Olfactory Sensilla and Olfactory Genes in the Parasitoid Wasp <i>Trichogramma pretiosum</i> Riley (Hymenoptera: Trichogrammatidae)
<i>Trichogramma pretiosum</i> Riley (Hymenoptera: Trichogrammatidae) is a tiny natural egg parasitoid of several agricultural pest insects, which has been widely used in the biological control for <i>Plutella xylostella</i>, <i>Helicoverpa armigera</i>, <i>S...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/6f7ab212827646b798dbd8d8a23b3989 |
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| Sumario: | <i>Trichogramma pretiosum</i> Riley (Hymenoptera: Trichogrammatidae) is a tiny natural egg parasitoid of several agricultural pest insects, which has been widely used in the biological control for <i>Plutella xylostella</i>, <i>Helicoverpa armigera</i>, <i>Spodoptera frugiperda</i> and <i>Ectomyelois ceratoniae</i>. However, limited studies have been conducted on <i>T. pretiosum</i> olfactory system, which is critical in regulating insect behaviours. In this study, <i>T. pretiosum</i> adult antennae were investigated under ascanning electron microscopy (SEM). Four types of olfactory sensilla were observed, including chaetica sensilla (CS), trichoid sensilla (TS), faleate sensilla (FS) and placoid sensilla (PS). Using <i>T. pretiosum</i> genome, 22 putative odorant binding proteins (OBPs) and 105 odorant receptors (ORs) were identified, which were further compared with olfactory genes of <i>Apis mellifera</i>, <i>Nasonia vitripennis</i> and <i>Diachasma alloeum</i>. The expression patterns of OBPs between <i>T. pretiosum</i> male and female adults were examined by quantitative real time PCR (qRT-PCR) approaches. Three female-specific OBPs (TpreOBP19, TpreOBP15 and TpreOBP3) were identified, which may play crucial roles in <i>T. pretiosum</i> host-seeking and oviposition behaviours. This study enriches our knowledge of <i>T. pretiosum</i> olfactory genes and improves our understanding of its olfactory system. |
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