Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Olfactory sensilla and olfactory genes in the parasitoid wasp Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae)

Al-Jalely, B.H. and Xu, W. (2021) Olfactory sensilla and olfactory genes in the parasitoid wasp Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae). Insects, 12 (11). Article 998.

PDF - Published Version
Available under License Creative Commons Attribution.

Download (3MB) | Preview
Free to read:
*No subscription required


Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) is a tiny natural egg parasitoid of several agricultural pest insects, which has been widely used in the biological control for Plutella xylostella, Helicoverpa armigera, Spodoptera frugiperda and Ectomyelois ceratoniae. However, limited studies have been conducted on T. pretiosum olfactory system, which is critical in regulating insect behaviours. In this study, T. pretiosum 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 T. pretiosum genome, 22 putative odorant binding proteins (OBPs) and 105 odorant receptors (ORs) were identified, which were further compared with olfactory genes of Apis mellifera, Nasonia vitripennis and Diachasma alloeum. The expression patterns of OBPs between T. pretiosum 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 T. pretiosum host-seeking and oviposition behaviours. This study enriches our knowledge of T. pretiosum olfactory genes and improves our understanding of its olfactory system.

Item Type: Journal Article
Murdoch Affiliation(s): Food Futures Institute
Publisher: MDPI
Copyright: © 2021 by the authors
Item Control Page Item Control Page


Downloads per month over past year