Evolutionary forces shaping sexual attraction in noctuid moths

Samenvatting

Finding the right mating partner is crucial for all sexually reproducing species, including humans. Variation in sexual attraction between populations is hypothesized to be important in the speciation process. To determine the role of sexual attraction in speciation, genes responsible for within-species variation will need to be identified, and the level of phenotypic plasticity needs to be assessed. Moths are ideal animals to identify these factors: i) Females attract males through a well-defined species-specific sex pheromone, which is produced in a special pheromone gland. ii) We found significant geographic variation in the pheromone blend of the noctuid moth Heliothis subflexa (Hs), especially in one group of compounds with a dual function: the acetates not only enhance attraction of conspecific males but also inhibit attraction of heterospecific Heliothis virescens (Hv) males. iii) Through QTL analysis we found one major QTL, explaining 40% of the geographic variance in the acetates, and we constructed a cDNA library from the pheromone gland to generate candidate genes involved in the pheromone biosynthetic pathway. This sets the ideal stage to identify the responsible gene(s) for the acetate variation. iv) Recently, we found that Hs females change their signal when emerged in the odor of heterospecific Hv. Such phenotypic plasticity has not been explored in moth sexual communication before. Therefore, we also propose to determine the level of phenotypic plasticity in Hs sexual communication. Identifying genes (G) and the level of environmental variation (E) will give the unique opportunity to disentangle evolutionary forces shaping sexual attraction.

Output

Hoofdstuk in boek

  • B. Frerot, A.T. Groot, J.K. Holopainen, M. Unbehend, E. Leppik(2017): Advances in Botanical Research pp. 139 - 177 , London

Wetenschappelijk artikel

Publicatie bedoeld voor een breed publiek

Kenmerken

Projectnummer

822.01.012

Hoofdaanvrager

Dr. A.T. Groot

Verbonden aan

Universiteit van Amsterdam, Faculteit der Natuurwetenschappen, Wiskunde en Informatica, Instituut voor Biodiversiteit en Ecosysteem Dynamica - IBED

Uitvoerders

R. Lievers MSc

Looptijd

01/03/2013 tot 18/09/2017