Indirect genetic effects and sexual conflicts: Partner genotype influences multiple morphological and behavioral reproductive traits in a flatworm.

Autor: Marie-Orleach L; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland.; Centre for Biological Diversity, School of Biology, University of St. Andrews, United Kingdom., Vogt-Burri N; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland., Mouginot P; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland.; General and Systematic Zoology, Museum and Zoological Institute, Ernst Moritz Arndt University of Greifswald, Greifswald, Germany., Schlatter A; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland., Vizoso DB; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland., Bailey NW; Centre for Biological Diversity, School of Biology, University of St. Andrews, United Kingdom., Schärer L; Evolutionary Biology, Zoological Institute, University of Basel, Switzerland.
Jazyk: angličtina
Zdroj: Evolution; international journal of organic evolution [Evolution] 2017 May; Vol. 71 (5), pp. 1232-1245. Date of Electronic Publication: 2017 Mar 21.
DOI: 10.1111/evo.13218
Abstrakt: The expression of an individual's phenotypic traits can be influenced by genes expressed in its social partners. Theoretical models predict that such indirect genetic effects (IGEs) on reproductive traits should play an important role in determining the evolutionary outcome of sexual conflict. However, empirical tests of (i) whether reproductive IGEs exist, (ii) how they vary among genotypes, and (iii) whether they are uniform for different types of reproductive traits are largely lacking. We addressed this in a series of experiments in the simultaneously hermaphroditic flatworm Macrostomum lignano. We found strong evidence for IGEs on both morphological and behavioral reproductive traits. Partner genotype had a significant impact on the testis size of focal individuals-varying up to 2.4-fold-suggesting that IGEs could mediate sexual conflicts that target the male sex function. We also found that time to first copulation was affected by a genotype × genotype interaction between mating partners, and that partner genotype affected the propensity to copulate and perform the postcopulatory suck behavior, which may mediate conflicts over the fate of received ejaculate components. These findings provide clear empirical evidence for IGEs on multiple behavioral and morphological reproductive traits, which suggests that the evolutionary dynamics of these traits could be altered by genes contained in the social environment.
(© 2017 The Author(s). Evolution © 2017 The Society for the Study of Evolution.)
Databáze: MEDLINE
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