfactory-related gene families and the number of genes expressed in the antennae
| Olfactory-related genes | Genome annotation | Novel gene | D_M | D_F | W_M | W_F |
|---|---|---|---|---|---|---|
| Olfactory genes | ||||||
| Odorant binding proteins (OBPs) | 44 | 2 | 30 | 30 | 30 | 32 |
| Odorant receptors (ORs) | 71 | 7 | 42 | 44 | 51 | 51 |
| Sensory neuron membrane proteins (SNMPs) | 2 | 0 | 2 | 2 | 2 | 2 |
| Ionotropic receptors (IRs) | 18 | 6 | 12 | 14 | 15 | 16 |
| Chemosensory proteins (CSPs) | 22 | 0 | 20 | 18 | 19 | 18 |
| Potential ODEs | ||||||
| Glutathione S-transferases (GSTs) | 23 | 0 | 18 | 19 | 20 | 20 |
| UDP-glycosyltransferases (UGTs) | 45 | 0 | 18 | 19 | 21 | 21 |
| Carboxylesterases (COEs) | 76 | 1 | 34 | 38 | 36 | 36 |
| Cytochrome P450 (P450s) | 84 | 1 | 29 | 31 | 38 | 39 |
| Aldehyde oxidases (AOXs) | 6 | 0 | 3 | 3 | 3 | 4 |
Genes with FPKM ≥1 in at least one of the four antennal samples were considered to be expressed. The genome-annotated genes were retrieved from the previous studies, including OBPs [58], ORs [59, 60], SNMPs [42], IRs [59], CSPs [61], GSTs [62], UGTs [63], COEs [64], P450s [65], and AOXs [66]. Novel genes were identified in transcriptome assembly, and its corresponding sequences were included in Additional file 7: Table S6