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dc.contributor.authorRaunsgard, Astrid
dc.contributor.authorOpedal, Øystein Hjorthol
dc.contributor.authorEkrem, Runa K
dc.contributor.authorWright, Jonathan
dc.contributor.authorBolstad, Geir Hysing
dc.contributor.authorArmbruster, William Scott
dc.contributor.authorPelabon, Christophe
dc.date.accessioned2019-02-11T10:14:20Z
dc.date.available2019-02-11T10:14:20Z
dc.date.created2018-10-22T10:20:19Z
dc.date.issued2018
dc.identifier.issn0027-8424
dc.identifier.urihttp://hdl.handle.net/11250/2584741
dc.description.abstractIn polyandrous species, fathers benefit from attracting greater maternal investment toward their offspring at the expense of the offspring of other males, while mothers should usually allocate resources equally among offspring. This conflict can lead to an evolutionary arms race between the sexes, manifested through antagonistic genes whose expression in offspring depends upon the parent of origin. The arms race may involve an increase in the strength of maternally versus paternally derived alleles engaged in a “tug of war” over maternal provisioning or repeated “recognition-avoidance” coevolution where growth-enhancing paternally derived alleles evolve to escape recognition by maternal genes targeted to suppress their effect. Here, we develop predictions to distinguish between these two mechanisms when considering crosses among populations that have reached different equilibria in this intersexual arms race. We test these predictions using crosses within and among populations of Dalechampia scandens (Euphorbiaceae) that presumably have experienced different intensities of intersexual conflict, as inferred from their historical differences in mating system. In crosses where the paternal population was more outcrossed than the maternal population, hybrid seeds were larger than those normally produced in the maternal population, whereas when the maternal population was more outcrossed, hybrid seeds were smaller than normal. These results confirm the importance of mating systems in determining the intensity of intersexual conflict over maternal investment and provide strong support for a tug-of-war mechanism operating in this conflict. They also yield clear predictions for the fitness consequences of gene flow among populations with different mating histories.nb_NO
dc.language.isoengnb_NO
dc.publisherNational Academy of Sciencesnb_NO
dc.titleIntersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plantnb_NO
dc.title.alternativeIntersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plantnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.journalProceedings of the National Academy of Sciences of the United States of Americanb_NO
dc.identifier.doi10.1073/pnas.1810979115
dc.identifier.cristin1622132
dc.relation.projectNorges forskningsråd: 223257nb_NO
dc.description.localcode© 2018. This is the authors' accepted and refereed manuscript to the article. The final authenticated version is available online at: https://doi.org/10.1073/pnas.1810979115nb_NO
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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