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  Within-population variability in a moth sex pheromone blend, part 2: selection towards fixation

Groot, A. T., van Wijk, M., Villacis-Perez, E., Kuperus, P., Schöfl, G., van Veldhuizen, D., et al. (2019). Within-population variability in a moth sex pheromone blend, part 2: selection towards fixation. Royal Society Open Science, 6(3): 182050. doi:10.1098/rsos.182050.

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http://dx.doi.org/10.1098/rsos.182050 (Publisher version)
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 Creators:
Groot, Astrid T.1, Author              
van Wijk, Michiel, Author
Villacis-Perez, Ernesto, Author
Kuperus, Peter, Author
Schöfl, Gerhard1, Author              
van Veldhuizen, Dennis, Author
Heckel, David G.1, Author              
Affiliations:
1Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society, ou_421895              

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 Abstract: To understand how variation in sexual communication systems evolves, the genetic architecture underlying sexual signals and responses needs to be identified. Especially in animals where mating signals are important for mate recognition, and signals and responses are governed by independently assorting genes, it is difficult to envision how signals and preferences can (co)evolve. Moths are a prime example of such animals. In the noctuid moth Heliothis virescens, we found within-population variation in the female pheromone. In previous selection experiments followed by quantitative trait locus (QTL) analysis and expression analysis of candidate desaturase genes, we developed a model involving a trans-acting repressor of the delta-11-desaturase. In our current study with new selection lines, we fixed the most extreme phenotype and found a single underlying mutation: a premature stop codon in the first coding exon of delta-11-desaturase, which we could trace back to its origin in the laboratory. Interestingly, we found no pleiotropic effects of this knock-out mutation on the male physiological or behavioural response, or on growth or fertility. This finding is in contrast to Drosophila melanogaster, where a single desaturase gene affects both female pheromone production and male behavioural response, but similar to other Lepidoptera where these traits are under independent genetic control. To our knowledge, this is the first time that a single point mutation has been identified that underlies the phenotypic variation in the pheromone signal of a moth.

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 Dates: 2019-02-182019-03-13
 Publication Status: Published online
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 Identifiers: Other: HEC413
DOI: 10.1098/rsos.182050
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Title: Royal Society Open Science
Source Genre: Journal
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Publ. Info: London : Royal Society
Pages: - Volume / Issue: 6 (3) Sequence Number: 182050 Start / End Page: - Identifier: ISSN: 2054-5703
CoNE: https://pure.mpg.de/cone/journals/resource/2054-5703